... Dale over at DBA carries them: http://www.dbaastronomy.com/GSO%20EP's.htm You may be able to find them a couple of dollars cheaper somewhere else, but Dale...
... tried ... 2.3X ... found ... eyepiece. ... focal ... field ... of ... field ... of ... focal ... yields ... the ... 2.3. ... are ... divide ... the ... you...
... The exact amplification of a Barlow depends on a lot of issues, including the physical and optical design of the eyepiece you use it with and where the...
I hope you all don't mind a stupid question from a beginning astronomer... When I calculate the TVOF for a certain eyepiece that I'm using, is the result in...
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... Same answer as always, Emory....no stupid questions ;-) ... If you time the transit in minutes and fractions thereof, you multiply by 15 to get the...
... If you are doing a "theorhetical" calculation based on FOV of the EP and Power, then you'll get results in Degrees because that is what the EP FOV is...
... the ... That is correct sir! The discussion lately has been about timing star transits and figuring barlow magnifications, so that's where my head was (no...
... Bah! No one calls me a gentleman and gets away with it!!! Furthermore, I'm not FROM the south, but rather, am being held HOSTAGE in the south! My spirit is...
... Yup - that is a DANDY of an OC! Certainly in the top 10. Point it at some of the OC's in the Puppis/Canis Major area if you've got a clear southern horizon...
you were right. I checked myself and came up with 1.1 Thanks!!! so I think I might have entered in the wrong magnification the first time...oh well, live and...
The EP I was using was the standard 25mm supplied with the telescope. I'm sure all of you with experience knows that with that EP the FOV isn't nearly enough...
The EP I was using was the standard 25mm supplied with the telescope. I'm sure all of you with experience knows that with that EP the FOV isn't nearly enough...
... Your 8" has a 2" focuser on it, right? If so, you need to read this: http://rapideye.us/astro/LPEPSO.html Lots of other people on this list have had...
Yes, the 25mm definitely doesn't do justice to m45. I'm on a search for an affordable widefield eyepiece as well. Let me know if you end up getting one and how...
From: "jrbcupertinopetaluma" <james.barnett@...> ... That's an important point. Normally one would expect the eyepiece with the larger field stop to...
I'm a bit confused about minutes of arc and degrees. I have calculated my AFOV with a 25mm eyepiece to be 1.1 degrees. However, m37 has a diameter of 24 arc...
From: "eblake00" <ejblake@...> ... No, you're making it more complicated than it is. Actually there are 60 arcminutes in one degree. So that's why M37...
... are your FOV. ... Jack explained exactly the relationship between arcminutes and degrees. It is a constant, like 12 inches in a foot. Taking it one step...
Now I think I'm just more confused...and I'm sure it's NOT your fault, I'm just new here and I really want to understand this...I'm sure I am still making it...
Arc minutes do not mean minutes, and arc seconds do not mean seconds (time measure). They are just sub-divisions for degrees. If the sky "moves" 15 degrees in...
... Arcminutes (and arcseconds) are a measure of angle rather than time. A circle is divided into 360 degrees. Each degree is divided into 60 arcminutes, and...
AH! I think you've hit onto something! I'm starting to see the light...anything else you can fill me in on to help would be great. Thanks Ant! - Emory ... ...
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