Quote:
Originally Posted by LightningNZ
You've made a typo there, the last one is NGC 2516, "the sprinter" or "running man" cluster. Super image too (they are all brilliant!).
NGC 2216 is a galaxy in Canis Major.
Would you mind posting some details of how you took your images Lee? Which scope/lens and sensor, and the exposure settings. I'd love to be able to get cluster images like these.
Cheers,
Cam
|
Good catch, thanks Cam, I've corrected the original post :-)
All images were captured with a Skywatcher BD ED80, Celestron CG5 GT, Nikon D5100 (all images were cropped slightly, also).
Specifics for each image are:
Omega Cen: ~61x30s @ ISO 800
NGC 2516: ~62x30s @ ISO 3200
NGC 3532: ~32x30s @ ISO 640
Note that all exposure counts are approximate; those are the number of frames captured for each target, but several were discarded while stacking due to tracking errors or obstructions. I'm not sure how many were discarded for each, but Omega Cen did have at least 6 because I caught something (maybe a satellite?) going through quite a few frames.
Each image was registered and stacked using DSS, then processed in Photoshop. I pulled out a
lot of detail from NGC 3532 and Omega Cen as I'd had problems before with clipping too much, so I intentionally made those exposures darker in the hope that the improved SNR would mean that I could push it more in post processing without damaging the results (which I think worked quite well in the end)
Quote:
Originally Posted by LightningNZ
Fine fishing line over the aperture will give nice diffraction spikes with a refractor.
|
Thanks for the tip! :-)
