DSOs from Sg


ArchRival

New Member
Sep 17, 2006
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M101, the Pinwheel Galaxy.
Located in the constellation Ursa Major, near the handle of the Big Dipper.
The other markings in this image are smaller, dimmer galaxies.
Focal length 400mm, F/5.
Singapore


M51, the Whirlpool Galaxy, together with NGC 5159, a dwarf galaxy interacting with M51.
Located in the constellation Canes Venatici.
Focal length 400mm, F/5.
Singapore


IC 5146, the Cocoon nebula, together with B168, a dark nebula.
Located in the constellation Cygnus.
Focal length 400mm, F/5.
Singapore
 

wolvie77

Member
Nov 15, 2009
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Nice images. May I know how do u shoot such images?
 

ArchRival

New Member
Sep 17, 2006
559
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Thanks. Was merely showing it's possible to photograph some of the dimmer deep sky objects in Sg.

No Ha was used in any of the shots. I do have a Ha filter, but it's giving double star images. Probably internal reflections somewhere. Yet to solve that problem.

All shots were taken at prime focus, i.e. camera (with external, manual filter wheel) attached directly to the focuser of the telescope.
The telescope used was a small 80mm short-tube refractor. The telescope was mounted on a small german equatorial mount and auto-guided with a 250mm focal length guidescope.

Multiple short exposures were collected and stacked to reduce noise, so faint features in the targets can be brought out in post processing.