New answers tagged telephoto
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Why do telephoto lenses have long focal length?
Ironically enough, a 10 mm or 20 mm lens (on a full frame or crop sensor DSLR body) sort of is a telephoto lens, in the sense that it has be a retrofocus lens (in order to not intrude in the mirror ...
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Why do telephoto lenses have long focal length?
Put simply, every time you bend light it reduces the potential IQ; every lens element, aperture restriction, etc... there are definite negatives to making a lens more complicated than necessary; ...
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Why do telephoto lenses have long focal length?
Law of physics
In the image above, assume that the "object" is sufficiently far way from the camera so that the distance between the sensor plane where the "Image" is projected ...
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Why do telephoto lenses have long focal length?
Let's put it the other way round:
If you were to construct a lens for a desired focal length, under which circumstances would you use a telephoto lens construction?
To make it concrete, let's talk ...
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Why do telephoto lenses have long focal length?
Let us say we want a focal length of 10mm.
In order to be "shorter than its focal length", our lens design needs to be shorter than 10mm and still be large enough to illuminate our sensor. ...
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How does the Leica R Telyt-R 250 mm f/4 compare to a more modern lens?
I’ve used my 250mm f4 for many years, first on a Leicaflex SL, then the R8.
Very sharp images, even wide open as I use it a lot at village cricket matches on the village green with a monopod. I ...
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