Crescent Nebula with C8 @ F/6.3

[RichieJarvis]

Hi All,

Been getting to grips with the C8 on the Crescent over the last few nights. Its been quite a tricky one at this focal length, but it seems to be working.

Heres a first cut:

The stats:

Ha 33 x 191 as R

OIII 30 x 212 as G

Hb 18 x 200 as Blue

Quite please with the results so far - need lots more data though to smooth it out - would be nice if I could up the exposure length as well.

Cheers, and thanks for looking,

Richie

[CELESCOPE]

Thats really close in Richie, but doing well there , always hard at that focal length, but a pleasing result for sure.

Rog:)

[steppenwolf]

Hmmmm, certainly is close in, Richie!

[Milliways]

Ooooohhh pretty!

[Catanonia]

Forgive me, but what Focal length, ISO, shutter etc was this.

Pretty close in, was it cropped.

Lovely colours, can't wait to see the final.

[RichieJarvis]

The focal length (effective with Focal Reducer) is 1260mm, this was taken with an SXV-H9, so no ISO/Shutter length, etc.

The image was slightly cropped to remove the misalignment of the frames between nights. I shot this over 3 nights.

Hoping to get some more subs tonight and over the weekend.

Cheers,

Richie

[RichieJarvis]

Update for ya.... Got a new bar for the C8, Baader one - fits perfectly.

I am now able to crank up the exposure time

Currently taking 300 second OIII subs - I've also added some 300 second Ha subs, and been a bit more ruthless with the data from the other days. Because of the different exposure times added in here, Maxim is adding it all up and giving an average exposure time

Date: 2009-06-19/20/23/25/26

Location: South Common Observatory

Scope: Celestron C8 @ F/6.3

Camera: Starlight Xpress SXV-H9

Guide Scope: Astro Professional 102ED

Guide Camera: SX Guidehead

Exposure (Ha as Red): 28 x 221 seconds - 1x1

Exposure (OIII as Green): 20 x 228 seconds - 1x1

Exposure (Hb as Blue): 16 x 200 seconds - 1x1

Thanks for looking!

Cheers,

Richie