Upload & Sell: Off
Been through a few lenses trying to find a rangefinder normal on my NEX-5N at the lower end of the cost spectrum (tried a 35mm Skopar and 28mm Ultron in store for 30 minutes but they had poor edge performance when I examined the images at home later).
I found a few used deals locally and have had a Leica 35mm F2.8 Summaron and a Voigtlander 40mm F1.4 for the past few days.
Now, in a perfect world I guess I would have a ZM 35 2.8 and a 35mm ASPH lux, but that ain't happening anytime soon!
My use is mainly travel and landscape shooting. I don't do a lot of low light, but the Nokton obviously adds a few more possibilities there.
My below impressions:
The Summaron is sharp wide open over, but a little lower in contrast and is spectacular across the frame at F5.6 onward. Field curvature seems to be a minor issue that I can work around, but need to be aware of (focus as deep as possible while retaining acceptable focus on the middle).
The Nokton is 'usable' wide open centrally although a bit hazy and fringy and quickly falls off. Fine I guess for low light portraits. More sharpness and contrast at F2 but it seems to suffer from even more noticeable field curvature which means I need to be at F8 to get great results across the field for 3D scenes. Its great there - as good as the Summaron and I'd suspect around as good as it gets. For my main uses, its academic I guess.
I do slightly prefer the wider FOV of the Summaron and it is easier to get great results at middle apertures where i'm likely to use it. However the Nokton gives me a low light option too so I guess i'll just need to keep them both for a while and see how it goes!
I am wondering however now if field curvature was the reason I noticed poor edges with the Ultron and Skopar too (it took me a while to realize what was happening with the Nokton and Summaron as I was getting 'baffling' results at first)
So, do you think the supposed angled microlenses on the 5N (which appear to work a treat with my CV 15) could be aggravating lenses with existing field curvature? Or am I speculating on things I don't really understand