Society for Popular Astronomy

Moon Imaging - First Attempt
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Author:  cgdtaylor [ Mon Sep 28, 2015 1:28 pm ]
Post subject:  Moon Imaging - First Attempt

In preparation for last night's lunar eclipse I tried imaging the Moon with my recently purchased ASI 120 MC. Conditions were not ideal with the Moon veiled in a light layer of high level cloud. My focusing may also not been as good as it could be and, of course, it was a full Moon.

Telescope used was Vixen 110L on a Skywatcher EQ5 with motor drive. Processing in Registax 5 & Photoshop Elements.

Comments would be valued.

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Author:  Brian [ Tue Sep 29, 2015 8:38 pm ]
Post subject:  Re: Moon Imaging - First Attempt

I think you need more signal :) The image is noisy, so one suggestion would be to get and use more frames for stacking. The stacking will eliminate random noise and reinforce the repeated signal.

Another possibility is to increase the exposure of each frame using the camera controls (shutter time/gain). I suggest you might adjust exposure until the live histogram reaches 60% or even more with this camera.

Are you using Firecapture ?


Author:  cgdtaylor [ Wed Sep 30, 2015 12:26 pm ]
Post subject:  Re: Moon Imaging - First Attempt

Hi Brian

Many thanks for the advice and will try these changes to settings. There seems so many variables between Sharpcap, Registax and Photoshop!

I did try imaging Venus yesterday with, I think, a little more success. The image attached had a longer run (30 sec) and had more images to stack (around 400).

Again thanks - Graham

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Author:  Brian [ Thu Oct 01, 2015 6:44 pm ]
Post subject:  Re: Moon Imaging - First Attempt

Dear Graham,

that is a very nice Venus image. I find Venus a difficult target to get a clear image of. Maybe a bit too bright, and rarely accessible in steady seeing :)


Author:  cgdtaylor [ Sat Oct 03, 2015 11:10 am ]
Post subject:  Re: Moon Imaging - First Attempt

Many thanks for a comment on the Venus image.

I tried my 120MC a few nights ago on some deep space objects; the results were a failure. Not least I don't think I was anywhere near in focus. I then was about to have another go at the Moon when the PC's battery gave up the ghost.

Thanks for the tip of using the histogram for assessing exposure. I would do that if I was taking a photo with my DSLR, so need to master that technique.

I have week's holiday coming up and decided to read up on Sharpcap and Registax. In the last resort - i should read the instructions!

Again thanks for the encouragement.

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