Quote:
Originally Posted by Peter.M
I cant find any really good diagrams, but this pdf has measurement lines drawn on the dslrs to the removable collar on the MPCC so thats where I have been taking my measurements. The best diagrams are probally at the bottom (shown for visual use)
http://www.baader-planetarium.com/pdf/mpcc_e.pdf |
Thanks Peter,
It says
Quote:
|
It is their purpose to provide the proper 55mm (+/- 1mm) spacing
between the bottom surface of the MPCC T-2-thread and the “film”-plane or the eyepiece field stop.
|
I just measured my MPCC &
the glass is exactly where the bottom surface of the MPCC T-2-thread is
so they are the same measurement.
Therefore my arithmetic is correct.
Yes - those pictures using the RCC are great.
If I can do half as well as those I'll be pleased.
Tell me - do you have your nose piece removed on your QHY9?
If so - aren't you worried about condensation?
Another point:
I wonder why QHY doesn't try to make the optical train shorter? e.g.
(1) They could put the electronics inside the filter wheel outside
& have a much thinner filter wheel.
(2) They could change the housing of the camera to make the sensor closer to the
optical window on the nose piece.
Camera manufacturers should realise that we all want as short an optical path as possible
to get more even illumination of the camera chip
& less mechanical bending from gravity.