Oooooh, I love it when you talk dirty!
Still, let's compensate for Earth's rotation, not eliminate it. Troublesome
consequences. 🙂
A little secret — comet's all look alike, at least to this jaded Earthling.
Seen One Moose
On 10/27/2024 3:09 PM, usher99--- via olympus wrote:
Fun shot. Best way to avoid star trails is planning. I have little comet experience but plenty with astro-landscapes. You should use the maximum shutter
speed that still avoid star trails. How long depends on how picky you are. Pertinent variables include focal length, latitude, focal length, declination, sensor format
size. I use the sharp star app within photo-pils. Typically require an ISO of 3200 or so then. I usually take a test shot at higher ISO to be sure is focused
and I like the comp. Too noisy you say? Stack about 16 ish images. I use Sequater as it is quite easy. That fixes the stars but the comet will be a
mess. You would have to experiment quickly to get longest SS for the comet to look good and make a composite. If you want is all done by software I know DSS (Deep Sky
Stacker) has a comet mode but you have to put a pointer at the center of the comet with each sub. That will reduce noise about 4 stops and keep the stars aligned and the comet
just deliciously perfect. DSS is very powerful but has a steep learning curve. Sequater processes much faster and it takes 15 minutes to learn. I think the software for either
are free.
Curiously HHHR (hand held high res) mode on Oly cams WILL stack stars on a tripod if and only if
the sky is dark enough (usually class II Bortle or so and the sky predominates in the image---or will stack
the foreground. That won't fix the comet though. I can find a tutorial of HHHR use in astro if
you like. I don't know why Oly won't provide a firmware option to use with starry sky AF to limit the
stack to the sky. That would be a powerful feature.
I realize these suggestions will not fix your current image but might be useful
for the next.
Sharp stars or bust, Mike
--
What if the Hokey Pokey *IS* what it's all about?
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