I just received a new Nikkor 90 SW f4.5 along with a new Nikkor 120 SW f4.5.Friday
I tested them both carefully over the weekend on Ilford Pan F in a roll film back developed in Pyrocat HD with a Mamiya 12x loupe. I found the Nikkor SW 90 somewhat short-of-satisfying in terms of critical sharpness, while the Nikkor 120 is definitely a keeper there. The 120 even performed close to my Rodenstock 150 Sironar-S, and with it's huge 312mm image circle, is a no brainer - I'm very happy with it.
Regarding the 90's sharpness, it's not a 'dog' by any stretch, but it's clearly not as good as the 120, or even a Nikkor SW 90 f8 I used to own.
I figure a heavy lens like this out to give me either 1) unsurpassed sharpness, or 2) unsurpassed image circle if i'm going to be enthused to take it anywhere.
Furthermore, the lens arrived new from B&H this Friday with a few minor peculiaritites, out of the box:
1)The Serial Number on the box/invoice didn't match the serial number on the lens.
2) There was a extremely tiny burr on the rear cell barrell mating surface that prevented the rear and front cell barrells from seating 100% flush to each other. (I very very carefully took the burr down, and surfaces now mate perfectly, and then I conducted the lens test AFTER doing so.)
3) The "70mm" rear lens cap was made more like "71mm" and slips right off the rear of the lens. Fortunately, I have a spare 70mm cap that fits properly.
What should I do? My sole issue is with it's optical performance right now, the other issues are secondary.
Should I send lens back to store and request exchange for identical Nikkor SW 90 f4.5 hoping for a better sample?
Should I use store credit (assuming B&H accepts the return) and apply it towards the larger image circle Schneider 90 XL and hope for the best in terms of that lenses critical sharpness - even though this lens costs twice (~$1700) what I paid new for the Nikkor ($900)?
Should I keep lens, as I'm being too fussy?
If money was no object, I'd be inclined towards the 90XL because of use later on 5x7. I just have no experience with Schneider LF lenses other than what I read on forums on the web that the Schneider 90XL is on a par optically with the Nikkor 90 f4.5. I am a big fan of architectural photography, so the movement means alot. i just don't know if the extra 24mm of image circle is worth the extra $800.
Any insights/ suggestions appreciated.
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