Posts Made By: Pornchai Amornsrijiratorn

Hello,

I have a TEC-140#255 couple with TEC-140 FF. I just bought a new ccd
camera that have a M42x0.75 thread. I want to make a new adapter to use
this ccd camera with TEC scope.

I designed a new adapter but not sure is my desing cause vignetting or
not? Can anyone please suggest me.

Please let me know my understanding is true or wrong about vignetting by
bring the light-cone (F7.0) to place at both diagonal-rim side of the ccd chip. I
saw this from FLI-cam web site.

Please see my design at
http://www.oromelo.com/pop/tec-ff-adapter.jpg

Best Regards,
Pornchai POP

I found some manufacturer of Lens or Mirror said on their ads like "Research Grade" optic. I really don't know what is a deffinition of research grade optic. Can any one please describe this? especially Roland Christien.

Thank you very much.
POP

I saw a very good result with WO field flattener/reducer 0.8X. I believe this reducer is the best for 80ED too.