Originally posted by thePiRaTE!! It seems to happen to a degree with several lenses, I'm not sure why either. The Voigtlander 125/2.5 registers as a 2.4, though that would be harder to note the impact on metering. I also wish we had control over the SR focal length choices. My 25 is a 24, the 125 is a 120 and my 90 is an 85...
Also curious to hear reasoning.
also i would like to note,
the jupiter has no connections and no aperture lever, so as far as i know the camera is simply measuring light hitting the sensor... hmmm
is it possible that a FF lens is giving the cropped sensor more light in relative terms? (hope that made sense?)