Steve Spencer
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grahamgibson wrote:
No need, the only small prime with EXIF is the CV15 so you don't need to waste time considering the rest--only searching for a good copy of the CV without corner smearing 
And others wouldn't think EXIF is that big of a deal and shouldn't be the determining factor. I would put myself in this camp even though I just picked up the Voigtlander 15 f/4.5.
Here's how I see the comparison of the 4 lenses (CV 15 f/4.5, Nisi 15 f/4, Laowa 15 f/2, and Laowa 14 f/4).
You can make a quick division on size (the CV 15 f/14.5 and Laowa 14 f/4 are definitely smaller than the Nisi 15 f/4 and Laowa 15 f/2).
You can also make a quick division on price (the Nisi 15 f/4 and the Laowa 14 f/4 are cheaper than the CV 15 f/4.5 or Laowa 15 f/2).
If you want a detachable hood, then only the bigger ones have it. The more expensive ones if you get a good copy have a bit more sharpness into the corners, but sharpness differences are not huge and copy variation seems to be such that differences within a type of lens seems to be as big as or almost as big as difference between lenses. If you care about sunstars the CV and the Nisi are a bit better, but the Laowa lenses with 5 blades are close. As noted in the quote above only the CV has EXIF data.
Personally when I put these together, I knew I wanted a smaller lens and that narrowed it down the the CV or the Laowa 14. The price difference wasn't big enough to influence my decision especially as I could get a used CV for very close to the price of a new Laowa 14. That led me to pick the CV for its perhaps slightly better performance and its slightly better sunstars. The EXIF was a bonus, but really didn't affect my decision at all. That is just my decision making about theses lenses. Any one of them could be quite reasonably chosen with just slightly different and reasonable weighting of the differences between the lenses.
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