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Subject: Re: vote by xxx.xxx.90.89 By: Live_Steam_Mad In Reply to: Anonymous (xxx.xxx.90.89) (Original Vote) Date: 07/31/2014 02:44:17 pm PST >I find the apparent field of only 43 degrees a bit tunnel-like 43 degrees? TeleVue themselves list this as having a 50 degree AFOV. I think you may be talking about the TeleVue 40mm Plossl? Subject: Re: vote by xxx.xxx.80.117 By: Live_Steam_Mad In Reply to: Anonymous (xxx.xxx.80.117) (Original Vote) Date: 08/31/2014 07:59:12 pm PST >I bought this eyepiece more as a curiosity because it is as much as you can get in a 2in format. There is no field stop! It gives me 51x with a FOV of 1 degree in my C11!! That's as low as I can go without a focal reducer. After using 65+ degree EPs on a regular basis, it is a little claustrophobic to use. It does give sharp, contrasty views, though. I put this one down a speciality EP for affectionados. You can get the almost the same FOV with the 35 Panoptic + larger image scale. Don't use it much, but it stays in my permanent collection. When you say this TV 55mm PL has no field stop, it sounds like it is simply vignetting at the edges. For example I have a TV 32mm Plossl (bought in 2012 approx) with a sharp black field stop, however when I put it in my C11 I find the eye lens height a little too low, so I end up unscrewing the bottom of my Barlow lens part from my Relevation (GSO) Barlow and then use the Barlow tube as an extension tube which brings the ep to the correct height, BUT the tube has a restricted opening to accept the Barlow lens element section, which causes the 32mm PL to vignette around the edges and create a "new" blurred "field stop" inside the original one (I can still see the original field stop if I look carefully). Sounds like your 2" SCT adapter on your C11 (the 3.25" to 2" step down part, like mine) has an opening which is less than the 55mm's 46mm field stop and is causing a blurred edge to appear? Please check this and confirm it for me? Another way of confirming this is for me to ask, does the 55mm have a sharp black edge to the circle of light that you see when you look through the ep with no 'scope and no diagonal? BTW you can get a clear 2" aperture by using the "Astro Physics 2" Visual Back for Celestron 11" & 14" SCT" or "Baader 2" Clicklock Adapter for 3.25" SCTs". Make sure to get the Celestron 3.25" not Meade 3.25" thread! They use slightly different threads! Page 1 of 1 | ||||||||
