//Anders 8" EdgeHD Skywatcher Equinox 120 Pro 80mm f/6 TS triplet APO
WO Megrez 120 ED on GP Mount
WO ZenithStar 80 ED II on Porta II
10" Meade LightBridge/Paracorr
Orion ED 100 on Polaris Mount
Astro-Tech 8" f6 Dob
Bushnell Ares 5
Meade 226 2.4" f11.7
SpaceScope 2.4" f15
“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
Quote:The NAV-SWs have a cheesy loose screw up eyecup and suffer eyeball glint as bad as any eyepiece I've ever used.
"Life is too short to miss the beauty of heavens."
Quote:I like the XWs much better than my Deloses, too.- Jim
François C8 f/10, lunt 102 mm f/7 ED. SkyWatcher 12" f/5. pentax XW 40, 30,10 delos 14, 8, 6, 4.5. Vixen lvw 22 Brandon 12, 8 TV 2x barlow Closer and closer to the ideal eyepiece collection, but never reaching perfection
Quote:Why is the 12.5 in that picture? ;-)
Quote:Wow Tammy, what an interesting side-by-side comparison! I'm interested to know how well did the Televue 10mm Delos perform against their contenders?
Quote:Tammy, I would be interested to hear how the Tak-10U UW performs in comparison.
Quote:Looks like the Pentax 10 XW will be the next addition to my lineup.best regardsChris
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.
Quote:Quote:Looks like the Pentax 10 XW will be the next addition to my lineup.best regardsChris Hi Chris,The 10mm Pentax XW is one of the very best eyepieces money can buy, at any price. I am sure you will be very happy with it. Any differences with other premium eyepieces at this level are subtle at best and in many cases just personal preference, or brand loyalty. I haven't used any eyepiece in recent years; and I have used a lot, that would in any way make me inclined to sell my 5mm, 7mm and 10mm Pentax XW's, which I have owned for 10 years now.Cheers,
18" f/4.2 homebuilt truss 12.5" f/6 hybrid tube dob
Quote:Having now used both head-to-head in 10mm and 7mm, I prefer the Pentax XWs across the board. The NAV-SWs have a cheesy loose screw up eyecup and suffer eyeball glint as bad as any eyepiece I've ever used. They are quality eyepieces other than that, but these are ills the Pentax lacks, and the Pentaxes are easier to get hold of and cheaper to boot.
I like the XWs much better than my Deloses, too.
Quote:Quote:Why is the 12.5 in that picture? ;-) Hi Steve,If you look at 1.25" nosepiece of NAV HW 12.5 carefully, you find Nikon EiC-10 Barlow lens attached. It is designed for HW 12.5 to make NAV HW 10mm You can look at the full resolution photo.http://www.pbase.com/tammyhomma/image/143754314/original.jpgTammy
Quote:Nikon seems to have bungled the ergonomics part, the eyepieces have a bulky ring that bounces around loose.
Quote:The optical qualitiy of the Pentax XW line is undisputed. But it would be great if Pentax would consider bringing a modified XW version with slightly reduced shroud diameter, which would greatly enhance the binoviewer-friendliness.TeleVue did the same with the Ethos 13mm: Narrowing the barrel diameter from 63.5mm (Version I) to 62mm (Version II) made it more binoviewer-friendly to users with ~62mm IPD.Stephan
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:On the 10SW I found the winged eyecup one of the best things about it.Faces differ and for me this design almost completely blocks external light.gb.
Quote:Tammy your picture is great for comparing the size and visual appearance of all contenders. That strange winged eyecup on the Nikon did not work for me on other eyepieces in the past and the optical issue you mention is a show stopper. My understanding is that this Nikon eyepiece came from the spotting scope side and was modified for astronomical use, that might explain your findings.
Quote:Just curious what scope you used to conduct the testing at F4. I am thinking that the softening you saw in the 10mm Pentax XW in the outer 10% of the FOV could have something to do with the scope / eyepiece interaction.
I do see better edge image quality in Delos 10 than XW 10 with the scope. I don't (can't) see the difference with TMB 92SS f/5.5, or slower. From f/7.5 on, XW 10 and Delos 10 look almost identical to me under night sky.