Hi All,
I am having some difficulty understanding the whole eye piece thing. I have done quite a bit of reading now so I have a basic grasp of magnification, TFOV, AFOV etc etc and I am trying to decide which way to go. I am planning on buying a Celestron 8SE scope soon and I want to get the right set of EPs first time round rather than wasting time and money learning the hard way.
First, I wear glasses so I want good relief, I'd say about 20mm (?). Also it looks like a wider field is better too, specially for the closer objects like Sun and Moon. Of course good optical quality would be desirable as I want to use these EPs for long time and I dont want to be frustrated after a few months use.
Second, as well as visual, I also want to use a CCD. I am considering an Orion Starshooter Solar System Color Imager 3 to hook up to my laptop. (or is that item just too cheap? 1/2" cmos ccd, 1.3 Mpixel, 5.2 micron pixel, colour)
What I need clarified is the difference between 2" and 1.25" EPs, and what I need to put a 2" EP on my 8SE scope? I guess this would be easier if I had the scope to look at but I dont yet. Celestron's website didnt have any info about changing to 2" from 1.25" (not that I could find anyway) I understand that a 2" EP will give me a larger Field Stop & Field Size but how important is that?
Do I need to match the Exit Pupil to the CCD diameter or should it be slightly larger?
Any other hints on whether to stay with the standard 1.25" or swap to 2" right away?
My head is spinning from reading so much stuff...
Cheers
Mick