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Do photographic lens show virtual image if the subject distance is less than focal length?

The camera lens acts much like a projection lens it that it projects an image of the outside world onto the surface of a light sensitive surface such as photo film or digital sensor. The power of the ...
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Do photographic lens show virtual image if the subject distance is less than focal length?

A camera takes a picture from the rays received at a given sensor plane. If this plane coincides with the plane where a real image gets projected by the lens, the sensor will pick up that image. As a ...
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Do photographic lens show virtual image if the subject distance is less than focal length?

Because "virtual" is not "real". The "virtual" image is just something used to allow reasoning and computation, it has no physical existence.
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Why are dedicated light meters supposed to be independent on the sensor?

Well, this conversion factor is unknown to a dedicated external light meter. No, the sensor reacts to the light meter exposure parameters in EV, not the other way around. EV 0 is f/0 at 1 second, ...
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1 vote

Why are dedicated light meters supposed to be independent on the sensor?

Where ISO is not the sensor sensitivity (which is proportional to the sensor pixel area and to its quantum efficiency), it is just the tunable amplification factor. This is not correct... the base ...
2 votes
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Why are dedicated light meters supposed to be independent on the sensor?

My answer is based on my humble logic so some technical details may differ from the reality :) After the sensor the amplifier is tuned on such way so if you have particular amount of light which reach ...
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