Upload & Sell: On
I ended up picking the Voigtlander Skopar 20/3.5 SL II on Nikon mount. Not as good as the Zeiss but incredibly compact and good enough for me. And much cheaper than either the 18 or 21 Zeiss.
Here's what Photozone.de had to say about i in their test:
"The Voigtlander Color Skopar 20mm f/3.5 SL II Aspherical is a unique lens: it's the smallest ultra-wide angle lens available for full format DSLRs. Pancake lenses tend to have incorporated some compromises - usually they are comparatively slow and they never reach the performance levels of their bigger counterparts which can simply take advantage...Show more →
Juan, I just got the Olympus 21/3.5 with encouragement from rji2goleez. I am really enjoying it. As you search for your own copy, you may want to look into the question of single or multi coating. Here's a link.
Juan the VC Ultron 21 is really sharp. has some color cast on the sides but it is easy to correct.
The Canon 20/2.8 is good too, less sharp, but no corner problems.
The C/Y Zeiss Distagon 18/4 does work well also on the A7r.
But the Olympus is nice and small and not to expensive. Never used it myself.
Tested the Minolta MD 20/2.8 the other day and it is no good, not a straight line to find. Very hard to correct distortion. The VC is very good for architecture, almost no distortion.
Several years back I bought an Oly 21mm f/3.5 under the condition to be able to return it to the seller if it didn't meet my satisfaction. I wasn't really impressed with its performance and I ended up returning that lens. I am sure it was the single coating version, BTW. Fast forward to just 10 days ago, I bought a mint one locally. The price has doubled but it is an MC version. I am sure that it doesn't have to do with the version, whether it is an MC or not and simply with a copy-to-copy variation...Show more →
Thanks for all guys. I think my choice is the Zuiko 21