Tufty Posted November 13, 2022 Share Posted November 13, 2022 Hello, I joined today, said hello in the hello place and now here with my first bucket of questions for experts here! Not sure how my interests will develop, but currently starting to work through an astronomy 'practicals' book. A lot of section 1 is taken up with the celestial sphere and circumpolar charting etc. And I've gotten interested in this, so I am moving towards looking at starfields and identifying stuff I can see with binos and hopefully a SW Equinox 80 (f6.25). So, I have this 40mm EP which amazed me when I put it in the Equinox, but the exit pupil is 6.4 (btw I'm learning all this stuff at the same time and have only a vague idea what I'm talking about) - this may explain why I can see something amazing as I hover over it, but can't get inside the EP, or too close to the image. I put the same EP in a 5" f9.4 achromat and it was still pretty amazing with exit pupil of 5.3 which I can cope with (if I understand it, I can get into the EP and the image gets on my retina), but I'm not so good at yoga that I can do zenith and circumpolar stuff with a refractor as big as me, and FOV seems to reduce. So, what are my options? 1. I have a ES 68 deg 24mm which is very nice, but I want a larger fov. 2. Is there any point in trying to extend the focal length of the Equinox to reduce the exit pupil? That also will reduce fov anyway?? 3. Just go for a 30mm with exit of 4.8 ? or, 4. Go for one of those 82 deg ESs?? Any other good combinations EPs and whatnot with f6.25 80ed doublet for detailed wide starfields (and some DSOs hopefully)? I'm prepared to go to 2" eyepieces if I can get anywhere near the experience this 40mm looked to give me. I have a 2" diagonal in a box somewhere. Thank you for reading! Quote Link to comment Share on other sites More sharing options...
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