NGC 7822 and Cederblad 214

[Martin Pugh]

Hello all
dont buy a 3nm OIII filter unless you are prepared to commit hours of exposure time - especially with just 5" of aperture!

This is a narrowband shot of NGC 7822 and the emission nebula Ced214 in Cepheus.

SHO pallete was used, and exposure time was 6:5:22 hours. First frame was 26 Aug, last was 16 Oct.

http://tinyurl.com/3y5ve4v

thanks for looking as always.
cheers

Martin

[h0ughy (David)]

Originally Posted by Martin Pugh

Hello all
dont buy a 3nm OIII filter unless you are prepared to commit hours of exposure time - especially with just 5" of aperture!

This is a narrowband shot of NGC 7822 and the emission nebula Ced214 in Cepheus.

SHO pallete was used, and exposure time was 6:5:22 hours. First frame was 26 Aug, last was 16 Oct.

http://tinyurl.com/3y5ve4v

thanks for looking as always.
cheers

Martin

So Martin, do i read that as 6 weeks 5 days and 22 hours?

Massive effort either way, looks a very fine image, its another one of the i have never seen nebulae that you keep showing us - fantastic

[Alchemy (Clive)]

Looks good to me, 5 inch scope ? what was the scope.
Quality imaging is often a function of time, something unfortunately in short supply in Melbourne

[TrevorW]

Very nice, well worth the effort IMO

[gregbradley]

A superb image Martin.

You really set the bar for high standards.

Greg.

[CoolhandJo (Paul)]

Love it! Great detail and colours

[Paramount]

Hi
The OIII and SII signal is very weak compared to the Ha in this object so long exposure time is needed, saying that though I posted an image of the same object with the same palette with much less SII and OIII exposure time than Ha, my ratio was 4:8.5:5 for SII:Ha:OIII and this was with a FSQ which is just over 4"
A nice image all the same Martin, a different colour blend to the one used, just one comment which is a personal thing, in the larger version from the link it looks a bit too smooth for my eyes
Best wishes
Gordon

[ptc (Richard)]

Personally I think Gordon's looks better. Less manipulation and purer colors. I personally don't care for the excessively smoothed background. But that is way too common these days. Like a bad flu it spreads.

still it is a nice image

as for 3nm filters; you get more junk that is not the oxygen line when you use wider filters so if you simply want to fill up your wells faster then use wider filters. if you only want the line in question then a narrower filter is appropriate.

filters and their passbands are misunderstood by many. the Custom Scientific 3nm filters are superb but sometimes people confuse fast filling wells that have other emission besides the line in question with wells that are filling with only the data being sought. The Astrodons are simply overpriced in my opinion. The value is not there in my assessment but that's what happens when you are dealing with outsourced manufacturing: everyone in the food chain wants their markup which is fair, but you can cut out the middleman that adds no value shy of marketing by going to the source.

[jjjnettie (Jeanette)]

Martin, that is superb!
I defy anyone to produce such an image using a 5" scope.

[marki]

Great work Martin, I like your version better then any of the previous attempts posted, just far more appealing to the eye.

Mark

[luigi]

Wow, it's a fantastic image! the detail is superb.

[RB (Andrew)]

That looks gorgeous Martin.

[Martin Pugh]

Thanks everyone.

It must have been past midnight when I posted this....5" of aperture?! Of course, I meant 4" of aperture - the FSQ106N.

Thanks for commenting.

Martin

[rally]

Houghy,

I think you'll find its the ratio of hours per narrowband filter SHO 6:5:22 (S2=6hrs, Ha=5hrs, O3=22hrs)
The Oxygen filter requiring a huge increase in exposure time compared to the others to produce a false colour image acceptable to Martin for his rendition.

Originally Posted by h0ughy

. . . do i read that as 6 weeks 5 days and 22 hours? . . .

Another great image Martin !

[Martin Pugh]

Thanks Rally.

Martin

[h0ughy (David)]

ta - unless its oneshot im useless - be a really good story though Martin if you did ....

[bartman (Bart)]

[QUOTE=h0ughy;647654]So Martin, do i read that as 6 weeks 5 days and 22 hours?

Isn't Houghy joking??? at least I thought he was?
Sorry Houghy...or am I missing an internal joke?

BTW beautiful shot!
I look through a lot of pics and ponder how long it will take for me to achieve pics like that.
Up until now I have never seen or heard of this neb and never heard of the designation Cederblad 214 or ced214.
( sorry dont know how to change the font format after copy and paste.....)

Learn something new every day!!!!

Cheers Martin for making me aware

Bartman

[multiweb (Marc)]

That's beautiful Martin! Smooth as. Great rendition.

[strongmanmike (Michael)]

A lovely looking image Martin, very nice job

Mike

[Hagar (Doug)]

A lovely image Martin. It is nice to see a NB image which can be viewed full size instead of the usual 800X600 images we see regularly. It is almost like they have been shrunk down to hide processing defects.

Well done.