Messier 7

[batema]

Hi,

This is about 6 hours worth of data with Lum 1h 45m and RGB 1h 25m for each colour channel. I have applied darks to this but when I applied my flats the whole right hand side was blurry. I don't understand so advice on this would be greatly appreciated.

I bought a light box on this forum but obviously I am doing something wrong. I use MaximDl and the capture time was 1.8 seconds so the range of data was between approx 28000 and 32000.

My equipment shooting this is Tec 140 on AP1100 with self guiding SBIG 8300m. Any comments would be greatly appreciated as I am frustrated. I did a slight blue colour balance to give the stars the bluish colour with some slight smart sharpening at the end of processing to make all the stars more obvious. I quite like the image but advice would be greatly appreciated (again).

Images in order are M7 with darks applied and then Lum M7 with darks and flats applied and my master flat.

Thanks

Mark

[Atmos]

Not sure if you've stretched that image (flat) but that 1.8s with a 8300 sensor it is likely to be the shutter that is causing the issue I'd imagine.

The first one (no flats) looks really good though! Like gems on a sandy beach :)

[atalas]

A great M7 Mark!yeah,could be shutter but the sticking shutters shadows Ive seen in the ML a quite a bit different.....more likely something got in the road of a sub....did you check for any bad subs?

[RickS]

Quite a decent M7, Mark. No idea what is going on with your flats but as Louie suggested a blink check of all the subs (before and after calibration) would be a good place to start.

Cheers,
Rick.

[batema]

Thanks all. I have just realised the SBIG has the ability to leave the shutter open when doing flats so in maxim I set the type of exposure from light to flats and it worked but that was for Ha. Always learning.

[multiweb]

Very good M7 Mark. Great starfield and star color. :thumbsup: A popular target at astrofest by the look of it. Still gotta process mine. :lol:

[Adriano]

Nice image of M7. Beautiful open cluster.