Flying Bat and Squid Nebulae in Cepheus

[MartinB]

Another terrific image Steve with near invisible processing.  Do you have any coordinates for this target?  Sky6 doesn't have the SH2 catalogue.

Re sub times - with my QSI 532 based on CCDware's sub exposure calculator   I need to have a background ADU value of around 500 for sky glow to be swamping the impact of read noise.  I've got mag 4-5 skies and get up to this level quite quickly with broad band filters.  With NB I am still under at 30 mins so in an ideal world I would go longer but don't for the reasons you mentioned.  I find 30mins work better than 20 despite the higher risk of chucking frames.  I think 10 subs is a minimum for statistical rejection and agree that 12 is probably better.  It is awful to have a sub running for 27 mins only for one small cloud to zip across at the end!

 

[gnomus]

48 minutes ago, MartinB said:

....Do you have any coordinates for this target?  Sky6 doesn't have the SH2 catalogue....

Thanks for your kind words, John Martin (not sure what happened there - apologies)

PI's FITSHeader reports as follows:

And. for laughs, this is what a single OIII sub looked like with the standard PI STF applied.  No, I don't see the squid either.

[Allinthehead]

That last effort is a cracker. 

[gnomus]

Thanks, Mr Head. 

[MartinB]

2 hours ago, gnomus said:

Thanks for your kind words, John Martin (not sure what happened there - apologies)

PI's FITSHeader reports as follows:

And. for laughs, this is what a single OIII sub looked like with the standard PI STF applied.  No, I don't see the squid either.

Thank you!

[ollypenrice]

4 hours ago, gnomus said:

Thanks for your kind words, John Martin (not sure what happened there - apologies)

PI's FITSHeader reports as follows:

And. for laughs, this is what a single OIII sub looked like with the standard PI STF applied.  No, I don't see the squid either.

Which only goes to show what a great job you've done of the target!

Olly