26

The first question to ask yourself is Why do I need this prime lens? Is it because they are usually faster than zoom lenses? Is it because they are usually lighter and smaller than zoom lenses? Is it because I like changing lenses frequently (cause with prime you just have one focal length)? Is it because they are usually cheaper than zoom lenses? Or is it ...


26

The 12MP designation is usually used to refer to still photography while the 1080p designation refers to video. The sensor has 12 megapixels - sometimes a little more which gets masked out. This means it takes 12 megapixel photos. Most likely this is a 4:3 aspect-ratio image which means about 4000x3000px. Video is a stream of images, most commonly ...


18

1080p refers to video: 1920×1080 progressive scan. The phone is capable of 12 Mpixel still images but only 1080p video. (This is fairly typical; it takes a lot more processing power to take video at a given resolution than to take a still at that resolution.)


10

The diameter of a lens is at least as large as the diameter of the largest element (almost always the front element though not necessarily so). The lens barrel, hood mountings etc. add a little bit to this diameter but aren't usually the determining factor. The diameter of the front element must be large enough for the entrance pupil to be visible across ...


8

Don't worry — the RAW files are the full resolution. They contain all of the data recorded by the camera. The option to change resolution is grayed out because there's no in-camera way to reduce it, not because it is stuck on small. However, for that data to be viewed, it need to be interpreted. See What does an unprocessed RAW file look like? for more on ...


7

They are saying that the maximum "wetness" of the environment should be 85% relative humidity (RH). As shown on the Psychrometric chart further down, 85% RH is an upper safety limit - air should usually be much dryer than this. At 85% RH you may need a drop in temperature of typically 5 to 10 degrees F to precipitate water out of the air. Not something you ...


7

No. Micro Four Thirds is not an open standard. The specification is available to member companies, which are listed here. It's not a tiny list, but it's not large, either. Your best bet is found on the contact page, which says (sic): To Manufacturers considering developing or selling the Four Thirds compliance product. For inquiries on Four Thirds ...


5

Because "tech specs" are sales and marketing documents meant to fulfill checkbox requirements or look good in comparisons. Calling out some of the ISO range as limited or specialized does not advance that goal. On the other hand, the camera settings and help exist to help you make the best choices for your photographic situation, so more information is ...


5

Besides looking for a sign that says "Caution, no photography, infrared lasers in use" are there any ways to check for the presence of infrared lasers before shooting? There are certainly ways to detect infrared lasers — if there weren't, they wouldn't be very useful for LIDAR or anything else. But I'm sure you're looking for a solution that's practical and ...


5

No, there's no way to deduce the max shutter speed. It's typically listed in the same specs where you'd find the kind of information you've listed, in fact.


4

A search for HTC Wildfire specifications returns very little information about the camera, but searching for specific attributes like "aperture" and "focal length" yeilded some bits and pieces. Wikipedia also had an article on sensor sizes (fourth reference below): Focal length: 3.5mm ISO: 75 Aperture: f/2.2 ? Sensor is probably 1/6" 2.4mm x 1.8mm ...


4

Any. Really, this is the good news! Any DSLR is good enough to learn photography. They all have manual controls including manual focusing, custom white-balance and shoot both JPEG images and RAW files. Sure, some are better than other but this is all you need to take control of the photographic process and will give you plenty to learn. There are two ...


4

First, it's unclear to me what you consider to be "good colors". The quality of color reproduction is a complex chain of dependencies, such as white balance, filters, iso value (color noise), lens, color space, image format, monitor and printer quality, etc. Second, most photography review sites (of which dpreview is my personal first choice) have a ...


3

The difference is that the video image is processed from still frames. The data transfer rate for full sensor resolution (i.e. 12 Mp) would be too high for normal use and there's no standard for such video. We barely make full use of 1080p video. So the hardware in your phone does a specialized and very fast scaling of each frame of video down from the ...


3

NB: this answer was written when the question was asking about the shutter, rather than the diaphragm. It may be deleted soon. There is no shutter in the 24-105; almost every camera system smaller than medium format has a focal plane shutter in the body, rather than a leaf shutter in the lens. The only exception I know of is the Pentax Q system.


3

AF Autofocus Note that with a Nikon lens, "AF" alone, not followed by other letters, means that it's the older type of autofocus which requires an autofocus motor in the body of the camera. It's an older, slower, noisier type of autofocus than a modern "silent wave" autofocus, which would be designated by "AF-s". It also means it's not compatible with ...


3

Yes it does. This falls under full manual-controls on most review sites. You can tell this by simply looking at photos of the G15 and noting the positions on the mode-dial. The one labbeled A means you can select aperture while leaving the shutter-speed automatic and the M means that you can adjust both independently. The G15 also happens to have dual ...


3

The most practical way might be to buy up old, low spec digital point and shoots and camera phones - the kind you can get for a few dollars apiece from thrift stores etc - in bulk, and use them up as expendable IR detectors before getting any valuable equipment out. Anything that can directly display what the sensor sees should work. IR is likely to be very ...


2

It's hard to be sure from the way you phrased your question, but the way I'd interpret it is that the camera you're referring to should only be used when the humidity is less than 85%. A/C reduces humidity so that shouldn't be a problem.


2

Most digital camera review sites measure color-accuracy. This is measurable in comparison between the sRGB or AdobeRGB color-space and the JPEG output from a particular camera. Where you be careful is that most sites only measure the default settings while most digital cameras can be improved greatly with adjustments. There is also a subjective component to ...


2

No one publishes standardized camera specs online based strictly on ISO standards. The basic problem is that many of these standards were originally written to be applied to categories specific to the nature of photographic film. Even though they have been updated to apply to digital imaging, there are enough differences between how film images are captured ...


2

The best answer I could find to this by googling was a "Pick and Place" blog article where the author describes what he's discovered about the EF-S mount connections: https://pickandplace.wordpress.com/2011/10/05/canon-ef-s-protocol-and-electronic-follow-focus/ It looks like you send signals on DIN's rising edge (DIN is the middle of the five small ...


2

HDMI would be the best option if need to project the screen live on TV. WiFi enabled cameras are convenient to use with tablets and phones. HDMI may not be the best option to connect to a Laptop since the HDMI ports on the computers are restricted to output. like, it's used only to project the computer screen on projector or TV. but to connect to a TV, a ...


1

For mirrorless cameras like the Canon M5 and M50, it is the processing power and speed of the camera’s digital processor. The M50 has the newest Digic 8 processor while the M5 uses Digic 7. For a DSLR camera, it is a combination of the digital processor and the physical limitations of the mechanical shutter and mirror systems. (the 1DX Mark II also has dual ...


1

The closest to a standard I've been able to find comes from looking at front-of-lens filters for solar photography - that is, filters for use with telescopes (or telephoto lenses) specifically for taking white light pictures of the sun. For visual solar observation, the standard is ND5.0. Baader Planetarium also do an ND3.8 version for high magnification ...


1

The colour accuracy depends largely on the interpretation of the raw sensor data in software. When shooting JPEG, you're obviously at the mercy of the camera firmware, but if you shoot RAW, you can utilize different profiles in your converter software, and, for greatest accuracy, you can build your own custom profiles with a colour chart and appropriate ...


1

A measurement of color accuracy is the sensitivity metamerism index. Numbers are available on the DXOMark website. Interpreting the numbers is another question.


1

It means do NOT operate the camera if the relative humidity is over 85%. Some water moisture may get inside and do bad stuff. Note, you can easily cause a camera to be exposed to much higher relative humidity. Consider shooting in Alaska in the winter. You keep the camera, and yourself in a nice warm lodge. Inside the heated lodge, the RF is very low, maybe ...


1

As has been well covered in the question What does "viewfinder magnification" mean?, the magnification rating number of any viewfinder is based on a specific focal length lens. If you double the focal length of the lens from 50mm to 100mm, you also double the amount of magnification the viewfinder provides compared to looking at the world with just ...


1

The size of a viewfinder is you see it through the standard eye-piece is magnification divided by the crop-factor. So a 0.9X on a 1.5X crop camera has the same size as a 0.6X on a full-frame. This gives a very good approximation of the comfort of using a viewfinder. However, a better measure is how big are details shown through the viewfinder. This ...


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