Lance 1X binoviewer
C9.25 (because 1X just doesn't get it done)
Happy owner of-- A Mag 1, 12.5 inch Porta Ball A Dual Axis Equatorial Platform A PST Double Stack
Wife, kids, dog.Views with glasses: astigmatism and major floaters.Orion StarMax 90mm Mak-CassPorta II45mm 35° | 40mm 43° | 35mm 49° | 28mm 45° | 25mm 50° | 15mm 58° | 11mm 82° | 10mm 50° | Shorty Plus 2xVestil CPRO-800LP observing chairVarious binoculars in the "bang-for-buck" category
Orange tube C-8
Orthos, Plossls, RKEs, ES82s, ES68s
Curator, BSU Observatory www.bridgew.edu/observatory
Orion ED80 - AT Voyager with TNT,pier ext.,Vixon steel tray and Manny's mod.
Omni 120 cg4 with Orion pier ext. and RA drive
Orion XT10(Original F/5)
Jason Constellation Model 311(Modified with 1.25"Crawford Machine focuser & rings)
Binotron-27 (25mm & 17mm Sterlings)
Quote:Now for regular eyepieces, I agree with the OP that it's silly to barlow 2" eyepieces. Love my 1.25" 2.5X Powermate!
David W. Knisely . . . . . . "If you aren't having fun in this hobby, you aren't doing it right." Hyde Memorial Observatory http://www.hydeobservatory.info Prairie Astronomy Club http://www.prairieastronomyclub.org
Quote:The benefit of a barlow, it seems to me, is that it enables you to get high magnification while using eyepieces with reasonable eye relief and good size eye lenses, rather than having to stuff your eye into a pinhole.
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:One of my favorite combinations for globulars is my friend's 20mm Nagler and his 2x Powermate.
Vixen 140mm Neo-achro, 2" AP Maxbright diagonal, 40mm Orion Optilux, 35mm, 30mm, 18mm, and 15mm Ultrascopic/Ultima, 28mm & 20mm ES 68, 19mm TV Panoptic, 5.5mm Meade UWA, 2.4x 2" Dakin barlow (prototype barrel),1.6x Antares barlow.
Dob guy for sure
Quote: Quote:One of my favorite combinations for globulars is my friend's 20mm Nagler and his 2x Powermate. David, Why just not use an 11mm Nagler or is it just the flexibility to double any EP?
Quote:I have 1.25" and 2" barlows/powermates. I don't have a problem with barlowing my 2" 28mm ES68. In fact, if I wanted to spend the money, I could probably be perfectly happy with the 28mm ES68 and a couple of 2" Siebert barlows.
10" F/4.7 Modified Skywatcher Reflector 38mm Orion Q70, 17mm Modded Ultima LX 10mm TeleVue Delos, 7mm Pentax XL
Quote:Quote:I have 1.25" and 2" barlows/powermates. I don't have a problem with barlowing my 2" 28mm ES68. In fact, if I wanted to spend the money, I could probably be perfectly happy with the 28mm ES68 and a couple of 2" Siebert barlows.DaveDave, does the ES 28mm vignette in a barlow? I know my 28mm and 20mm Series 5000 did, but the 20mm ES 68 didn't. I'm now wondering if the Meade series 5000 68's and ES 68's are a bit different in lens design? Hmmmmm.Cheers,
Quote:I have 1.25" and 2" barlows/powermates. I don't have a problem with barlowing my 2" 28mm ES68. In fact, if I wanted to spend the money, I could probably be perfectly happy with the 28mm ES68 and a couple of 2" Siebert barlows.Dave
Quote:Dave, the 28mm ES 68 is a 2" eyepiece, I'm trying to figure out how you are using it with a 1.25" to 2" adapter?
Quote:Actually, the Meade 2" 28mm SWA vignettes quite a lot in a 2" barlow. In that adapter, the 2" 28mm ES or ANY 2" 28mm EP will vignette like crazy in that adapter Dave.Cheers,
Orion XT8i Dob 9x50 RACI Finder TELRAD Reflex Sight Agena SWA 38mm 70 FOV 2" EP Orion 25+10mm Sirius Plossl 52 FOV EP ES 82* 11mm, 18mm 2" ES 68* 24mm 6mm, 25mm Ortho. EP Televue 3X Barlow Filters Baader Continuum, UV/IF cut, Lumicon UHC, DGM OIII. SkySafari T-Ring and Adaptor for Olympus E-510 Oly sz-14 SteadyPix Deluxe iOptron SkyTracker 7.7lb Electro Dot Sight RD400X http://www.astrobin.com/users/NeilMac/
Bill 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.
Celestron C8 XLT on CG5 8inch EQ mounted newt Parks 8inch f/6 90mm mak
Quote:Had the 2.5x and 4x powermates which are now gone, retained the Celestron 2x Ultima and Antares 1.6 , ...
Quote:Curious what size Powermates or barlows people use (1.25" or 2" or both); and if you use a 2", why?
Orion XT12i with Swayze-refigured primary/Protostar secondary
Televue NP101 refractor
William Optics Megrez 90 refractor
Universal Astronomics Deluxe Mounts