MarkLeica 8x20; Nikon Action 7x35; Vixen Apex Pro 8x42; Orion 15x63; Docter Nobilem 15x60WO Megrez II 80 FD / APM 107mm f/6.5 / Mewlon 210 on DM-6 + Berlebach Planet
Scopes & Stuff:
16" F5 Teeter/zambutoTom Osypowski equatorial platform10" F5 LightbridgeMid 70's RV-6Orion 100mm EDATMing:Low Profile Front Collimating Dob/Cell for 16" Conical MirrorFront Collimating Dob/Cell for 16" Standard MirrorDob Driver with novel azimuth friction clutch, and axial (rotating) electrical connection.Red Oak Observing PlatformRed Oak Combination Observing Chair (Post Pending!)
Orion xx14g Dob CPC 1100 w/Skywatcher 80ED piggybacked Coronado PST TMB 92L refractor AT Voyager mount Nexstar 6/8 mount Denk Big Easy binoviewers Oodles of eyepieces and other optical gadgets Past scopes Meade 8" reflector and 8" SCT
Quote:JohnI have heard this about the XWs over and over again. I since wondered how the TV Delos stack up against them.Joe
The opinions expressed herein are solely mine as an amateur astronomer hobbyist & consumer. Information herein was correlated from experience, discussions with others, & research from multiple sources freely available at time of posting. All reasonable care & skill was used, but no warranty is made as to accuracy, & liability cannot be accepted for errors/omissions. This is for information only and not intended nor implied to be a substitute for professional advice.
My eyepieces are made from the waste product of exploding stars.
10XTi 102XLT ST80A(2" Focuser); President, Eypieces Anonymous, Denver Chapter (Hello, I'm an eyepiece junky, what's your excuse?)
DAS Dark Site
Skywatcher BD 180mm f/15 Mak Intes M703 180mm f/10 Mak ED102 f/7 refractor Vixen LVW42, 22,13,8,5 and Vixen LV50
Quote: For planetary you don't need a sharp field more than a few minutes of arc. Lowest number of air-glass surfaces and/or elements is the way to do this.#1 Spherical ball. Just two surfaces.#2. Monocentric, three cemented elements. Steinheil was first, TMB revived the idea.#3. If anyone made a modern one with coated surfaces, a Ramsden or Huygens. 2 elements, 4 surfaces. but there's no such beastie. #4. probably a tie between good orthos, RKE (3 elements, 4 air-glass surfaces) or Kellner.
"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:Super crisp, but suffers from lateral color and ghosting. They do, however correct for false color in long achromats.
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:7XW, but I must admit, the NLVs are very nice too.
Orion Optics 14" f/4.5 Orion Optics 10" f/6.3 Research Grade lambda/10 Orion USA 10" f/4.8 Equatorial Reflector EQ6 Skywatcher 120 ED Coronado SolarMax 60mm Skywatcher 80 ED + Herschel wedge Radians ,Pentax XLs, Orthos , TV plossls , Hyperions...and many others to experiment with.
Quote:Does anyone know what TMB Supermonocentrics are available from Markus currently?
Quote: For planetary you don't need a sharp field more than a few minutes of arc. Lowest number of air-glass surfaces and/or elements is the way to do this.#1 Spherical ball. Just two surfaces.
Quote:I've not had the pleasure of using a Delos as yet but from all the reports I've read I believe the two types are very, very evenly matched in performance.
Jeff Morgan - Wile E. Coyote School of Telescope Making
Quote:Perhaps relating the market trend towards wide field, "glass heavy" designs, many of the favored high end planetary EPs are no longer being produced (Zeiss, University Optics HDs, Baader GOs, Pentax SMC XOs, etc.). Curious, therefore, to hear opinions are as to best planetary EPs in current production.JoePreemptive post script: Clearly the above question, as I have raised it, is fuzzy. That is, planetary EP optimization varies with variables such as focal ratio of scope, driven vs undriven mount, need for eyeglasses etc. As such, my hope here is to generate discussion, rather than to definitively answer a somewhat vague question.
Refractors Reflectors Two Cats A few eyepieces
Quote: Sieberts are junk cause he doesn't have access to hi-quality coatings.
Quote: Thomas have you or someone you know tried using these doublets as eyepieces ???
Quote: Yea, throw them in the trash. Send it to me, I have some other junk pre war Zeiss stuff.
Quote:Perhaps relating the market trend towards wide field, "glass heavy" designs, many of the favored high end planetary EPs are no longer being produced (Zeiss, University Optics HDs, Baader GOs, Pentax SMC XOs, etc.). Curious, therefore, to hear opinions are as to best planetary EPs in current production.
SteveC TEC 140 Intes Micro 715 deluxe TEC 110 SolarMax 40 Losmandy G-11 w/Gemini, CGEM, Vixen Skypod TEC EP Turret, AP Maxbright, Denk P/S Diagonal, Denk II B/V, EarthWin P/S Slide TMB Supermonos, ZAO IIs, Zeiss Monocentrics, Naglers, 24mm Panoptics, 14mm Meade UWA, 5mm Pentax XO, 20mm ES100, and 2.9mm, 4.4mm, 5.9mm, 7.4mm Couture (ball)
Quote: Inevitably, some respected observers, will comment that all modern eyepieces are equal in on-axis performance.
Quote: The Pentax XW and Delos are equal to the Zeiss II's on the planets...
"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: Quote: Inevitably, some respected observers, will comment that all modern eyepieces are equal in on-axis performance. That is absolutely not true, in my experience. Not that someone might not say that, but that all eyepieces today are of similar high quality. That is simply not true. Personal example: My 9mm ES100 is a little bit sharper on-axis than my 8.8mm ES82. The 8.8mm ES82 is on par with the 9mm UO ortho (okay, not made anymore, but made until recently, so still "modern"), but the 9mm ES100 surpass both. Clear skies!Thomas, Denmark
Quote:By the way, the NLVs are a bit brighter than the old LV series , which I used to have too.Still looking for a used NLV 4mm , but I haven't been able to nail one though George
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Scopes: Celestron 9.25, Orion 80MM and 120MM EON Apo
Solar: Lunt LS60THa/PT/B1200/50DS
Binos: Canon 15X50 IS Mounts: CGEM and LXD75
Eyepieces: Explore Scientific, Meade & TeleVue
Camera: DMK 41, Canon 6D, SBIG STT-8300
Messier Certificate # 2508
My Images: http://www.astrophotogallery.org/u342-hfjacinto.html
Quote:Quote:By the way, the NLVs are a bit brighter than the old LV series , which I used to have too.Still looking for a used NLV 4mm , but I haven't been able to nail one though George I wonder how an NLV 4mm would compare to a Radian 4mm?Mike
Quote:Then I remembered had one more 6mm- the new Delos. Popped it in and there was the 2nd red spot, and it even showed some color to it. Less lens count does not mean more detail seen. Quality is quality and you usually gotta pay for it.
Cactus Patch Observatory / 14" LX200
"The four points of the compass be logic, knowledge, wisdom, and the unknown. Some do bow in that final direction. Others advance upon it. To bow before the one is to lose sight of the three."