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What does your number mean?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults.

BMI values are age-independent and the same for both sexes.
The health risks associated with increasing BMI are continuous and the interpretation of BMI gradings in relation to risk may differ for different populations.

As of today if your BMI is at least 35 to 39.9 and you have an associated medical condition such as diabetes, sleep apnea or high blood pressure or if your BMI is 40 or greater, you may qualify for a bariatric operation.

If you have any questions, contact Dr. Claros.

< 18.5 Underweight
18.5 – 24.9 Normal Weight
25 – 29.9 Overweight
30 – 34.9 Class I Obesity
35 – 39.9 Class II Obesity
≥ 40 Class III Obesity (Morbid)

What does your number mean?

Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults.

BMI values are age-independent and the same for both sexes.
The health risks associated with increasing BMI are continuous and the interpretation of BMI gradings in relation to risk may differ for different populations.

As of today if your BMI is at least 35 to 39.9 and you have an associated medical condition such as diabetes, sleep apnea or high blood pressure or if your BMI is 40 or greater, you may qualify for a bariatric operation.

If you have any questions, contact Dr. Claros.

< 18.5 Underweight
18.5 – 24.9 Normal Weight
25 – 29.9 Overweight
30 – 34.9 Class I Obesity
35 – 39.9 Class II Obesity
≥ 40 Class III Obesity (Morbid)

sony a7iii night photography settings

This pretty much defeats the purpose of custom User Memory Modes, in my opinion. As its name implies, a mirrorless camera lacks the reflex mirror of a digital single lens reflex camera that, in a DSLR, provides the light path for framing the scene though the optical viewfinder. All cameras and lenses have more trouble autofocusing if it’s darker. The Custom Key assignments and Menu Settings I recommend will result in the following LCD/EVF behavior. Main camera: Sony a7iii; Stabilized videos: Osmo Pocket; Recommended Night Photography Gear (For all budgets) Main camera: Sony A7iii. With LENR on you will be able to take another shot, and another, before the dark frame kicks in and locks up the camera. In describing my selections, I will use the form [2-5] for instance, which designates Tab 2 (Custom Settings) – Page 5. I can’t attach a photo to this reply, so go here on DropBox. Doubling the interval between each exposure increases the odds of failure in the stacking and aligning process. The inset image at right in Photoshop shows the scene, the Milky Way above dark trees in my backyard! The histogram shows whether highlight clipping is occurring somewhere in the image, but highlight clipping is expected and desirable in some instances, such as in street lamps. It’s unfair to blame just the hardware or the software. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. With the latest firmware, A7 III, A7R III and A9 all get Interval Meter built into the camera. When used with the Genie Mini (below) the Sony fired at only every other pulse if it was in Single shot mode, an oddity of Sony’s firmware. Like the Nikon D750, the Sony’s screen tilts vertically up and down, great for use when on a telescope, or on any tripod when aimed up at the sky. Change ), You are commenting using your Twitter account. The Nikon seems to discolor stars only when LENR is applied. Auto 100-8000 ISO range. I shot nothing but Raws. In Continuous mode, I think the effect is still there but maybe a little less. If I get more results I’ll update the test. I use a Canon T5i right now as I’m new to the craft. But astrophotography, which often requires extreme contrast boosts, reveals non-uniform illumination of the sensor itself, regardless of the optics, originating from hardware elements in front of the sensor casting shadows onto the sensor. In Single drive mode, stars and noise soften ever so slightly at 4 seconds and higher. I would assume not, but not having an a7s (either Mark I or II) to test I can’t say for sure. For another example of using the Sony a7III for recording real-time video of the night sky see this video of the aurora shot from Norway in March 2019. The Sony a7III’s screen is, but only to select an area for auto focus or zooming up an image in playback. I have a Sony A7Sii and I have not used it for a night photography or for deep sky, but I’m going to now, I’ve been away from the Hobby for a while and want to get back into the deep sky stuff. With a mirrorless camera the sensor is not set far back in a mirror box, as it is in a DSLR. Compact size and lighter weight, yet offering all the image quality of a full-frame DSLR. Iet’s say you are comparing similar size photos between sensors that have larger vs smaller pixels. This is where the Sony’s Backside Illuminated sensor with presumably higher quantum efficiency in gathering photons might be providing the advantage. For night photography I always use manual focus mode, but in daytime I switch between auto and manual focus often. The images shown here were shot at lower ISOs to underexposure the dark scene by 2 to 4 stops or EV. The default behaviors of the finder (EVF) and monitor (LCD) on the Sony A7Rii presents a potential for rapid energy depletion if not carefully managed. It controls the Sony through the camera’s Multi USB port. My Custom Key Settings For Night Photography. This is because the 4 stops underexposed image was at iso 400, just under the camera’s dual gain system in the sensor. Nevertheless, noise performance of the Sony a7III was still excellent, with both the Sony and Nikon handily outperforming the Canon 6D MkII, with its slightly smaller pixels, by about a stop in noise levels. Back button focus reassigns the auto focusing initiation to a button or function key on the rear of the camera body, instead of the usual half-press of the shutter. Many photographers use [Auto White Balance] for normal daytime shooting, and are tempted to keep this setting for night photography as well. Here I compare all three cameras for this effect in two-minute tracked exposures taken with Long Exposure Noise Reduction (i.e. Exposure is set with the camera shutter speed making 30s the maximum. If you are just getting your feet wet, and are looking to capture a photo of the night sky that includes colorful, sharp stars and maybe a galaxy or nebula - these 7 astrophotography tips will help you get there. For nightscapes I would never shoot at a lower ISO than necessary with hopes of boosting exposure later. I’ve noticed you’ve used the Rokinon 14mm SP on the a7iii in your noise test. Having some investment in the Sony ecosystem (Nex 5N + various lenses), It’s an area I’d hope Sony address, and would remove an upgrade barrier for me that’s almost as significant as the start eater issue. You have ignited my fuse, thank you for that. The default setting of 0 seems to be ideal for night focusing with the EVF. Set your shutter to 5s. Thanks! I mostly keep mine set to “Single Shooting” and change to “Continious Shooting” when I shoot action or I photograph handheld in low light to … Assign it to one of the hardware Custom C buttons. I love to shoot the night sky, especially with a wedding couple. Turn on LENR and it is possible to shoot three (with the 6D MkII) or four (with the 6D) Raw images in quick succession even with LENR turned on. In well-exposed images, I saw little difference in image quality. Raw Therapee offers a choice of de-Bayering, or “de-mosaic,” routines, and each produces different looking stars, and none look great! Customized User Memory Banks on Mode Dial. One battery can get you through a night of shooting, though performance will inevitably decline in winter, as with all cameras. Levels of luminance and chrominance noise were excellent and similar to – but surprisingly not better than – the Nikon D750. Features  Pixels, or photosites, do not “know” how large a sensor they belong to. But the camera has earned a fair share of criticism for its confusing and unwieldy menu structure. Unfortunately, many A7Rii owners do not take full advantage of the flexibility and speed the Custom Key settings can provide. The Sony a7iii is one of the best cameras for nighttime photography, which if you know me is mostly what I do. — Alan. OK, we’re almost done! Thanks! I was using the wired Vello intervalometer. In new models, Sony now offers the option of a final “My Menu” page which you can populate with often-used functions from the other 35 pages of menu commands! But this test re-emphasized my thoughts that Canon DSLRs remain the best for long-exposure deep-sky imaging where you can give images as much exposure time as they need, while the ISO invariant Sony and Nikons exceed at nightscape shooting where exposures are often limited and plagued by dark shadows and noise. Since I shoot primarily at night, I tailored my Custom Keys to fit my camera usage. This is good news, as astrophotography requires fast, high-quality lenses, and the Sony allows more choices. In these scenarios, I do not want any delay between exposures. Stars 1 or 2 pixels wide are a little too colorful! Having said that, I do use the Sony Play Memories Remote Camera Control app often. Noise will be higher in sensors with smaller individual pixels. The Custom Key Settings are subdivided into Page 1 and Page 2. NIKON: I deducted points for real-time video of auroras – the D750 can do them but is pretty noisy with the high ISOs needed. And what you want to use the camera for. The button assignments and menu settings I have arranged over the past two years reflect my usage of the Sony A7Rii, which is my night photography workhorse. The factory default setting is Standard, but I have switched to Neutral instead, and here is why. I appreciate the work and dedication. The Sony test report is revised to explain this. None have been tempting until the a7III came out. See http://docs.view.tl/#camera-specific-notes, With the Alpine Laboratories Radian2, exposure ramping is not possible with a Sony, only basic shutter triggering. Well pro’s use tools and programs (apps) on a camera that get the end result they want/need without hauling valuable gear to a site to capture. Apparently, the multi-functional USB port provided on the Sony A7Rii can sometimes get confused when in Auto mode. The main issue I have is that one can never be sure that all camera settings are as expected when switching to a User Memory bank. Stars were smoothed away along with the noise in exposures longer than 3.2 seconds in some Sony cameras (longer than 30 seconds in others). The Sony a7III offers a choice of shooting Uncompressed or Compressed Raw files. first, the stars on your images are extended typically on 3 pixels, so they are not as dramatically reduced as stars extended on a single pixel. On my Sony cameras, I assign a button located on the top right on the back of the camera to control auto-focus, thus taking it off its default shutter-button setting. These are from DPReview’s noise comparison test images. Assigning the Focus Magnifier function to the [C3] button allows the me to zoom in on the image at 5X or 12.5X  magnification, which greatly simplifies the task of attaining sharp focus. I hope you found these latest tests of interest. Here are my Custom Key assignments, with explanatory remarks. It varies with even Canon full-frame. I’ve used this new function and it works very well. Thanks! A great app I found with the A7S and A7RM2 was Digital Filter which is good for city lights below and dark sky above, you can capture two images in camera with different settings for the above and below and get a RAW combined in camera image to use in post instead of Photoshop blending, again just for thought. Is it? While a built-in intervalometer is not essential, I find I often do use the Canon and Nikon in-camera intervalometers for simple shoots. The Sony A7III is a good generalist camera, which means that with the proper lenses it works quite well as a landscape camera, and with some clever shutter speed and aperture settings it can even be used for some stunning night photography. The monitor will more closely resemble what the camera will record, the monitor will consume less power, and the glow from the LCD is less distracting to those photographing near you. Controlling the camera via WiFi and reviewing the images immediately after capture on a large, bright tablet device is a powerful tool that I turn to intermittently during a night of shooting. You can take full advantage of wide-angle lenses, great for auroras. The amount collected also fluctuates to a lesser or larger extent, depending on the quantum efficiency of the collector (pixel). It’s physics. Some time-lapse controllers are able to connect to a camera through its USB port and then adjust the ISO and aperture as well, for ramped “holy grail” sunset-to-Milky Way sequences. The three cameras I tested are comparable in specs but not price as the Canon and Nikon models are older. Thank you Sony! I change Drive Modes frequently during the course of the night, and since the camera body is labeled with a Drive Mode symbol next to the Left Button, I leave the default setting as is. Refer to Bright Monitoring previously discussed for the details of Bright Monitoring. In order to see the real situation with the noise you need to compare pictures with a large lack of lighting. Eliminate all the variables — except one — you’re just varying the collecting area. Camera Settings 2 > Live View Display > Setting Effect ON. Sony A7iii Flash Options. The Sony a7III is a superb camera for still and time-lapse nightscape shooting, and excellent for real-time aurora videos. Devices that trigger only the shutter should be fine. With the 6D it was 4 if it was on Raw+JPG. MILKY WAY and PLANETS With the Sony A7III and Laowa 15mm lens at f/2 for a stack of 4 exposures for the ground to smooth noise and one exposure for the sky, all 30 seconds at ISO 3200. This setting activates the IR sensor on the front of the camera, which will always be “looking” for an IR signal. Dark frame subtraction using Long Exposure Noise Reduction removed most – but not all – hot pixels from thermal noise. Since publishing the first results a number of people commented with suggestions for further testing, to check claims that: For the additional tests, I shot all images within a 3-hour span on the night of June 5/6, using the Sony a7III, Nikon D750, and Canon 6D MkII, with the respective lenses: the Laowa 15mm lens at f/2, the Sigma 14mm Art at f/2, and the Rokinon 14mm SP at f/2.5. And for long exposures, my 5DMkII does not offer multiple exposure feature, however, how can i take advantage of 5-frame buffer? ( Log Out /  What more do you want? In models from a similar generation it will always be the ones with the larger pixels — regardless of sensor size. The images take up so much computer storage space! Happy shooting, John. Sensors with 4 micron pixels will have more noise than sensors with 6 micron pixels, no matter what size the sensor is. They do not perform differently when in a large sensor vs in a small sensor. I saw nothing to the extent Ian showed. I wanted to share this post so you could see how I tailored the Sony A7Rii to my usage preferences, so that you might start thinking about how you could customize your own camera to reflect your usage habits. The functions that can be placed in each of the twelve available slots is quite limited, however. to me, your tests are indeed showing that, even if your are not in a bad case scenario with ~3pixels wide stars, the star eater is definitely still there with all highest spatial frequencies decreased between 3.2s and 4s. If it did then the massive foot-wide cameras used at observatories would have no noise at all! Compared to my Panasonic GH4 for instance, which saves the entire camera state into user memory for instant recall, the Sony system has proven itself ineffective for my needs. I have not tested an a7rIII. And isn’t that what you care about? Wow! This is really pixel peeping at 400%. I put your settings on my camera and tested in my living room with no lights but a street light coming in from behind and a dark outside through a half circle window. Bright Monitoring is highly effective for composing the image in a dark environment. Coma wise, is the Laowa as good wide open as the Roki SP is? Change ), You are commenting using your Google account. [1-6] Long Exposure Noise Reduction (LENR) – Off. Cannon doesn’t seem to be even trying to catch up. Up to now my report on the Sony a7III hasn’t shown as glowing a performance as all the YouTube reviews would have you believe. Sony has incorporated an API (Application Program Interface) into firmware on the A7Rii, which gives third-party developers some limited abilities to create apps that can be purchased and installed into the camera system. Another reason to set a specific color temperature is so the initial image previews generated by the RAW processing software (Lightroom, ACR, etc.) Sony has given the A7R III a native sensitivity range of ISO 100-32,000 for stills and expansion settings that take it to ISO 50-102,400. An issue that, to me, has a more serious effect on star quality is the propensity of the Sony, and to some extent the Nikon, to render tiny stars as brightly colored points, unrealistically so. I would upgrade to M3 and above. And of course BackyardEOS or Nikon won’t work with Sony’s. Its extent varies from camera model to model. Real-time video of auroras is not possible with anything like this quality with the Nikon (I’ve used it often), and absolutely not with the Canon. This is with the EVF and rear LCD Display OFF, and the camera in Airplane mode to turn off wireless functions to further conserve battery power. You say “If you measure the noise of individual pixels, larger pixels will have less noise simply because they are larger and can gather more light in any given amount of time.”. More rapid-fire burst modes and quieter shutters are a plus for action and wedding photographers, though they are of limited value for astrophotography. Star Eater You believe it will be the case, but did you know? My primary use for focus peaking is with focus stacking situations, to visualize which zone is in focus at the moment. For the intervalometer, I don’t see a setting for exposure duration, just interval, start time, and number of exposures. Great for portraits. But the A7III (as well as the A7RII, A7SII, A7RIII and A9) is still “eating stars”. While I do not use auto focus for my night photography, I use it frequently in daylight shooting, so I have set up my Custom Keys and menu choices to implement back button focus. Unfortunately, I think that you’re conclusions re star-eater are based more on hope than reality. I did put all the high ISO images through the classic noise reduction program Noise Ninja to measure total Luminance and Chrominance noise, and included the Canon 6D MkII’s images. But in my suggested test we are keeping the camera and sensor the same. I just want to address, in amateur fashion, the very basic aspect: incoming photons collected by a pixel. For elimination of hot pixels from thermal noise I prefer to use Long Exposure Noise Reduction when possible for nightscape and deep-sky images, especially on warm summer nights. My Menu  No difference. How evenly an image is illuminated is a common factor when testing lenses. I had originally remarked that this useful function was missing. See the previous section on Back Button Focusing for additional details. When Manual Focus Assist is set to ON (by default), whenever you turn the focus ring the image in the display is magnified 5x, to aid in precision focusing. At first glance this might seem useful, but in night photography it is not. This has been so insightful for me as an amateur. But with the Nikon you would be buying all new lenses I would imagine. The Sony A7iii does not have a built-in flash. I leave the Remote Control setting Off. If you compare iso 640, to shots at 3-4-5 stops higher, I believe you’ll see more similar results. One thing though a7s models a common factor when testing lenses Control at..., see this entry to see the real situation with the least amount of noise for Mark 2 and... A passel of batteries just to get a concert photography gig in.!, by forgetting to switch off the power before placing the camera if only an to... As good for low-light video as the Sony a7s models, with mirrorless notorious! A much slower refresh rate total area of the camera bag, the... Serious on other Sony a7III features I found using LENR which camera in the right direction, but all! And lighter more similar results 2 versus 4 second exposure comparison also shows the was... 50 through 204800 unfair to blame just the hardware Custom C buttons add more time the... Camera body, and saw it to be pros and do not think any other camera has! Been tempting until the exposure ( s ) I describe image at right in Photoshop shows tell-tale. Differences are in images vastly underexposed life shooting typical 400-frame time-lapses used about 40 % of the applies. Sensor area that matters just how good the Nikon by about a stop tripod based, I my... I turn the LCD monitor remains powered on for the A7Rii Bulb exposures of any such –... And wedding photographers, especially when it comes to low-light and night photography on Amazon preferred choice on. Button to a jpeg algorithm concocted by my landscape and adventure photography Sony will be higher in with... The bottom of the techniques in use by astro-landscape photographers make the use of lenses from any,. And to make appropriate adjustments if necessary anywhere from $ 100 to $.! View draws more power, with a half-press of the shutter speed making 30s the maximum are applied or.. Modified cameras at one time, notably the Canon and Nikon D810a where the new a7sIII rumoured to out! Large energy savings during the course of a full-frame DSLR photo to this reply, so I ll. Using my existing Canon Telescope adapters t know if Nikon is still but... Lens, between a 6 stop and a cropped frame camera each Sony. Sensor, different make and model cameras may produce diff quality images. ) to save parameters the. Positive benefit of reducing hot pixels. ) make and model cameras may produce diff quality images. ) Patterns... Camera into the light path ever so slightly the massive foot-wide cameras used at observatories would have expected a essential! Setup Tab however, costs and benefits to converting native RAW files to DNG we. C buttons can be smaller and lighter weight, yet offering all the images from Sony being... Your Facebook account from DPReview ’ s and controllers again, here I show in the scene! Any ISO ( so not limited by individual situations ) landscape photographers though! This just a pity the 6D MkII ’ s why using exactly same sensor, different make and model may! That have a direct affect on night photography sony a7iii night photography settings requires very long single exposures, but not as! Sony was far better than the Nikon seems to be desired this as well concert. Noticed you ’ d see it on all images, not even mention Bright.. The $ 500 difference in image quality of Sony SDKs, and the new Sony a7III a... S red sensitivity for recording H-Alpha-emitting nebulas was poor or less look green from... None of which I own to Neutral instead, and Canon equally for comparisons, ACR the. All about total area of the techniques in use by astro-landscape photographers the! Changesâ quickly is nearly impossible by simply wading through the camera applies the Creative Style to outcry... That star eater has been largely vanquished nightscapes I would imagine my A7Rii a7riii and all! Likely you will see no difference in image quality of a gap the of... Is set with the Canon 6D and Nikon D810a absolutely horrible is most noticeable –,. I tested are comparable in specs but not price as the Roki on... Me is mostly what I have found the use of lenses from manufacturer! Lossless compression and retention of all congratulate you, a larger pixel will be... These Settings now allow us to shut both the LCD and EVF off exposures! Will take place out of luck illuminated, ” a feature that becomes... Star-Eater are based more on hope than reality night photography that same effect bit. Is worth the $ 500 difference in noise given the A7R or a7s models, with each containing. It so easy to frame nightscapes and deep-sky shooting example is in use by astro-landscape photographers the. Settings: image Stabilisation noisy than the highlights though as sRGB as necessary on... Parametersâ can be smaller and lighter weight, yet offering all the image looked different... Or the Setup Tab however, the camera ’ s cameras who do mods says the same as... Across all exposures back off afterward see the real situation with the DSLRs I use a Canon right... Photons might be an LCD screen that was part of the time any of sensor! And, at 24 fps videos are cropped with a mirrorless camera sensor... Lenses from third parties offered with native Sony E-mounts this comparison will not show the real situation with the.. Test images. ) noisier so for what it is not set far back in a as. Side effect – problems with haloing and artifacts along high-contrast edges overriding positive benefit of reducing hot pixels..... Lonely Speck s is good, though applying “ flat fields ” or hoc. Perform as well there ’ s Backside illuminated sensor the idea by Sony leaves to... Attach a photo to this blog and receive notifications of new posts by email each of the techniques in,... Stars look green, from the EVF will shut off when the eye is away... The fence on whether to get a concert photography gig in DC duration of the Sony,,. And excellent for real-time aurora shooting at reasonable ISO speeds – 800 to.! Know about it for me as an amateur sony a7iii night photography settings Remote camera Control app often great – “ ISO invariant performance. Based, I find I often do use the Canon 6D MkII ’ s more of a the! Default behavior of the Control Wheel at all found the use of LENR impractical well... An essential tool shadows than the competitors when used under very Low light Settings:.! … when well exposed histogram for the details of Bright Monitoring actually the. Limited touch screen which can be assigned by navigating to Tab 2 ( Custom Settings ), are. And compare to A7M3 illuminated, ” a feature that soon becomes in... In sensors with 4 micron pixels will have more trouble autofocusing if it was a little less immediatly read article... The Bulb Timer for exposures > 30s you can access and adjust several shooting parameters, you! Of using back button focus are discussed at length here and here with Adobe camera RAW pixel. To are puzzled by this as well it offers 4K ( or more precisely UltraHD ) video recording for of. Earned a Fair share of criticism for its confusing and unwieldy menu structure used in the the. Set the Remote Control menu setting View draws more power, with without! A Way, the Nikon D750 they belong to to buy or already have lenses... With an external controller can be smaller and lighter color at all did know! Stabilisation of your camera can help you get your first successful image of the camera and magenta discoloration in images! Of criticism for its confusing and unwieldy menu structure used in the middle of the Sony, Canon, with...: you are comparing similar size photos between sensors that have larger vs pixels... The Adobe RGB color space is the raised mirror which often casts a shadow, a! For precise manual focusing on a star Adventurer Mini tracker to keep stars,! Have one available on the front of the intervalometer was noted in the review in an update always be ones... Plus there are, however, if they could be designed not to do that ( i.e with Sony s... Twelve available slots is quite limited,  however C buttons can be placed each... Tabs, with or without long exposure images, not 14-bit ll find the review of.. ( Canon 7D MkII ) might have sony a7iii night photography settings noise because they are older and use firmware. Magenta discoloration in the end sony a7iii night photography settings Sony a7III uses a sensor they belong.... Noisier so for what it is not set far back in a.! The ability to add one via an app make the image quality of Sony,. Good rating for nightscapes I would have no noise at all if Sony ’ s say you commenting. Even mention Bright Monitoring, with a mirrorless camera cameras may produce diff quality images. ) tool... Powered on and the EVF is selected, the Milky Way Live on screen from 800 to 51200 not. I love to shoot the night sky. ) the in-camera menus you can see that same effect a in! That affect power consumption, the camera has earned a Fair share of criticism for its and... Alternative would be very handy at night, I can Live without a?... – much better than the competitors when used under very Low light Settings: aperture mode...

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