ROR Observatory Levenhuk 8" carbon fiber RC, Astro Physics CCDT67 Astro-Tech AT8IN w/Moonlite, Baader Mark III MPCC Levenhuk 80mm triplet, Astro Tech 0.8X reducer/flattener Celestron CGEM DX w/HyperTune STF-8300M SX 7 position 36mm CFW Astrodon 5nm H-alpha Little Piney Observatory
-- Matt -observing since fall 2012 16" F/4.5 truss DOB / EON 120mm ED / 10" F/5 strut DOB Paracorr (T1 tunable),telrad, RACI finders, AltAz Tripod mount ES 82° 4.7,6.7,8.8,30mm AT Paradigm 60° 25,18,12mm Pentax XW 70° 20,14mm , Baader zoom observing list/notes.. beginning dslr astrophotos (moon/widefields)
Quote:Ok-- One baby step at a time here. I received a Meade zoom eyepiece(8-24) for my Dob 6". I wanted to play with different fl eyepieces to see the difference. (still too cloudy and rainy to actually look at stars!). At 24 the fov is fairly wide. As I get to the 8mm it is very narrow-- which seems understandable. My question is--if i get a stand alone 8mm (or thereabouts) will the fov still be very narrow? Does a Wide fov eyepiece help correct that?Just askin (before I spring for single eyepieces)
Quote:Any thots on the difference between a 1.25 and 2" eyepiece? More important at low magnification or hi?
Quote:Okay, please help me understand this. The only purpose for a 2" eyepiece is to allow for a larger AFoV? If you had a 32mm 1.25" and a 32mm 2" with the same AFov (say 52*) there would be no difference in the TFov or the quality of the image (provided the same optics), is that correct?
Quote:There are many, many threads and posts about measuring afov, tfov, field stops etc. Given that this is the "Beginners" forum, I wonder if a discussion of the fact that things get questionable around the maximum field stop might be better left for later.The gist of the o.p.'s post is correct, which is that if two eyepieces have the same specs except that one is 2" and the other is 1.25", then the views (tfov and magnification) will be the same.
A man is a small thing, and the night is very large and full of wonders.
Quote:Of course, you might like to strike a different balance.
Quote: Quote:Of course, you might like to strike a different balance. Exactly.I figure that most do a web search first before getting up the courage to post a forum like this and need someone to help them figure things out. There are many excellent webpages but Cloudy Nights takes it a step further and provides us with the opporunity for "face to face", personalized contact. Ideally, everyone would have an knowledgeable, experienced friend to help them out, show them the ropes. Unfortunately, this is a small hobby so most don't have that special friend. My goal is to try to fill that void. Jon Isaacs
Quote:My goal is to try to fill that void. Jon Isaacs
Clear skies, Scott my scopes: a few refractors (50-102mm), 2 Newts (4.5-12"), and an 8" SCT
Quote:Ideally, everyone would have an knowledgeable, experienced friend to help them out, show them the ropes. Unfortunately, this is a small hobby so most don't have that special friend. My goal is to try to fill that void.
Quote:I'm a math helper at a local K-6 school, and increasingly I find myself motivated not to teach math facts, but rather to give kids the tools and encouragement to teach themselves.... "help me" is not a question.
We mostly come out at night... mostly.
GSO Z8 Degree Circle & Digital Level
Celestron 4"(102mm) SLT 660mm f/6.47
2" 30mm GSO WideView
9mm GSO Plossl
ES 82's : 4.7mm, 8.8mm, 11mm, 18mm
BGO's 5mm, 6mm, 9mm
2" 2X ED Astronomics Barlow & GSO 1.25" 2x Shorty
8-24 Baader Zoom III
Baader M&SG, Semi-Apo
Quote:What's missing from your take on this is one never knows just when someone else reaches that Ah-Ha moment. When then say to themselves "How stupid I was. I get it." And I'd hate to think that it wouldn't happen to someone around here sooner rather then later because "help me" isn't allowed.
Quote: Maybe, or maybe rewarding "help me" makes it happen later, if at all? Just to be clear, I'm not saying that anything is or isn't "allowed", but rather am suggesting that instead of everybody responding to these kinds of "help me" questions with their own opinions about what somebody else needs/wants/oughts, that folks instruct and prompt the questioner in ways that produce better, more knowledgable, and more directed questions.