Witchs head

[turbo 2011]

I was planning on having ago at imaging this I know it's a large object what would be best to image this I have a wo110 also a Borg 60 using a canon 20da what you all think

Cheers lee

[iksose7]

here you go turbo, this will help a lot for planning a image. http://www.12dstring.me.uk/fovcalc.php

[turbo 2011]

Cheers mate

[ollypenrice]

It's enormous. It's also persecuted by flare from Rigel, even when the star is off shot. I couldn't use the reducer in the Tak FSQ85 because it picked up this flare, but using it unreduced at 450mm I was able to get it flare-free with a 15mm square CCD chip in a 2 panel mosaic. Clearly Rigel is an optical challenge!! 

There's more. (Sorry!!) The Witch lies right in the path of more satellites than you can shake a stick at, so you will probably find your picture vandalized by high flying modern technology. This was a great chance for the sigma clipping routine in Astro Art 5 to strut its stuff, which it did brilliantly by making them all disappear, though I had a hell of a lot of subs. You need a good, well-adjusted Sigma stacking routine because, for me at least, every single sub had a sat.

This is the 2 panel at 450mm FL and the 15mm square chip; http://ollypenrice.smugmug.com/Other/Best-of-Les-Granges/i-T6SPJrR/0/X3/WITCHEAD%20NEBULA-X3.jpg

At some point I want to add Ha for the background because it is certainly there.

Olly

[Ibbo!]

I want to have a go at this

Olly RGB I take it, what sort of sub length ?

Thanks Steve

[turbo 2011]

Wow that's some photo mate think I mite just give this one a miss for now camera lens could be the way forward me thinks ?

[steppenwolf]

The enclosed graphic gives a good indication of the FOV for both of your telescopes when used with the Canon 60Da:-

[turbo 2011]

great mate thanks for the help love this site

[ollypenrice]

I want to have a go at this

Olly RGB I take it, what sort of sub length ?

Thanks Steve

LRGB in 10 min subs. Were it not for the problem of Rigel and the satellites I'd have gone for longer.

Olly