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GordonH

Crescent Nebula NGC 6888 in Ha

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Hello

Another difficult night with clouds last night but managed to salvage 7x10 minutes subframes from the 21 I took, again all unguided with Ha filter. Look forward to some nights with no cloud so that I can get more subframes. There is a better quality image on my website http://www.imagingtheheavens.co.uk

Best wishes

Gordon

:grin:

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Very nice image Gordon,

Nice web site too.

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Wow! Gordon,

A cracking shot. Lovely wide field and great depth. I tried this from a dark location and really struggled to get much clean data. Really good

Anthony

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Hi Anthony

Thanks for the comments, just a couple of questions, if you tried at a dark site did you use a Ha filter and if so how long were your subframes? This is assuming you were using a monochrome camera. I'm only asking because when you combine a monochrome camera with a Ha filter and 10 minute+ subframes you will be in for some stunning shots. It only works on certain subjects though like emission nebula, supernova remnants, some planetary nebula, etc but the results are well worth it

Best wishes

Gordon

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Hi Peter,

It was a single 20 min exposure through an F9/100mm refractor and the SXVH9 mono / astronomik Ha filter. An F6 or F7 scope would be more suited of course, but this combo and proved itself on many deep sky objects through braod and narrowband filters.

Maybe what got me was the amount of background emission and that "fogged" the black background i was expecting. I had a quick process and decided that it was going to be another target that night.

Still, though your images shows much more than mine was ever going to had I persisted. Nice one

Anthony

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