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Moon photos
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Here's a comparison of two test moon pictures I took over the past two evenings. I was surprised there's not a great difference between a 150mm refractor and an 80mm. Each picture was cropped to nearly match the same image size.
Picture 1 One night before full moon. Refractor 150/1100mm Canon 60Da 1/800-sec at ISO 100 Picture 2 Full moon Refractor 80/600mm Canon 60Da 1/800-sec at ISO 100 |
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Beautiful photos of Luna, Kent! Both of them. My (slowly increasingly educated) guess is there's not much of a difference between the images of your two scopes because their focal ratio is nearly identical.
Refractor #1
150mm objective
1100mm focal length
1100 by 150 = 7.333... (or f/7.3) focal ratio
Refractor #2
80mm objective
600mm focal length
600 by 80 = 7.5 (f/7.5) focal ratio
That's a focal ratio difference of only 0.167 (or 0.2 if you round things off) between the two scopes. When it comes down to the image difference, my guess (again) is it has to do with dividing the scope's focal length by the eyepiece's focal length to get the image's magnification. So with things being as close as they are between your scopes, going on the premise that you used the same mm eyepiece in both, there wouldn't be a huge noticeable difference, given that everything else you took the photos with was exactly the same.
(Am I making sense to anyone other than myself?)
As for Luna's general appearance, there is just a hint of a "5 o'clock shadow" on the night-before-full image. Without a scope and photos, I doubt most people would be able to tell that Full Moon was still one night away.
"Keep looking up!"
Dino. -----Original Message-----
From: Kent Blackwell <kent@...> To: BackBayAstro@groups.io Sent: Mon, Oct 10, 2022 9:28 am Subject: [BackBayAstro] Moon photos Here's a comparison of two test moon pictures I took over the past two evenings. I was surprised there's not a great difference between a 150mm refractor and an 80mm. Each picture was cropped to nearly match the same image size.
Picture 1 One night before full moon. Refractor 150/1100mm Canon 60Da 1/800-sec at ISO 100 Picture 2 Full moon Refractor 80/600mm Canon 60Da 1/800-sec at ISO 100 |
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George Reynolds
Nice moon shots, Kent. I can really see the "Woman in the Moon", and with a little more imagination, the "Man in tne Moon". Geore George Reynolds "Solar System Ambassador" for South Hampton Roads, Virginia Back Bay Amateur Astronomers (BBAA) http://www.backbayastro.org
On Monday, October 10, 2022, 09:28:19 AM EDT, Kent Blackwell <kent@...> wrote:
Here's a comparison of two test moon pictures I took over the past two evenings. I was surprised there's not a great difference between a 150mm refractor and an 80mm. Each picture was cropped to nearly match the same image size. Picture 1 One night before full moon. Refractor 150/1100mm Canon 60Da 1/800-sec at ISO 100 Picture 2 Full moon Refractor 80/600mm Canon 60Da 1/800-sec at ISO 100 |
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