Originally posted by kenafein That is unfortunate. It does look much more controlled with the FD lens, and almost desirable, but I wouldn't be happy with that. It happens with the 24-70 too, it seems. Supposedly it does not affect the A7R. I guess the R is the way to go, or wait until the next release of the A7.
Originally posted by jogiba I will have to test my SMC Pentax-M 20mm F4 with my full frame VG900 camcorder at night to see if it shows that.
To be fair, I am putting all this behind me.
Its not a nice problem to have, but to me, its liveable and for most of my other uses, its a fine enough camera.
Personal conclusions :
1. It does suck
2. It mainly happens with cityscape type light sources and is not noticeable for far/small light sources.
3. Most of the time, it can be cloned off, but it does mean more work and if there is nothing to use to clone, then its a problem.
4. CV12 is the smallest, widest UWA that is out there and it performs as well on the A7 as does any 12mm on a FF.
5. A7R basically writes off lots of small RF lenses from 35mm down and many legacy lenses too (not worth the trouble and less the fun w/o access to these lenses)
I'd be interested to see how that M20/4 matches up against the other 20mm options out there.
The FD20/2.8 is pretty good.
On the A7, its as sharp on the sides as the K24/2.8 is sides (so its a 20mm against a 24mm)
K24 does have better micro-contrast though.