v_deakin
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 p.50 #15 · A7/A7r - performance with WA RF lenses | |
wfrank wrote:
Does anyone know how the Zeiss ZM 21 2.8 compares to a Zeiss G 21 2.8 on a NEX? The G 21 does smear in corners/edge and shows color cast too. But it is excellent in the majority of the frame. This on NEX 5N.
Wondering because of Steve Huffs comments on the ZM 21/2.8 on the A7, he seem to like it.
I do not know how the ZM21 compares to G21 on a NEX, but, in my limited experience, the G21 I have doesn't smear or show color cast on the 5N. Though it's not a regular G21 but one that's been Hawk'd to M-mount and acquired a focusing ring, which also means the rear Contax part, flaps and such are removed. Hawk also placed a protective ring on the rear element which I had to remove because it would not fit into the NEX-5N cavity. So, strictly speaking, it could be a different lens than a regular G21.
It seems also to be smear and color cast free on M9. I've never held a Leica in my hands, but when the lens finally came back (yes, it's not for the faint of heart and those who cannot wait), it reached infinity at 3 meters on the new distance scale. I could not believe that a M-Nex adapter could be that bad, so I took it to Tamarkin's Leica shop downtown Chicago. Mr. Tamarkin grabbed the lens before I finished my first sentence, slammed it on M9, took a ceiling shot and proclaimed it vignette free. I've no idea what lens setup he used, but after that he let me play with it, and, remember, my only concern was the infinity and the calibration of the distance scale. To make it short, the scale was perfect, we even used a measuring tape. I took a few shots on my card which didn't show any edge problems, but when, a couple weeks later, I imposed on Mr. Tamarkin for a second time on account that it was difficult to verify infinity in the confines of a little shop and asked for a few more shots through a window, this time the shots showed a barely noticeable magenta edge though no smearing. It could be that the second time the M9 was not set to the same lens as the first time. The infinity was fine.
As to my Nex-5N, I got a second M-Nex adapter from Fotodiox, A Pro version this time. It was an improvement and showed infinity at 5 meters, I dropped into it a few loose shims I had left over, and, lo and behold, it was on the mark.
I do not know whether it was the infinity or my first ever range finding experience, but I had to to have a very large Bloody Mary.
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