(09-07-2019, 11:08 AM)Klaus Wrote:(09-07-2019, 08:55 AM)wim Wrote: However, light gathering is the same as any F/4 lens, just over a smaller image circle.
Yes, and assuming the same megpixels the MFT sensor collects 4x less light - so it's back to "f/8" here as well.
A lens without a camera is just a paperweight.
It's the end result that counts - nothing else.
Come on, Klaus: that is due to the sensor, not the darn lens. And I said as much anyway. The sensopr is 4x smaller, area wise, and there collects 4x less light, hence 2 stops, hence has more noise under the same circumstances as with a FF shot. The lens is stil an F/4, not an F/8. The only reason it has the DoF of an F/8 FF lens is also because of the smaller sensor. It doesn't make it an F/8 lens, however, and I am really getting rather irked about this, this "fake news". It si time we start putting this in the correct perspective.
From a design and manufacturing PoV it is an F/4 lens, whether you like that or not.
Regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....