Hey everyone, just bought a Mamiya 645 for me and my girlfriend to use for regular photography. Quite popular these days it seems… Anyway after doing some research I’m thinking about mounting it on my star tracker for astrophotography. My setup now is: Star adventurer, Canon eos 800D and 200mm Takumar lens (also have an 8inch dob). The Mamiya came with the 80mm 2.8 lens.
So my plan is to mount the Mamiya like I would with my dslr. Adding a guiding setup (ASI120MM MINI + Guide scope) for guiding and polar alignment through Sharpcap.
I know a real mount like the HEQ5 would be way better, but it’s too expensive for me at this time sadly.
Will this work? I’d like to try North America nebula, Orion, Pleiades, California nebula, … Let’s say I would like to photograph the Orion Nebula. I’ll do my polar alignment, turn on bulb mode and use mirror lockup and a cable release. What film is being used these days for AP that’s available to me? I’ve read about Kodak E100 and Fuji Provia 100F. Also, how do you frame your picture? Are the stars bright enough through the viewfinder? Another downside of star tracker is the lack of GoTo system, so my framing will have to be spot on, but at the same time this isn’t impossible at the 80mm focal length, right? Usually I take multiple shots for framing on my DSLR but that’s obviously not possible here.
How long should/can my exposure be for ex. Orion Nebula at F4 80mm. I’ve seen someone do 80minute milkyway exposure and someone else 15minute exposure on Orion, so really no clue. I know, a lot of questions but I’d really like to try this, but as you can tell I’m a total noob at film. Please help with my workflow or link me some relevant posts if you have time, thanks!