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White line around my Moon


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I'm not quite sure why but every time I image the moon i get a bright white line around the circumference. Any ideas why and what I can do to stop this? I've attached my most recent effort. 

My current technique is to take an avi. in live mode with my DSLR and stack it in registax6.

Thanks in advance,

Robpost-39243-0-93216500-1429918263.jpg

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Overexposure and oversharpening will be the main causes.

With Lunar and Solar work it is important to capture what at first appear to be underexposed images/AVI's .

Once an area is 'saturated' it is impossible to bring down the level of brightness in post processing , whereas an underexpoed image can easily be adjusted 'up' afterwards.

This is very important where there is a great range of tone from inky black crater floors right up to white sunlit mountains on the Moon.

With Solar imaging it is all to easy to produce an image that has no detail in the centre of the disc due to the same overexposure , there's a surprising range between the darkened limb and the very centre.

And a heavy hand on the Wavelet sliders will very quickly destroy the edge , soft and gentle ... little by little is the order of the day ... especially where the bottom ( larger radius ) sliders are concerned.

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Thanks for the help guys, knew it would be a straight forward answer which your probably all fed up with answering. Cant say enough how helpful this group is. Feel like I've learnt so much with modest equipment and achieving more than I could ever have expected for a hobby that I initially thought might be a flash in the pan. I'm hooked, just need to convince the wife that I need a bigger and better set up.

Cheers

Rob

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Sharpening introduces it. reducing the amount of sharpening and using the denoising/deringing will help - I had to remove a similar effect from my first moon picture. Check both the deringing and bright side boxes then use the bright side slider to reduce it. It might also take some sharpness off bright crater edges.

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