So anyways, Did I fix too long now
possibly?
A 7 or 8 minute fix will not cause any
problems. (Assuming the temp was in limits)
Whats this bright ...dark spot in the middle of
my frame?
What lens were you using and at what
f/stop? I think you mentioned wide angle. If so, the
acceptance angle of the H-Alpha filter may be smaller than the width of the
field, causing vignetting. Also, a wide open f/stop will cause a hot
spot in the center of the field and more vignetting at the
edge.
Hi Rob,
I was using a 105mm f/2.5 and it was wide open
for both shots. My first shot was for 30 mins., but I forgot to set the
focus right.
The 2nd shot was focused right, but was cut
short at 23 mins, because my guidestar hid behind a tree...murphy missed
me(g).
My unfocused shot of 30 mins has the least
vignette, while my focused shot of 23 has the most.
About how far should I stop down? Will this in
any way effect my calibration mark and how it focuses?
Thanks,
Brian