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Hey
Gary,
If it was up
to me, I'd say your little Stellarvue works just fine. Vignetting is
much better than it is on my LX90 w/ focal reducer (ie the way I normally
shoot...8" at f/6). The vignetting in the lower left hand corner is from
the pick-off prism in the OAG, I assume. That's also a great FOV on that
scope. I'd love to have that FOV there. Lot of good targets out
there for you. I wouldn't give up on your Stellarvue just
yet!
-Jason
Hi Alan,
Thanks! Yes, I will probably get an
autoguider in the future but first I need a decent scope for AP. My
little 3" Stellarvue is a wonderful little scope for visual use but doesn't
lend itself well for long exposure film shots. To illustrate what I have
to deal with, here's a jpeg of the raw, untouched 2400dpi scan...
Also, I think my focus was a little off. The softness of the
finished image was induced by me using SGBNR. After all the vignetting
correction and stretching the image was very chunky looking so I kinda went
overboard on the smoothing. I definitely still have a lot to learn about
processing. And yes, the brown background stuff is really there.
That was one of the things I was trying to bring out that resulted in the
chunkiness. Even though this isn't a great image, it will give me
something to work on for future images.
Gary
----- Original Message -----
Sent: Tuesday, February 22, 2005 1:50
PM
Subject: Re: [APML] New Prime
Focus
Hey Gary,
Congrats. While guiding the 49 minute shot,
did you ever say to
yourself; "That's it, I've gotta get an autoguider?"
8-)
This shot looks funny, but I'm not sure why. It looks soft, or
not
clearly defined for some reason. Could your focus have been a
little
soft, or maybe that in combination with some guide
errors?
I see that some of the faint brown background stuff shows
here, but
cannot be certain because of glare on my monitior. Do you know
if it is
actual, or is it an artifact resulting from the
processing?
Keep on shootin',
Alan
--- GARY HATFIELD
<Starmangmh@msn.com> wrote:
>
Here's one of my rare prime focus shots from the morning of 2/6.
>
It's my longest guided exposure so far, 49 minutes, but is also a
bit
> blown out. Oh yeah, it's of M42...what else?
>
http://www.starryestateobservatory.com/My_Homepage_Files/Page51.html<http://www.starryestateobservatory.com/My_Homepage_Files/Page51.html>
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