Ok check and see if i have this correct.
Lens 135 f2.8 prime. If used at F2.8
Then the Aperture is 135/2.8 and FL is 135. Is this right?
If used at F4 then Aperture would be 135/4 and FL is 135.
So for each F setting I would need to create an entry in CCDCalc. Is that correct.
Also I would I assume have to add any extra distance added by my CCD Camera to Lens adapter.
I have ordered a Starlight Xpreess to EOS adapter and a EOS to M42 adapter. Using this combo I am hopping to be able to use both my EOS lens and any future M42 lens I can bargain hunt down.
I found to useful sites to track down Sensor to Lens Distance requirments
http://www.markerink.org/WJM/HTML/mounts.htm
and
http://www.ayton.id.au/gary/photo/photo_lenses.htm (under lens mount adapters).
Regards
Fahim