Thanks David,
I haven't fired a shot through mine yet (weather has closed in on me) but I'm hoping my setup will be OK.
I've got it set up IN FRONT of my Orion Deluxe OAG with a QHY5 as a guide cam and a QHY8 hanging off the back. I've seen some other threads in the Equipment section suggesting that other brands (the Astrotech 0.75 reducer/flattener) have a rigid separation requirement too - like the MPCC's 55mm. But the Hotech flattener does not have any reducing function as far as I can discover. Perhaps that's the difference. Well, there's only one way to find out and that means waiting, waiting, waiting ... darn!
Peter.
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