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If you want corner to corner sharpness, this is a very good lens. It significantly outperforms these lenses in the corners. Compared to similar 50 mm lenses such as the nikon El-Nikkor 50mm f/2.8 and the Nikon 50mm f/1.8 reversed, it has less resolution and sharpness although the difference is pretty small. This lens shows good sharpness and resolution across its usable magnification range of 0.5x - 4x. Numbers at each aperture setting will tend to improve as the magnification is increased and worsen as the magnification is decreased.) Overall the best corner performance that I have com across to date. i haven't seen this before with a lens.Īt smaller apertures, the lens shows virtually the same sharpness and resolution in the far corners compared to the center. This results in negative corner sharpness numbers. The interesting part is that the corners outperform the center at larger aperture - i.e. The corner performance of this lens is extremely good, even at large apertures. I would suggest that f/8 is adequate at lower magnification and f/6.7 is good for higher magnification. The only problem with that is a loss in depth of field at f/6.7. There is a good argument for using f/6.7 since the sharpness is very nearly the same as F/8 and the resolution is superior. The sharpest aperture is f/8 and the most resolving aperture is f/6.7. Prices vary a lot online, shop around.īasic Function: Requires a bellows to set focus and magnification Extension Street Price: $150-$200 in good used condition. Not the easiest adapter, but it works.įilter Thread: 34 mm on the lens. Then you get a 58-52 mm step down ring and then that can be screwed into a reversing adapter. I then found a 57-58mm step-up ring and screwed that into the Minolta side. When I bought a Minolta version of the extension tubes, I found that the threads were reversed and the male Nikon portion and the female Minolta portion have the same threads. My inital though was to get a cheap 5-piece extension tube set off of eBay and since these are modular, I could screw the Nikon male portion onto the Minolta female portion (This works well for many lens mounts). Needed Adapters: This was a tough lens to adapt to a Nikon mount. Back Lens: Minolta 50mm f/3.5 Rokkor-X auto bellows