Godfrey
somewhat colored
Great shot, considering the circumstances.
Completely rained and clouds here (south Puget Sound). My longest prime is a 200mm f5 OM Zuiko. Move it to f8 and adapted to my EM10 it does a credible job, but of course 200 is 200, that means at the image plane the moon is 1.8mm diameter. That 600 Sigma looks it does a pretty good job for a mirror lens.
Just remembered I do have an ancient 2.4 inch refractor, 700mm for f11.7
It’s a typical air spaced doublet and one of these days I’ll have to mount the M4:3 to the prime focus just to see how it does.
Thanks! I'm pretty amazed at the job this Sigma can do, once you know how to work around its shortcomings. You need a very sturdy tripod, IBIS off, and patience to get the focusing just right.
On the other hand, and a digression from the focus of this thread but on the subject of amazing performance, I was wandering around with the Hasselblad 500CM fitted with an ancient (1967) Sonnar 150mm lens and the new CFVII 50c digital back last week. I was sitting outdoors eating my lunch and saw the quarter Moon in the sky. "Hmm, I wonder how big a disk that would make?" So I stuck the camera on the tripod and snapped a shot.
Looking at the unedited capture, I said, "Hmm, a bit of water in the air, but there seems to be some detail in there. Let's adjust the settings to suit the Moon best.
"Hmm. Not bad, but darn that Moon is a tiny disk. Seems to be some detail in it ... I wonder." So I cropped down to the pixelation limit...
and ... OMG! ... That's one helluva sharp lens! 😀
Sorry for the digression from mFT stuff, but I'm still blown away by that example of lens quality.
G








