The_bluester
12-01-2012, 10:17 AM
OK, I have posted a similar thread a while back but did not ask this question explicitly.
As per the thread title, I have a C 9.25 based scope (CPC 925 GPS) and I may be in the market for a premium widefield EP in the next couple of months. I posted up recently asking about what sort of field stop diameter I would get away with in that scope (Which has 2" threads for the visual back and about a 46mm ID baffle tube) Suffice to say that it should be able to stand up to roughly a 40mm field stop without vignetting away the wider field the EP would be capable of. I got a 2" SCT quartz dielectric digonal for Christmas so now I can use the bigger format EPs.
What I am looking for is any direct experience of widefield 2" EPs from users of the C 9.25. What works well in the F10 scope? Is a Nagler 31 a stunning thing or is it an expensive waste as it does not suit the scope well, is not as sharp as another design in the scope, not well corrected at the edge etc. I have a handful of Televue EPs and am quite happy with them but if there is another option I should look at I would certainly do that rather than slvishly following a brand, no matter how well known.
What have people got in these things in the 2" format with field stop diameters that are not possible in a 1.25" EP? I would like to stick to a larger AFOV, something approaching the 82 degrees of a Nagler.
As an aside, I do have one gripe against one of my TV EPs, an 11mm Nagler T6. The blackouts and kidney beaning I can live with, once you get used to that it is reasonably straightforward to keep the eye in the right spot, but is is very prone to fogging internally and the only option once it does is to take it inside and carefully unscrew it into the three main assemblies (So as not to have any glass fall out) and let it clear up. It sometimes fogs before the SCT corrector plate does. I know that a corrector plate heater with an EP heater incorporated would fix that but that is money I don't have to spend right now.
As per the thread title, I have a C 9.25 based scope (CPC 925 GPS) and I may be in the market for a premium widefield EP in the next couple of months. I posted up recently asking about what sort of field stop diameter I would get away with in that scope (Which has 2" threads for the visual back and about a 46mm ID baffle tube) Suffice to say that it should be able to stand up to roughly a 40mm field stop without vignetting away the wider field the EP would be capable of. I got a 2" SCT quartz dielectric digonal for Christmas so now I can use the bigger format EPs.
What I am looking for is any direct experience of widefield 2" EPs from users of the C 9.25. What works well in the F10 scope? Is a Nagler 31 a stunning thing or is it an expensive waste as it does not suit the scope well, is not as sharp as another design in the scope, not well corrected at the edge etc. I have a handful of Televue EPs and am quite happy with them but if there is another option I should look at I would certainly do that rather than slvishly following a brand, no matter how well known.
What have people got in these things in the 2" format with field stop diameters that are not possible in a 1.25" EP? I would like to stick to a larger AFOV, something approaching the 82 degrees of a Nagler.
As an aside, I do have one gripe against one of my TV EPs, an 11mm Nagler T6. The blackouts and kidney beaning I can live with, once you get used to that it is reasonably straightforward to keep the eye in the right spot, but is is very prone to fogging internally and the only option once it does is to take it inside and carefully unscrew it into the three main assemblies (So as not to have any glass fall out) and let it clear up. It sometimes fogs before the SCT corrector plate does. I know that a corrector plate heater with an EP heater incorporated would fix that but that is money I don't have to spend right now.