I’ve been watching as the reviews start to come in for this exciting new lens from Nikon. So far, the results are extremely promising! Consensus being: this lens is highly optimized for astro-landscape work, as it ought to be, with very low vignetting and almost zero coma, the two things were almost every other lens falls flat on its face. The one thing remaining for me to determine is, how this lens handles field curvature at infinity (star) focus. Pretty much every lens ever made wider than 50mm has at least some issues with field curvature, either right out of the box or at least after a year or two of heavy use.
Ken Rockwell’s Review
Some people require a pretty hefty grain of salt with Ken’s reviews, but I tend to trust them quite readily if he has actually held and used an item. And according to him, this lens renders even the legendary Zeiss 21mm f/2.8 Distagon obsolete. YOWZA!
Sample images demonstrate incredible sharpness wide open, even right up to the very corners, and seemingly flawless sharpness by f/2.8 or f/4. This review also contains the only coma test sample image I can find online, and it is VERY impressively lacking coma “wings”!
Wow, there’s no CA whatsoever! This has been one of the ONLY issues that previous Nikon f/1.8 G primes have faced: nasty purple fringing, and/or CA. Apparently, the 20mm bucks that trend. Also, although not flawless in the corners according to this test, it does show up the incredible Nikon 14-24mm f/2.8 at 20mm and f/2.8!
In short, folks, it looks like we have a winner on our hands. All of those with a (justified, healthy) phobia of early-adopting, feel free to submit your orders now. ;-)
I’ll report back as soon as I can get my hands on a copy of this lens to test for field curvature at infinity, or when I find some more testing elsewhere!