retrofocus
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 Re: When will a 3rd Leica EVF camera come out? | |
mgscheu wrote:
wolfloid wrote:
A 35 lux becomes a 50/2 (when accounting for possible focus separation potential) - that’s ok, but the final FOV and speed does not reflect the price.
A 28/2 becomes a 40/2.8 - boring. A 28/1.4/1.5 becomes a 40/2 - interesting but, with the adapter, huge.
Same for the 24/1.4 - it becomes a 35/2, but huge.
Though the lenses still have the same physical focal length and physical aperture size, so the f-stops are still the same. f/2 is still f/2, etc. The light per unit area, on the sensor, is the same.
Correct but practically the above described change in depth of field caused by the cropped sensor is a visible effect. Same with focal length - it doesn't change physically but the field of view due to the crop factor changes and makes a lens longer with the crop factor in place.
I always found the physical matter that the lens FL and f-stop itself doesn't change on a crop factor camera a weak comfort since it practically is of no use and seen is the change in longer depth of field (one stop) and longer field of view.
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