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View Full Version here: : Terzan 2 faint globular in Scorpius


John Hothersall
30-06-2012, 05:56 PM
SPX350 F4.5, ATK-16HR, Baader RGB Astronomik IR742nm filters.

This Terzan is North of Scorpius Tail and a shade south of star 45 Oph. In the dust this would look interesting in IR to see through the dust for better contrast. Notice the star a touch right of the cluster in IR is very bright compared with RGB. If you flick from one image to the other you can see the IR stars switch on and off as the dust disappears.

RGB=8x3min each. IR=8x5mins.

Thanks, John,.

spacezebra
30-06-2012, 07:58 PM
Hi John

Your captures are brilliant! Im a HUGE fan of Globs - so yes, very good to see.

Cheers Petra d.

stevous67
01-07-2012, 07:48 AM
You're doing some neat tricky dicky stuff John. Well done. Just have watch out though, your scope may explode if you push it any harder!

Steve :lol: :thumbsup:

multiweb
01-07-2012, 12:22 PM
Very cool shots. What brand of IR filter do you use to achieve that effect?

Dennis
01-07-2012, 12:24 PM
Nice work John. Blinking the non-IR and IR frames is very interesting and educational in terms of the additional details present in the IR frame.

Cheers

Dennis

John Hothersall
01-07-2012, 02:19 PM
Thanks everyone, the IR brand Marc is Astronomik 742nm from 742nm till the sensor cuts off at 1050nm. It is used for planetary but works well in deep space in Sag and Sco dust but needs to be refocused compared to the Baader RGB filters but my OAG can still guide on the stars.

John.

Stevec35
01-07-2012, 07:05 PM
Nicely done John. IR always seems to work great with these obscured globulars.

Cheers

Steve

Ross G
02-07-2012, 04:47 AM
Another great capture John.

The difference is very apparent.

Ross.