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lets imagine I wasn't to see a nice DSO about 15' size and I think it should look good nicely framed with a 1 deg field of view in the EP..
Which would give the better (or higher probability of seeing anything at all ) view from a semi urban light polluted home site (e.g Bortle 6)?
a) an 100mm f/6 refractor (fl 600mm) and a 10mm EP (60 deg afov, gain 60x = fov pf 1 deg)
(and exit pupil of 100mm / 60 = 1.6mm)
b) a 200mm SCT with focal reducer to give f/6 (fl 1200mm) and a 20mm EP (60 deg afov, gain 60x = fov of 1 deg)
(and exit pupil of 200 / 60 = 3.3mm)
My gut feeling is that the SCT should give a better view just based upon its 2xaperture - but Im not sure I understand fully the maths why.
Is the larger exit pupil going to result in a better / brighter / more successful view?
Or will the view be 'roughly' the same ?
Or have I got it all wrong.....
By LR Watanabe
Okay, I'll try to make this as short as possible.
Info: I have a EQ5 mount (soon to become motorised and GOTO'd) and, after reading countless astrophotographers praise the QHY PoleMaster, I thought it'd be a good idea to follow in their footsteps and buy myself a PoleMaster.
I saw nothing about the PoleMaster supporting the EQ5, so I thought I'd ask whether or not the PoleMaster would make my life easier by supporting the EQ5.
Posting in this forum after too long!
One of the first attempts at taking photos of the moon.
All photos taken using skywatcher 90mm refractor with eq2 mount, Nikon DSLR and 2x Barlow here and there.
Basic editing in cellphone.
Thank you! Suggestions highly appreciated!