NGC 6334 and NGC 6357 in HA with 150mm Achro

[avandonk]

After the fourth all nighter in a row managed to get 5x4min at 1600 ISO of these just before dawn.
Processed with ImagesPlus and RegiStar leveletc in PS.

Both these nebs are mainly HA as any O3 or Hb has been scattered by intervening dust. Which also renders them quite faint.

Bert

[Garyh]

Sure works at treat picking up the fainter Ha Bert.You just can`t see all of that in normal bayer imaging!
cheers Gary

[Alchemy (Clive)]

2nd time in 2 days youve pulled out nebulosity i didnt know was there, sure is sensitive that chip.

[avandonk]

Thanks for the comments. Gary and Alchemy it helps that the 150mm diameter achro with focal reducer is working at f/4.5! Here is a better version corrected with a HA flat.

This Skywatcher 150mm F5 is only about $800+ in Australia. For narrowband an Achro is fine as long as it is well corrected. This one certainly is as the stars with FR/FF are good to the corners on a full frame camera. I could use the Astro Physics FR but would need to shorten the tube to attain focus at the optimum reduction. This would then make the scope an f/3.75! I am more than happy with the current performance.

Large image 1.4MB
http://members.optusnet.com.au/~trlee8/hafl.jpg


Bert