whatsisname
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Why do we need a DOF preview button?
18 votes

Hitting the DOF preview with a stopped down aperture should make it obvious: what you see can be very dim, dim enough it can be very difficult to compose and focus. That's why cameras have the lens ...

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How is actual focal length greater than focal range of lens?
16 votes

When the engineers are designing a lens, the 70-300 is a target focal range they design to, but it's not important that they hit it exactly as long as it covers the advertised range. As they tweak the ...

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How can I crop a single layer in Photoshop?
15 votes

You can also select the area you want to crop to with the rectangular marquee tool, invert your selection, then delete the now selected outside area. This is different from the layer mask in that it ...

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Why do we actually need to adjust white balance?
Accepted answer
9 votes

The perceived color of an object depends on two elements: the intrinsic color of the object, and the color spectrum of the light shining on it. A red apple for example, will appear nearly black with ...

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Why does the Canon 450D have only 14bit depth RAW images?
Accepted answer
9 votes

The 14 bit depth is the limit of the physical sensors capabilities, it isn't just that the engineers decided to throw away useful data. An increasing number of bits available in a sensor reflects an ...

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Will using a micro SD & adapter instead of a normal SD card affect the quality of pictures and video?
8 votes

In my camera, that's what I have, and I have no problems. At worst, your transfer speeds may be slower. But it will most definitely not affect the images captured.

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Why are Curiosity Mars rover photos black and white with huge white border?
Accepted answer
7 votes

There are 17 cameras on the rover. The primary camera system, the MastCam, hasn't even been deployed yet. The mast will be raised and the cameras brought online within the next few days or weeks. The ...

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Could I get decent underwater photos from a waterproof compact camera or is it worth buying a housing?
6 votes

I think the point and shoot is the way to go. They are smaller and trivial to transport with you at all times. You never have the issue of bringing the camera and leaving the housing, only to find out ...

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How are the smooth, colorful backgrounds created in these wildlife macro photos?
3 votes

Context for Question 2: Most macro lenses peak at f2.8, I've never obtained such a beautiful and smooth background even at this aperture. You don't need a huge aperture. You can get better bang for ...

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F-stop vs T-Stop - how do I quickly grasp a videographers view of the world?
1 votes

Just to add to the other answers, I want to address: I wanted to quickly understand how they were managing to get such a good picture in relatively low light. They had a long depth of field on a ...

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How do i take a photo of an object perfectly vertical like a top view?
1 votes

The other answers talk about some physical aspects of the setup, however, you may still encounter lens distortions bad enough to be a problem when cutting out your shapes. If there is a problem, there ...

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How to record the viewfinder while shooting?
1 votes

I think you'd have a far easier time just straight up shooting in video mode, then mocking up the HUD as an overlay in post.

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Why are tripod legs and heads sold separately? Why no 1-piece tripods?
1 votes

High end tripods are sold without heads, because you can select the head you need based on the photography you'll be doing. See Why are some (higher end?) tripods sold without a head? Also, What ...

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Is "saturation" an image-processing concept?
0 votes

Saturation is a mathematical concept of Color Theory, and it is abstracted to a higher plane than film, digital images, etc. While Hue, Saturation, and Value color models were developed for use in ...

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