Larry,
I haven't done much of astro-photography, so, I am just
curious: why focusing at infinity wouldn't work in this case
(i.e. turning the focusing ring to the end of the range)?
Is it just because the particular lens(es) are not designed or
manufactured well for infinity focus? (E.g. they have "beyond infinity"
focus at the end of the wring range.)
Igor
Larry Colen Sun, 04 Dec 2016 11:49:18 -0800 wrote:
Jostein wrote:
Your results are on par with what I've got from single exposures with
the Sigma 500/4.5. Proper focusing seems to be the limiting factor
rather than actual MTF resolution.
Yes, focusing was a real challenge. If I remember to bring my green laser,
I can aim that at a distant point and have something to focus on. I
probably should have tried focusing on Sirius, it was a lot brighter.
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