File:Gibbous Moon with Telephoto Lens (7016151869).jpg
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| Description |
Gibbous Moon - 100% crop from 31 stacked subexposures Image Scale = 1.11 arc-second/pixel Date: 2011/11/04 - 6:52 PM to 6:55 PM Exposure: 31 out of 57 x 1/640 sec at approximately f/8, ISO 100 Lens: Nikon 800mm f/5.6 ED AI-S at about f/8 (seemed sharper than f/5.6 or f/11) Camera : unmodified Canon T2i = 550D Mount: Astro-Physics AP900 -- rough polar alignment (no drift alignment) Processing: Focusing via EOS utility live view, exposures made from live view mode (EFSC active, so no mirror slap or first shutter curtain shake?). 57 individual shots cropped to 1800 x 1500 with Photoshop CS5 to do rough alignment (Registax does not like exposures unless they are approximately aligned first). Alignment and stacking in Registax 6 with "50% drizzle". There were purplish patches in the image, so I did not use the color option in Registax. The intention was to keep the best 45 out of the 57 frames in the stack, but Registax stopped, and I had to use task manager to end it. I tried again asking to keep 30 frames, and ended up with 31 out of 57 frames. The stacked output was saved as a single 3600 x 3000 TIF, and then "wavelets" processing was done with the various guessed-at settings. The best one I tried seemed to be with linear steps and "layer" settings of 75,25,6,2,1,1. Photoshop CS5 image rotation and levels adjustment was done. Then the image was downsized back to 1800 x 1500 to get back to 100% crop and finally JPEG conversion (quality = 11) was done. |
| Date | |
| Source | Gibbous Moon with Telephoto Lens |
| Author | s58y |
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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by s58y at https://flickr.com/photos/45032885@N04/7016151869. It was reviewed on 19 December 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:36, 19 December 2021 | | 1,500 × 1,800 (521 KB) | Siloepic (talk | contribs) | Transferred from Flickr via #flickr2commons |
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