Originally posted by torashi That's not the case for $$ony, for example, since the mount is so narrow that lenses require special designs to overcome that limitation and the weight advantage isn't that considerable.
But if you're comparing the 645z with the available mirrorless options, there is a huge difference in weight and size.
Forgive me, but - with respect - I'm not sure exactly what part you're referring to as not being the case for Sony?
I have no native E-mount lenses for my A7 MkII. I bought it, along with the LA-EA4 adapter, primarily to use with adapted vintage lenses, but also as a backup body to my Hasselblad HV (Sony A99).
I shoot the following A-mount (or Minolta AF) zoom lenses:
- Konica Minolta 17-35 f/2.8-4(D)
- Sony Zeiss 24-70 f/2.8 SSM
- Tamron 28-300 f/3.5-6.3
- Tamron 28-300 f/3.5-6.3 PZD
- Tamron 70-200 f/2.8 USD
- Tamron 150-600 f/5-6.3 (G1)
... and these primes:
- Minolta 50mm f/1.7
- Samyang 85mm f/1.4
- Tamron 90 f/2.8 Macro
The Sony Zeiss 24-70 f/2.8 came with my Hasselblad HV, and the rest were bought to shoot mainly on that camera. But I use all of those lenses on my A7 MkII with the LA-EA4 adapter, with no obvious price to pay in terms of vignetting or image quality. So far as I can tell, they perform just the same as they do on my HV.
I also shoot a wide range of adapted M42 Soviet glass on both the HV and A7 MkII from 16mm through 1000mm with no difference in results.
I'm not saying there's
definitely no difference... I could be ignorant on the matter
It's just that I don't notice any, and I perform some of my processing at 100% reproduction, so I think I'd notice...
EDIT: The only lenses I know I have problems with on the A7 MkII - and I knew this would be the case before I bought the camera - are vintage certain wide angle models designed for short registration mounts, where the rear element is very close to the sensor; an example being the Jupiter-12 2.8/35 for Soviet M39 rangefinder, which shows noticeable colour shift in the corners. Another good example is the Russar 20/5.6...
Disclosure - I'm no more a fan of Sony than any other brand. It's just one of the brands I shoot