AS of NSW
AS of Hunter Valley
Fact: I like reflectors and big ones. All the refractors I own are either finderscopes, binoculars, or riflescopes.
18"/F4.5 Obsession #1333 fully optioned (OMI Optics)
14"/F4.5 SDM #33 fully optioned (Zambuto Optics)
10"/F5.3 SDM #50 fully optioned (Suchting Optics)
Pentax XW's, T4 & T5 Naglers , UO HD orthos, 6mm Delos, 8mm Radian, 8.5mm Pentax XF, 13mm Ethos. 12mm Celestron Illum Astrometric eyepiece. Rainbow Optics Spectroscopic Eyepiece Set. Orion Optics UK 250 lpi Ronchi grating eyepiece. 2" Astronomiks UHC, OIII & H-Beta filters, 2" DGM Optics NPB filter. 2" Variable Polariser. 2" Hoya colour filters.
Leupold 10x42 & Pentax 16x60 binos.
Rodger EON 80 Tak TSA-102 EON 120 Orion Apex 127mm Meade AR6 Tak FS-152 Celestron Nexstar 6SE and 8SE Celestron 9.25" SCT Meade 10" LX50 Celestron 11" SCT Celestron 14" SCT 16" Teeter/Zambuto 20" f/5 Obsession Classic Zeiss Conquest HD 10X42 Astro Physics Premium 15X70 Oberwork 20X80 Deluxe III Oberwork BT 100-45 Complete set of Baader Genuine Orthos Zeiss Diascope eyepiece 12mm, 68AFOV, Great eye relief (sharpest, highest contrast eyepiece I own, just awesome) etc., etc.
10" F/4.7 Modified Skywatcher Reflector, 38mm Orion Q70, 17mm Modified Ultima LX, 10mm TeleVue Delos, 7mm Pentax XL.
-DannyMy warehouseMy Channel
Blog: Astronomy & Living by Hernando
Quote:If this plastic disk is merely the field stop, and is not doing double duty to hold the eyepiece together, that by itself should not put one off. But if it too easily falls off, that's not good.
Quote:I don't pay $300 plus for any eyepiece with plastic rings that come adrift.
Tak TSA120 Tak Sky90 Tak EM10 and QuarterHitch Mounts Pentax and TV EP's
Quote: Quote:I don't pay $300 plus for any eyepiece with plastic rings that come adrift. with tax and shipping it's closer to $400.a plastic baffle to hide the smallest abberation that only if you knew what to look for you could find it. it must show up on planets and the moon because of their brightness. boy now I'm wondering what it is...
My eyepieces are made from the waste product of exploding stars. 10XTi 102XLT ST80A(2" Focuser) XW: All; XO: 2.58 Televue: Naglers-T1 Smoothside-full set, 17T4,12T4,Ethos 17,4.7; plossels-40,32,20,17,&7.4mm; Pans-22,24mm; Delos-6,8,12,17.3mm ES100: 5.5,9*,14,20 ES82: full set ES68: 16,20,24,34 NLV: 5,9,10,15 Ortho: HD-7,9; OPS-9,12 Meade RG 7mm Other: Pentax 12.5K(.965), 10mm Parks Zoom: Nag3-6 *=on b/o DAS Dark Site
Quote:I have been observing with mine without the plastic disk and it does NOT affect performance at all. In fact, I wholeheartedly recommend the entire Delos series if you want the ultimate in performance in deep sky or planets in any widefield eyepiece.So that is why I didn't "miss" the ring...as I knew the true reason why TV put it there. I wouldn't get hung up by it.This is coming from a Zeiss ZAO-II owner. I use both sets the ZAO-II for the deepest of the deep and the Delos if I need the field.Back at TSP when TV brought the new Delos (14, 12, 8, 4.5 and 3.5), I along with other deep sky crazies played with them with several large telescopes and were very impressed. The telescopes we used...the smallest was a 28" reflector. Here is a short post on this thread.I have the 4.5, 8 and 14 on order.
Quote:I use my 17.3 Delos with a 1.5X Siebert barlow, 2X and 3X TV barlows, 2.5X and 5X Powermates. I can get all the FLs I need from my 17.3 Delos with them. The Delos barlows very well. David
Teeter STS 11 f/4.3 Zambuto | XT8i | XT8g | XLT 150 | C90 | EON 80mmAT Voyager and Nexstar SLT mountsEyepieces: Mostly TeleVue and PentaxDenk II BV'er, Earthwin PFS-SE, Pentax 10x50 PCF WP II
Quote:Maybe 2 great eyepieces and a series of 3 barlows would be a little more versatile of a lineup.
"I have been paddling in the shallows of a great ocean of knowledge." - Sir Isaac Newton * * 15" F4.55 Starsplitter Dob & a Denk II binoviewer * * http://peaceofsky.wordpress.com/ Pacheco State Park Fremont Peak
Quote: In fact, I wholeheartedly recommend the entire Delos series if you want the ultimate in performance in deep sky or planets in any widefield eyepiece.
Ray Teeter 18" f/3.5 Dob D&G 5.375" f/20(?) refractor 天体観測にも威力を発揮する、本格仕様の大口径双眼望遠鏡です。 興和ハイランダー
Quote: Quote:Maybe 2 great eyepieces and a series of 3 barlows would be a little more versatile of a lineup. Well, it all looks so tidy on paper... the real stumper is that Barlows are notoriously variable in their amplifying effects- depending on the EP they're mated with.I was just out yesterday afternoon, a tape-measure hangin' on a streetlight ~80 feet away, trying three different EPs in three diff Barlows, plus NO Barlow. Got x-factors like:TV 2x: 1.95x -to- 2.39xDakin 2.4x: 2.23x -to- 2.61xUO Klee 2.8x: 2.33x -to- 3.07xThen last night (well, 3-5:00 ayem ) i used these same EPs & Barlows to watch the last 25% of Io's dance across Jupiter... spent a nice li'l while fiddling with EP+Barlow combo's until i found the view i liked... whatever the heck its magnification was!Yes, i'd made myself a cheat-sheet of the various combos & their x-factors, as a guide, but this was merely a "guide". But i still hunt-'n-pecked my way thru using my eye... was much more fun than sittin' at a calculator.
Quote: Quote:Maybe 2 great eyepieces and a series of 3 barlows would be a little more versatile of a lineup.
Well, it all looks so tidy on paper... the real stumper is that Barlows are notoriously variable in their amplifying effects- depending on the EP they're mated with.
Quote: All depends where that field stop is located in the eyepiece which is what is doing it.
Happy owner of-- A Mag 1, 12.5 inch Porta Ball A Dual Axis Equatorial Platform A PST Double Stack
Quote:AFAIK, the plastic disc is NOT a field stop--that's further up inside the eyepiece. I believe it was a baffle added to catch a reflection from part of the barrel, probably in Moon viewing. Alvin can confirm that.I think there were a couple eyepieces affected and TV has taken steps to prevent anyone else from ever having that issue.I think the presence of the disc, whatever material it is made from, represents TeleVue's attempt to achieve as close to perfection in the design as they can--otherwise, it would simply have been left off.And Alvin can testify that its presence or absence under dark skies isn't critical, obviously.By the way, most of my Ethos eyepieces have a black plastic disc glued to the bottoms in between the 2" skirt and 1.25" barrel. It's there to prevent reflection back from the bottom of the eyepiece.
17.5" Dob "Beta Version"
NP 127 on a CG-5 and CGEM DX
25x100 and assorted other binos
Naglers, Ethos and various others.