Thanks Greg,
I dont seem to be able to find a pentax 67 105mm F2.8 only the F2.4, do you have any links to the lenses you recomended? Actually, is this one of them
here http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== ?
Can this lense and the one bellow be stoped down and the FL made shorter/longer etc. and do these lenses, and other manufacturers, have filters built into them to block some wavelengths of light ?
Theres a SMC pentax 67 300mm F4
here http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== , is this the 300mm you were ferering to, and from your experience, would this lense have the aberations you said the F4 55mm had?
Also, you said you use a FLI PDF electronic focuser between the cameras's filter wheel and lens, are there other options that you know of to conect it to the stl camera. Actualy PreciseParts.com may be able to supply something.
thanks
Josh