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<blockquote data-quote="BF Hammer" data-source="post: 793463" data-attributes="member: 48483">Here is M42 Orion Nebula and Triangulum Galaxy which I photographed in 2020. I cannot recall the entire exposure time, but I am sure I was shooting less than 60 images at 45 seconds each or perhaps a bit longer. I think I had things dialed in so well on the night of Triangulum that I was shooting 60 second subs.At the time I shot these with a D750, Sigma 150-600mm C, Manual mode with f/6.3 (wide open for the lens) and I would guess the ISO would be lower with M42 than with Triangulum. Triangulum was not visible to the eye at location, but my goto telescope mount was dialed in perfect and I found it in test photos right away.[ATTACH]381458[/ATTACH][ATTACH]381459[/ATTACH][ATTACH]381457[/ATTACH]Today that setup would be with a new carbon-fiber tripod, Z5 and FTZ-2 adapter, a dew heater wrap on the lens, and a notebook PC tethered to the camera running DigiKamControl. That is a Skywatcher AZ-GTi goto telescope mount that has has the firmware and hardware conversion to run in equatorial mode. It is not certified to track for photography this way, but it works. I also use an aftermarket intervalometer but this function is even better when you can tether a PC with DigiKamControl and see the test images on a larger screen.</blockquote>

[QUOTE="BF Hammer, post: 793463, member: 48483"] Here is M42 Orion Nebula and Triangulum Galaxy which I photographed in 2020. I cannot recall the entire exposure time, but I am sure I was shooting less than 60 images at 45 seconds each or perhaps a bit longer. I think I had things dialed in so well on the night of Triangulum that I was shooting 60 second subs. At the time I shot these with a D750, Sigma 150-600mm C, Manual mode with f/6.3 (wide open for the lens) and I would guess the ISO would be lower with M42 than with Triangulum. Triangulum was not visible to the eye at location, but my goto telescope mount was dialed in perfect and I found it in test photos right away. [ATTACH=CONFIG]381458._xfImport[/ATTACH][ATTACH=CONFIG]381459._xfImport[/ATTACH][ATTACH=CONFIG]381457._xfImport[/ATTACH] Today that setup would be with a new carbon-fiber tripod, Z5 and FTZ-2 adapter, a dew heater wrap on the lens, and a notebook PC tethered to the camera running DigiKamControl. That is a Skywatcher AZ-GTi goto telescope mount that has has the firmware and hardware conversion to run in equatorial mode. It is not certified to track for photography this way, but it works. I also use an aftermarket intervalometer but this function is even better when you can tether a PC with DigiKamControl and see the test images on a larger screen. [/QUOTE]

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