My sony 6000a just isn't good enough, blocks too much h-alpa and too much noise. So im getting an astro cam for my samyang 135mm f2. Ill design the mounting rings from the dovtail to the lens myself, but. I dont understand the back focus things, my lens is e-mount. What adapter should i be using? What backfocus? These things really consfuse me. Also im getting the Omegon veTEC 533, because it has integrated ir cut, and i dont whant to deal with filters.
#veTEC 533C and samyang 135mm
solid totem
quiet vault
I'm not sure how you could mount it with a e mount lens, all the adapters are for canon and nikon mounts, you'd need 44mm of backfocus
With a Canon mount you usually can get away with using the zwo canon drawer
solid totem
mabye i can 3d print one?
would it be sturdy enough
but how do you calculate the back focus? the lengh from the lens end to the sensors? or the length from the back lens to the sensor?
quiet vault
from the back of the lens where the mirrorless body and lens bodies touch to the sensor
I'm not sure about the 3d print tho
since you're using the E mount I'm not sure how much backfocus you need, 44mm is with standard dslr bayonets
gentle gyro
https://www.zwoastro.com/product/sony-adapter-for-asi-cameras/
I tried 3d printing my own because I have a very similar setup to what u described (sony e 135mm rokinon and zwo 533mc pro), but the 3d print would never hold it sturdy enough, so I bought the real thing from zwo. One thing to note. The backfocus is too short to put a filter drawer into the imaging train so if you want a uv/ir cut filter you need to get a full aperture one for the lens.
