Telescope: Meade SN10 @ f/4, Orion Atlas EQ-G
Camera: Full Spectrum Modified Nikon D5300, Baader Mk III MPCC
Filter: Orion Imaging Skyglow Filter
Guide scope: Williams Optics 50mm, Meade DSI Pro II, PHD
Exposure: 25x120sec, ISO 200, saved as RAW
Darks: Internal (Long Exposure Noise Reduction On)
Flats: 32x1/100sec, Tee shirt flats taken at dusk
Average Light Pollution: Red zone, Bortle 8, poor transparency, bright moonlight
Lensed Sky Quality Meter: 17.8 mag/arc-sec^2
Stacking: Mean with a 2-sigma clip.
White Balance: Nebulosity Automatic
Software: Backyard Nikon, Deep Sky Stacker, Nebulosity, Photoshop
This was the 1st of 8 test images taken over 2 nights to evaluate the use of a Baader Mk III MPCC with my SN10 and my new D5300. I’m encouraged by these early results. The MPCC certainly helps the overall field, but I have a bit of a collimation issue that I need to straighten out. I’m thrilled with the performance of the camera particularly given the challenging imaging conditions. I’m still waiting for a night with good transparency to see what it can really do.
NGC 4147 is a tiny globular cluster near the border between Coma Berenices and Leo. The cluster appears small largely because of its great distance, an estimated 63,000 light years. That places it on the other side of the galaxy about as far from the galactic center as the sun. Note the little edge-on galaxy UGC 7170 (Mv 14.7) to the upper left of the cluster.
Edited by jgraham, 06 April 2020 - 09:32 PM.