oldwino
Well-known
I think Pixii needs to find another shipping partner for the US.
I think Pixii needs to find another shipping partner for the US.
It seems the same UPS Louisville Lizard which ate Godfrey's Pixii is nibbling at mine. Delivery is now 29 April between 1:45 and 4:45. Hopefully this will be the final postponement. I'll just put on a pot of soup for dinner in this chilly weather here.
However, looking at my exposures, it seems the Aporia 24/2 is not as good an optical match to the Pixii sensor as it is to the Leica CL sensor. At f/4, I expect a little corner and edge fall-off to occur, but on the Pixii sensor I see a good deal of color shifting as well as much more light fall-off than I see with the CL. The on-center sharpness is excellent, and likely would be at f/5.6-f/8 as well.
The Color-Skopar 21mm f/3.5 v1 displays a good bit of edge/corner color shifting on the Pixii sensor where it shows virtually none on either of those other two cameras (and the Hasselblad sensor is 33x44 mm, even larger than FF format). I've edited out the color shift in rendering this set of photos. It's usable but I'd have to call the Color-Skopar 21mm a difficult optical match to the Pixii sensor, same as the MS Optical Aporia 24mm f/2.
Why would the full frame MS Optical Aporia 24/2 lens show corner and edge fall-off and color shifting on a APS-C sensor? You're only using the center of the image circle.
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Same question. Why would the full frame 21mm f/3.5 Color-Skopar lens show edge/corner color shifting on an APS-C sensor? You're only using the center of the image circle.
Why would the full frame MS Optical Aporia 24/2 lens show corner and edge fall-off and color shifting on a APS-C sensor? You're only using the center of the image circle.
Same question. Why would the full frame 21mm f/3.5 Color-Skopar lens show edge/corner color shifting on an APS-C sensor? You're only using the center of the image circle.
All comes down to the same thing: the specific optical match between a sensor and a lens design. Symmetric lenses in short focal length, with a short mount register, are the hardest to match to a sensor stack. Exactly what the Pixii sensor stack looks like compared to the Leica sensors, I cannot say, but you *know* Leica has spent a great of time optimizing their cameras sensor stack to their M-mount lenses, both past and present, for best results. All the other makers' lenses benefit from that too, to some degree.
Even uncoded, there is no color shift on my Leica M10. In fact, there’s no color shift on any digital sensors, including Sony bodies.
Godfrey would you be willing to post an “undoctored” sample or two of the Skopar 21, for informational purposes?