focal reducer for f/10 Mak - need your help

janoskiss (Steve H) · #1 25-09-2006, 12:33 AM

I have an f/10 Intes MK-65 Mak that sits very comfy on an RA motorised EQ mount and comes with camera adapter bits and pieces that suit my Praktica SLR.

Me thinks a focal reducer would help me take some happy snaps of the heavens at night. I would not know where to begin looking for one and what's good and what's not and what suits my scope and what doesn't. Anything that could deliver around f/6 or faster would be great.

Any advice would be much appreciated. (Bert, I don't suppose you could make me one?

)

avandonk · #2 25-09-2006, 11:26 AM

What internal diameter is your camera adapter about 70mm from the sensor? Have you got any pictures or description of the optical train from camera to telescope.

Bert

janoskiss (Steve H) · #3 25-09-2006, 11:29 AM

I will make some measurements and post some photos tonight.

janoskiss (Steve H) · #4 28-09-2006, 11:44 PM

I still don't know where the focal plane is exactly, because I haven't had a chance to try and focus the camera. (I don't even know if I'll be able to do it.) But here are some pictures.

The camera adapter has a helical focuser and I'm guessing the focal plane will be somewhere between 100 and 120mm from the back of the scope.

Striker (Tony) · #5 29-09-2006, 07:16 AM

Steve I know the current FR I am using is designed for a Mak.

APCCD67

http://www.astro-physics.com/index.h..._acc/photo_acc

But designed for imaging.