I'm keen to find out what you guys think would be a better EP than the Andrews 30mm UWA 80 degree EP. I have a F5 dob and I don't really like the level of aberations in the Andrews EP.
I havn't bought any EP's yet (I still have the basic GSO possls which came with my dob) but I think the Andrews EP is a bit expensive if I'm just going to want to upgrade latter.
I have thought about the Stratus 30mm but it only has a 68 degree field.
"... but it only has a 68 degree field." - geez talk about a bad case of FOV gluttony. If you want an ultrawide around 30mm that works well at f/5, you're going to have so spend considerably more than $350. The 28mm UWAN is one of the least expensive options around but even that is closer to $500. The 30mm "Andrews" aka 1rpd will give you only about 60 degrees of usable FOV.
haha I love the emersed feeling. But I also like a well corrected image.
I am a photographer and I notice poor image quality quickly and it does annoy me. So perhaps a 30mm Stratus would be the better option. I have been quoted $245 for one of these 2" Stratus EPs from bintel.
I could always remove the bottom section and then barlow it in a UO 2" barlow (which I plan to be my second purchase).... This would then give me a wider FOV?
I'm keen to find out what you guys think would be a better EP than the Andrews 30mm UWA 80 degree EP. I have a F5 dob and I don't really like the level of aberations in the Andrews EP.
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Hi Dave
You'll have to spend upwards of $1000 for a 31mm Nagler to improve the edge performance in an F5 . At 40mm field diameter the coma and astigmatism is getting severe. But then the field of view is great, I recommend putting a cardboard mask with 7.5" hole over the front , not as much light but the Andrews 30mm will be much sharper at the edge and you'll gain all that extra sharp field at effectively F7.
If you want an ultrawide around 30mm that works well at f/5, you're going to have so spend considerably more than $350. The 28mm UWAN is one of the least expensive options around but even that is closer to $500. The 30mm "Andrews" aka 1rpd will give you only about 60 degrees of usable FOV.
