New answers tagged digital-photography
3
Space is really REALLY big and that has an amazing impact on angular momentum. Think about the sun in the sky. We're on a ball of rock that is moving at 67,000 mph and spinning at around 1000 miles per hour, but yet the sun crawls across the sky.
The reason is because that while the speeds may be very high, the distance is even higher. At very long ...
0
I have seen the opposite behaviour in a cheap security camera system. It can be set so it records only in the event of movement in the field of view of the camera, when there is no movement, the frame rate drops to save storage. It seems to do so by comparing two succesive frames and if it detects difference among the frames it records all the frames, ...
5
"Best" is arguably a purpose built negative / slide scanner.
Good ones will provide resolutions in excess of what your original contains, and will not be cheap. without checking I'd guestimate many hundreds to several thousands of dollars.
There is a whole world of low to middle quality scanners / USB connected imagers etc. The cheapest probably start in ...
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I do believe that type of technology would be irrelevant in a camera as all you need to do to freeze action is increase the shutter speed.
You may also need the help of a flash to go along with the increased shutter speed.
1
Many cameras have focus-priority, where they will not release the shutter until focus is achieved, but I don't know any that will block the shutter release if the focus is acquired, but the subject is in motion. Never mind doing this for multiple subjects.
Nikon has a motion detection feature in some cameras that detects subject motion and increases ...
2
Yes, there are plenty of machine vision systems that will tell you if an object is moving.
I'm not aware of any cameras that implement it since it's computationally expensive (that's to say requires lots of processing).
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The camera wants it to be Zone 5 if you smush all the tones together.
The histogram wants it to be solid black at it's darkest pixel and pure white at it brightest (though thats more of a contrast thing)
You can have it anyway you choose.
Kudo's to guy who mentioned the Ansel Adams system. The king of the correct exposure.
3
I'd dare to say the correct exposure is whatever is needed for the artist to get the effect he or she desires. That might be technical perfection, but it might also be deliberate over- or underexposure used to get specific artistic effects.
I've used this myself to get seriously blown out highlights, causing a winter beach scene to look like a desert under a ...
2
Ansel Adams developed the Zone System to allow him to select the exposure levels of specific objects in his photos in relation to other specific objects with different luminosities rather than basing the exposure on a single meter reading of an object with the approximate average luminosity of the overall scene. We often forget that cameras have only had ...
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I'm not sure if this is a "how is exposure defined" question or an "is my camera busted" question, so I'll try to address both. :)
Definition of proper exposure
ISO standard 1271 contains a definition for photographic exposure.
Bypassing the math, "correct" exposure averages a scene's luminance and renders that luminance at a particular (but arbitrary) ...
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The "correct" exposure may vary some from one image processing system to another, but the general goal is to make the darkest and brightest parts of the image both fall within the dynamic range of the camera with a good white balance and natural contrast.
The bright and dark part is easy if the scene doesn't exceed the dynamic range of the camera since it ...
1
This is a dilemma most of us face when getting into photography. I would suggest that you start reading some books or visit the innumerable sites available in the internet for learning the basics of photography.
Understand the terms and techniques and put it in practice by taking pictures. Again read a different topic and practice it with your camera. With ...
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Is it possible to have exposure decrease programmatically when batch processing in Adobe Camera Raw?
While I'm not aware of any off-the-shelf solutions (and it's not native to Lightroom/ACR), there's no reason why it can't be done.
Since ACR/LR don't touch the original file (with a few exceptions related to EXIF data) but store the adjustments to be made in an XMP file, and XMP is just XML (plain text with angle brackets), there is no reason why an ...
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