1.7 = 2.5 (basically none in either; like a Summicron)
1.2 = 1.4 (slight barrel for both)
Note that the modern Summilux ASPH v1 and v2 have noticeable and similar barrel distortion, too. As has you Hexar AF, Juan. 🙂
🙂
That's interesting, Roland... I would have never thought about barrel distortion with the Hexar AF's lens: I mean, there's no choice even close to that tool in the whole world... That's a “too important lens” to me, as to even judge it in any way... I got other lenses (and formats) for low distortion if I am shooting with tripod or the camera leveled and I decide to include straight lines close to frame borders... By the way, I never did test that 35 f/2 in the Hexar AF, and have never found any noticeable barrel distortion (randomly coming) yet, but I might give it a chance soon to see if it's really like the Nokton 35 1.4... Seriously, I never saw again that picture where the 35 1.4 Nokton's distortion was so wild... To me it was surprising: I just remember it reminded me of zooms at the wide end...
Or are you and I splitting hairs too much? Here's a link to that thread where you did post an image of the Nokton 1.4 with diagonal lines instead of straight ones close to the borders... On that thread Tom A. did comment he had just tested some 35's, including all 35's by CV, and some other brands' ones, and he found all were quite close about barrel distortion... On T&T's Flickr site I saw the images, and although a more precise test would show results in a more serious way (all this is indeed boring!) I remember the Nokton 1.4 looked (to me) worse than the Nokton 1.2... I also remember on that thread there was an image made with the 35 1.4 (a tree in the background) showing exactly the same busy bokeh that can be seen sometimes on images from the 40 1.4, so all this is really relative... Anyway, here's the link to the thread:
http://www.rangefinderforum.com/forums/showthread.php?threadid=84610
And these are Tom's images:
http://www.flickr.com/search/?w=36506481@N00&q=F331
I agree with him: in most cases thinking of this is just wasting time.
If you have at hand an image from the Hexar AF with wild barrel distortion, I'd like to see it, to know what to expect, or to know what to avoid doing in those situations... Thanks!
Cheers,
Juan