Jeff -----TEC 140, Stellarvue SVR90T, SV115T20 and AT65EDQ refractors,Webster D14, C11 EdgeHD Lunt LS60THa solar scope double stacked with LS60FHaTelevue Pan 41; Ethos 21, 17; Nagler 31T5, 9T6, 7T6, 5T6, 3.5T6; Delos 10, 12, ES25, 14, 9Astro-Physics 900GTO with Rob Miller Tri36M TripodDM-4 Mount-Extension-Tripod w/ Sky CommanderDM-6 Mount-Losmandy Adapter/Extension-Berlebach Planet w/ Argo Navis
Quote:Well, since Astronomics was out of stock on this eyepiece I went to AgenaAstro and added it to the cart. While I was there I added the ES100 9mm and the Paracorr 2. I then clicked checkout and that came to $1370 before shipping. I then decided I would rather not get divorced just yet so I closed the tab... Oh well... Darenwh(Still happily married)
Rob 18" f/4.3 Starmaster 8" Meade LX200 Classic Celestron 15x70 Skymaster Binoculars
Quote:It has arrived. Here it is with some friends. It isn't the widest or tallest of my eyepiece collection. It may be the heaviest.
Celestron AVX mount Old Meade 8" LX6 F6.3 Meade 80mm 6000 APO
Quote:Not even close to being parfocal with the ES 100 9mm or any other 2" EP, needed a lot more in focus!
Equatorial Newtonians, 20" and 14" "The purpose of life is to be defeated by ever greater things." - Rielke
San Jose Astronomical Association, Director for Quick STARt Program, Docent at the Open Space Authority Custom Dobstuff 17.5" f4.5 Truss Dob, Orion XT8 8" Dob, ES AR127 Refractor, Orion Deluxe 100mm Refractor, EZ Touch Mount/Tripod, Zhumell 20x80 binos w/UA Unimount, and a ton of eyepieces.
Quote:Is there any noticeable fall-off in brightness near the edge? One post in this forum claimed that it is impossible to create an eyepiece with these specs in a 2-inch barrel without some loss of light at the edge.
Quote:We have several photos and some additional specs up on our website.http://agenaastro.com/explore-scientific-100-deg-series-eyepiece-25mm.html
Scott my scopes: a few refractors (50-102mm), 2 Newts (4.5-12"), and an 8" SCT
Quote:Quote:Is there any noticeable fall-off in brightness near the edge? One post in this forum claimed that it is impossible to create an eyepiece with these specs in a 2-inch barrel without some loss of light at the edge. There is a drop off visible when looking through the eyepiece at the sky. It certainly doesn't appear to be severe, and it is confined to a fairly small ring near the edge.
Quote:I notice the example I have doesn't have a sharply-focused field stop and has a blue ring around the edge of the field near the edge.Any of you see the same thing?
Quote:>>How big is the eyelens? Any photos? 33mm (1.3"). We have several photos and some additional specs up on our website.http://agenaastro.com/explore-scientific-100-deg-series-eyepiece-25mm.htmlRegards,Manishwww.AgenaAstro.com
22" f/4 Sayre Monocular Tom Osypowski Equatorial Platform (since 1995) Assorted small telescopes, 76-152mm; 25mm ES100°, 20mm ES100°, 13mm Ethos, 9mm ES120° (serial #18), 9mm ES100°, 8mm Delos, 6mm Ethos, 4.7mm Ethos, 3.7mm Ethos SX, 2.5mm Nagler Type 6, 2" 2X Powermate, 2" 1.5X Proxima Barlow, 2" GSO Coma Corrector, 18mm BCO, 10mm BCO, 6mm BCO and other 1.25" eyepieces. Zhumell 8x42 Nova Phase-coated ED Binoculars Burgess 25x100 Binoculars
Quote:Quote:I notice the example I have doesn't have a sharply-focused field stop and has a blue ring around the edge of the field near the edge.Any of you see the same thing? Maybe your eyepiece does not have field stop, like one ES9-120 reported to be 140 degrees?Jochsner mentions clean and sharp field stop.
Quote:Another way to approximate the Field Stop is to multiply the eyepiece focal length by the apparent field, and divide by 60. There is also the Field Stop Calculator which produces an estimate of 40.8 mm for this eyepiece.
Fred StarStructure LE Series 18" f/4.3 (Zambuto & Nexus/ServoCat/Skytools3 Pro) Celestron 8" SCT w/Starlight Feathertouch Microfocuser; Celestron 102mm f/9.8 refractor Stellarvue SV80ST f6 Triplet APO Tele Vue & EarthWin binoviewers Enough Eyepieces and Accessories to put my Scopes to Good Use Free-Turn Q HalfHitch, CG5-ASGT(2), Astro-Tech Voyager mounts
NP-101 on a DM-6
Teeter 11" STS/Waite Mirror
Zeiss, Fujinon, Nikon, Vixen binoculars
Quote: Since I have the 31mm Nagler, I don't even have to think about the ES 25!
"You're not afraid of the dark, are you?" - Riddick "The best scientists are humble. They seek to understand, not to ensure their legacy, but merely to understand." - Mori
Quote: Quote: Since I have the 31mm Nagler, I don't even have to think about the ES 25! Maybe not and maybe yes. I don't think the reason to get a 100° eyepiece should be to get a bigger true field, but to get a bigger true field in that given focal length. I can personally attest that the increase in apparent field of view can be most impressive and clearly worth upgrading to, if you can afford it. I couldn't so I went with some 82° ES eyepieces, since I could get three really useful focal lengths for the price of one 100° eyepiece. But I'd still like to have a couple 100° eyepieces. They sure are intoxicating, much like binoviewers.Clear skies!Thomas, Denmark