[skogpingvin (Bill)]

Originally Posted by lazjen

I'll add in my reducer. I'm trying to get this reducer to work: http://www.teleskop-express.de/shop/...Teleskope.html

Woah, 0.6 is a big correction! Am I reading that right, and the corrector gets slotted into the focus sleeve and clamped using the compression screws? For mine you take the compression screws off the focuser to reveal an M68 thread, and the corrector goes on that M68. That way there's one fewer potential slump point, like casstony said down the thread a bit.

The great thing about that corrector is that the distance from the corrector to the DSLR chip is fixed at 55mm, which is (at least for my Pentax) exactly the distance from the flange to the chip plus the width of my t-ring, and the t-ring goes straight onto the flattener using the M42 thread so there's no worry about the back focus.

Bill