10" F/4.7 Modified Skywatcher Reflector, 38mm Orion Q70, 17mm Modified Ultima LX, 10mm TeleVue Delos, 7mm Pentax XL.
15" f/5 Tectron
Mallincam Junior Pro
TMB 40mm Paragon,Leica ASPH zoom,
WO binoviewer w/assorted pairs
"Yeah, well, you know,that's just, like, your opinion, man."
Quote:I really like the 14 Pentax XW except in my f/5 12.5" scope at a dark site, the field curvature is pretty obvious. I wonder if anyone has had a chance to compare it to the 14 Delos.
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
SyedTeeter 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
"Great men are forged in fire. It is the privilege of lesser men to light the flame." --John Hurt, as The War Doctor12" f/4.9 Skywatcher Collapsible Dobsonian8" f/4.9 Orion Newtonian on alt-az mountOberwerk 15x70 BinocularsMinimalist Eyepiece Collection: 30mm ES-82, 22mm Vixen LVW, 14mm Delos, 10mm Delos, 7mm Pentax XW, 2X GSO 2" ED Barlow, 3X Explore Scientific Focal Extender, 4X Powermate
Quote:I really hope the 14mm Delos is what everyone else expects--just as sharp as an Ethos, just with 72-deg AFOV, more eye relief, and little/no field curvatureI know what I'm about to say this isn't going to please a lot of Pentax users, but here goes--I don't quite understand why the 14XW and the 20XW were released at all at full price given their field curvature. Yes, they've got great transmission and contrast, but field curvature to that magnitude is inexcusable for the price they command.Sure, a Paracorr cleans it up. But a coma corrector shouldn't have to clean up anything *but* coma if you need three Benjamins to take home a 70-deg eyepiece.It's mysterious that, among eyepiece lines where certain focal lengths are better than others, that the "dog" in the line-up is often in the ~14mm focal length (e.g. Meade 5000 UWA, ES-82, Pentax XW). That is a *critical* focal length if you've got a Dob. Your "clutch"/"money" eyepiece, for lack of a better term.Clear Skies,Phil
Quote:I know what I'm about to say this isn't going to please a lot of Pentax users, but here goes--I don't quite understand why the 14XW and the 20XW were released at all at full price given their field curvature. Yes, they've got great transmission and contrast, but field curvature to that magnitude is inexcusable for the price they command.
Time spent looking at the stars is added to your life
Bashful, Misty, and little Ralphie - my heavenly stars
A-P 105 Traveler ~ TEC 140 ED ~ TEC 6 MCT
A-P Mach1 GTO ~ Losmandy GM-8 ~ TV Gibraltar
10" OO VX, 6" iOptron Mak-Cass, Orion 100ED
Quote:I know what I'm about to say this isn't going to please a lot of Pentax users, but here goes--I don't quite understand why the 14XW and the 20XW were released at all at full price given their field curvature. Yes, they've got great transmission and contrast, but field curvature to that magnitude is inexcusable for the price they command.Sure, a Paracorr cleans it up.Clear Skies,Phil
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:Field curvature though is different than say, pincushion. Younger eyes can usually accomodate for quite a bit of field curvature, and then most people start to gradually lose their range of accomodation as they get older. So while some people will always argue that it's not so bad for eyepiece X, it's a very real issue with many people.
Quote:To me, it's not the just the price the 14XW commands. Rather, it's that it was released at all given its level of field curvature. For a 70-deg eyepiece that commands around $300 new, that's a pretty serious flaw having an eyepiece that a lot of folks can't bring into focus throughout the entire FOV.Clear Skies,Phil
Kmart 40mm-Thanks Mom|Jason60mm-Thanks Dad|C80SS-Thanks Wife|C90|C102|C6XLT|AP130EDFGT|C-11XLT EQ-2|EQ-3|CG5GT|Mach 1 & Eagle "For once you have tasted flight, you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return".-Leonardo da Vinci "We're all in the gutter, but some of us are looking at the stars."-Oscar Wilde ~RIP Dad, you were my best friend...Godspeed!~
Quote:I think alot of people miss the point of XW eyepieces..." The XW series lenses are 1.25-inch, telescope eyepieces designed for Pentax’s 65-, 80- and 100-mm ED spotting scopes. These versatile lenses are made with the same ED glass as the scopes themselves to provide high-resolution images."It just so happens they are darn good in other astronomical scopes. The Delos had better beat them for the money they command IMHO!
Jeff Morgan - Wile E. Coyote School of Telescope Making
Meade 305 ƒ/10.4 LX200 • Royce 250 ƒ/19 Dall Kirkham • AstroTech 250 ƒ/8 RC • AstroTech 250 ƒ/4 "RFT" Newtonian • Meade 80 ƒ/6 ED APO • TEC 140 ƒ/7 APO • Orion 180 ƒ/15 Mak Cass ... Denkmeier II binoviewer - Nikon 8x60 binocular
Astronomical Files from Black Oak Observatory
Happy owner of--
A Mag 1, 12.5 inch Porta Ball
A Dual Axis Equatorial Platform
A PST Double Stack
Quote:Perhaps I should consider the 13 T6. It is a lot lighter than the XW (important for my collapsible 6" f/5 newt) and I have not heard any complaints of edge distortion. Eye relief is tighter, but still adequate.
Quote:The 14 and 8 will be available soon, per a call to Astronomics.
18" f/4.2 homebuilt truss 12.5" f/6 hybrid tube dob
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