Meade LS8 ACF Meade 2" Diagonal Apetura 10" Tweakers Package Meade ETX-125, ETX-90 for Solar Celestron 80mm APO PST Meade SWA - 34mm,28mm,24mm,20mm Brandon 32mm, 16mm Vernonscope 40mm Erfle 2" ES 14mm,11mm,6.7mm 8.8 Nagler 13mm T6, Pan 19mm Meade 12.4 Pl,9.7mm, 15mm SP Meade 2x Shorty Barlow Powermate 2.5x WO Bino Viewer, 20mm 66* pair Denkmier 2 Super System Meade Nebula Filters Meade 9x60 Bino Vivitar S1 8x42 Bino Canon T2i, 18-55mm, 50mm 1.8, 55-250mm
We have enough Historians, we need more Pioneers!
Stellarvue SV70ED, UA DwarfStar, Oberwerk / AstroTech AT80EDT, AT Voyager / Celestron C6XLT, AT Voyager / Meade 8" LightBridge / Vixen VMC 110L (Baader Solar Film), Porta II / Celestron Nexstar 102GT, ES Twilight I / Oberwerk 20x80 DIII, Orion 10x50 Resolux
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
Blog: Astronomy & Living by Hernando
Quote:Nice book, I hope to pick it up someday.Interesting choice of eyepieces on the front cover... Astro-Physics SPL, Pentax XO 5mm, GSO 2.5x barlow and Smart Astronomy Plossl 6mm. No TeleVue eyepieces? Not even one Pentax XW there? I guess he had to do that to remain impartial. We all know he loves them (XWs) too.
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.
Quote:>>A few minutes ago, EVERY page in the book was available to preview on Amazon.ca, but now most of the pages have been restricted.Here's how it works on Amazon. When you first open up the preview, all pages are available to you. You can hence pretty much jump to any section of the book to explore. But after you've been there for a few minutes, Amazon starts locking up pages (for you only). Spend a few more additional minutes and over 75% of any book will become restricted. After all, they don't want to allow everyone to read all pages online and not purchase the book. Regards,Manishwww.AgenaAstro.com
Quote:Wow, looks fantastic, Bill!
A few minutes ago, EVERY page in the book was available to preview on Amazon.ca, but now most of the pages have been restricted. (I may have noticed an error on Page 18 -- the WO UWAN AFOV listed as 20 degrees -- but I can't see that page anymore so I can't be sure. Might want to double check that, Bill.)
★ Few Plossls ● Meade 4000 8.8mm UWA ● ES 11mm 82* ● TV Nagler 20mm Type 2 ● WO 40mm SWAN ● Burgess Binoviewer★
★ Meade ETX 90RA ● CPC 800 ● Amscope T490B★
★ Celestron Skymaster 25x100 ● Kowa 7x35 Featherweight, 10* fov ● Tasco 15x50 Model 506 10* fov ● Technar 7x50 7.1* fov ● Nippon Kogaku Mikron 6x18 ★
Move over people, I need my space!
Johnny FS152 15" Obsession Classic w/ 14.5" f/4.65 Zambuto
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 hate to be the skeptic, but any astronomy book that deals with currently produced products will be outdated in short order,... Vahe
Show me an aging Greek and I'll show you the Nick of time.
Quote:Quote:I hate to be the skeptic, but any astronomy book that deals with currently produced products will be outdated in short order,...
True, but this book is really not a clone of "Star Ware."
Bill comprehensively covers all subjects related (and maybe some unrelated) to eyepieces. Many things about eyepieces will never change: the laws of optics for example.
Quote:I hate to be the skeptic, but any astronomy book that deals with currently produced products will be outdated in short order,...
Quote:I hate to be the skeptic, but any astronomy book that deals with currently produced products will be outdated in short order, Phil Harrington Star Ware is just one example of such effort, books simply can not compete with Internet, unless the author is planning on continuous updates to keep up with the newer offerings. Vahe
Orion XT12i with Swayze-refigured primary & Protostar secondary
Televue NP101 refractor
William Optics Megrez 90 refractor
Universal Astronomics Deluxe Mounts
Quote:I think the premise of Bill's book is as an eyepiece "primer" not a buyer's guide that will go out of date, illustrating that this oft-overlooked part of the optical chain really has as much merit as the optics in the scope themselves...a philosophy to which I subscribe. I think by "Choosing" the title implies the type more than the brand and "Using" certainly draws emphasis toward how those types perform at various purposes.
Quote:The current state of telescopic eyepieces is especially suitable for being presented in a durably useful way. This is in part because the current state of the art is hitting up against some fundamental limits, for example in how far AFOV can be extended without creating unmanageable bulk or edge aberrations (to say nothing of enormous ramp-up in expense). Improvements in coating technology from this point on will be more incremental than fundamental.
Quote:Creating complex widefield eyepeices with light transmission, sharpness, and minimization of aberrations approaching extremely close to that of "simpler" limited AFOV glass is an established achievement at this point (Not close enough for Brandon or ortho purists, but more than close enough, negligibly close for the tastes of a great many others). There really hasn't been any truly revolutionary eyepiece developments since TeleVue's Ethos, followed up by the almost-as-good but much-less-expensive (and plenty good enough for many people's tastes) Explore Scientific eyepieces.
Quote:In short, unless there is a massive unforeseen switch-over to electronic eyepieces/video astronomy in the next five to ten years ...
Jeff Morgan - Wile E. Coyote School of Telescope Making
Quote:Quote:I would have to agree with you that for the DSO enthusiast whose forays into planetary or double star observing are occasional and brief, the Delos indeed gives you 90% of what premium simple glass does - close enough as you say. I consider myself one of those "purists" and could make due with Delos in a pinch.Matters of degree are of course subjective, but I would go further and say that Delos is probably a big a step forward from Ethos as Ethos was over Nagler, So for planetary, delos>ethos>Nagler ? With delos being 90% as good as premium minimal glass ep. Does that mean ZAO, Pentax XO, etc only or do you think a TV plossl is better than delos for planetary contrast/details ?
Quote:I would have to agree with you that for the DSO enthusiast whose forays into planetary or double star observing are occasional and brief, the Delos indeed gives you 90% of what premium simple glass does - close enough as you say. I consider myself one of those "purists" and could make due with Delos in a pinch.Matters of degree are of course subjective, but I would go further and say that Delos is probably a big a step forward from Ethos as Ethos was over Nagler,
Quote:With the advantages of magnitude reach, color, direct vision, and insensitivity to light pollution, how much does resolution and integration times of electronic sensors have to improve to kick-off that revolution?
Quote:Just got an email from Amazon, mine's been shipped!
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:So for planetary, delos>ethos>Nagler ? With delos being 90% as good as premium minimal glass ep. Does that mean ZAO, Pentax XO, etc only or do you think a TV plossl is better than delos for planetary contrast/details ?
Quote:A little innovation in pricing might be helpful. With the Collins I3 at $3K and the Mallincam at $1.5K (without the display) it would seem that this market will stay small for now. This stuff is expensive at both ends (supply and demand).
Scopes: LS-8ACF/C8XLT/C6XLT/ E.S Comet Hunter - Mounts: Nexstar/TwilightII/CT Duo-T Cam.: Mallincam Xtreme/SDC-435 Eyepieces: TV Plos:15-32-40-55/Pan:16-27-35-41/T6:5-7-9-11-13/T5:17-20-26-31/Ethos:6-13-17-21/ Brandon 8-12-16-24-32-48-40mm Erfle/ E.S 100º-82º-68º: set / Pentax XL:14-21/XW:3.5-5-7-10-30/XF:8.5,12 Meade 4K UWA, 4K & 5K SWA: Set Baader Hyperion & Aspheric: Set / U.O Orthos ULTRASCOPICS, TMB PLANETARY II: Set /Paragon 30,40
Quote:Quote:Just got an email from Amazon, mine's been shipped! Mine too!
XT10i, 8" LX90, 102mm f/9.8 achro, 100mm f/6 achro, 80mm f/7.5 ED, 60mm f/5.8 achro, 60mm f/11.7 achro, 10x50s, 15x70s
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