Evolution of Eyepieces by Chris Lord
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Evolution of Eyepieces by Chris Lord
I just brought this over from the old place. I suggest we make this sticky?
http://www.brayebrookobservatory.org/Br ... PIECES.pdf
http://www.brayebrookobservatory.org/Br ... PIECES.pdf
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: Evolution of Eyepieces by Chris Lord
My vote is yes for a stickie, but let me ping the other CoAs to get some additional buy-in. A quick question, is this public domain information? BTW, this is an awesome informational reference.
Cheers,
JT
Cheers,
JT
∞ Primary Scopes: #1: Celestron CPC1100 #2: 8" f/7.5 Dob #3: CR150HD f/8 6" frac
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
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Searching the skies since 1966. "I never met a scope I didn't want to keep."
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
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Re: Evolution of Eyepieces by Chris Lord
Yes, it is public domain. The link is direct to Chris Lord's website and is open access!
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: Evolution of Eyepieces by Chris Lord
Thanks for bringing it over nFA. This reference is must have/read for anyone who is into EPs.
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.
Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2437, Comets: 34, Asteroids: 257
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.
Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2437, Comets: 34, Asteroids: 257
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Re: Evolution of Eyepieces by Chris Lord
You had me wondering what was going on Bigzmey, I was sure I had pinned this a long time ago
Gabrielle
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1011110)
The only culture I have is from yogurt
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1011110)
The only culture I have is from yogurt
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Re: Evolution of Eyepieces by Chris Lord
Somehow missed the post earlier. Also, figure out it is good to bump it for more exposure.Lady Fraktor wrote: ↑Mon Feb 03, 2020 9:52 pm You had me wondering what was going on Bigzmey, I was sure I had pinned this a long time ago
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.
Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2437, Comets: 34, Asteroids: 257
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.
Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2437, Comets: 34, Asteroids: 257
- Ruud
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Re: Evolution of Eyepieces by Chris Lord
Here's Lord's eyepiece evolution tree:
It was a jpeg originally, but it is so big that it works better as a pdf. Zoom in and navigate around the tree.7x50 Helios Apollo ✶ 8x42 Bresser Everest ✶ 73mm f/5.9 WO APO ✶ 4" f/5 TeleVue Genesis ✶ 6" f/10 Celestron 6SE ✶ 0.63x reducer ✶ 1.8, 2, 2.5 and 3x Barlows ✶ eyepieces from 4.5 to 34mm
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Re: Evolution of Eyepieces by Chris Lord
Very interesting resource notFritz. Thank you.
-Michael
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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Re: Evolution of Eyepieces by Chris Lord
Interesting article but way too technical for me, a few thing stood out :
on page 44
" It is also quite inappropriate for example.
equipping anf/ 10 Schmidt-Cassegrain
with anf/ 6.3 focal reducer, or an f/ 4
Dobsonian light bucket with acoma corrector, and then using an 8 element
ultra-wide angle eyepiece. Unless that
is, it is your purpose to loose as much
light as possible and drive image quality
already perilously close to the diffraction
limit, well below it."
I have done these things and with the focal reducer on a F10SCT using a Panoptic 27mm I would agree the result was not wonderful but I also manage to borrow a 21mm Ethos that I coupled it with my F4.5 Obsession and Paracorr II......I cannot comment on distortion but the sharpness, edge to edge, in the views were excellent!
The other thing what court my attention is the "Pretoria" eyepiece. Someone asked, on another forum, if there are "telescope correcting" eyepieces available and my response was that I don't think so because the market for it would be too small, I was wrong but right about the market because they are not available anymore. Then the name?! Pretoria is the administrative capital of South Africa, why name a eyepiece after it?
on page 44
" It is also quite inappropriate for example.
equipping an
with an
Dobsonian light bucket with a
ultra-wide angle eyepiece. Unless that
is, it is your purpose to loose as much
light as possible and drive image quality
already perilously close to the diffraction
limit, well below it."
I have done these things and with the focal reducer on a F10
The other thing what court my attention is the "Pretoria" eyepiece. Someone asked, on another forum, if there are "telescope correcting" eyepieces available and my response was that I don't think so because the market for it would be too small, I was wrong but right about the market because they are not available anymore. Then the name?! Pretoria is the administrative capital of South Africa, why name a eyepiece after it?
Last edited by Piet Le Roux on Fri May 22, 2020 9:13 am, edited 2 times in total.
Main Equipment : Tele Vue 27mm Panoptic, 7&13mm Nagler, Big Barlow : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal : Camera Fuji XT100
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Re: Evolution of Eyepieces by Chris Lord
The name is from the design inventors.
https://myscienceshop.com/product/digi ... /tmkpdf029
Pretoria has been a site for observatories so that’s likely the reason I’d guess. If I recall correctly Harvard University had a southern observatory station at Pretoria as did John Herschel?
https://myscienceshop.com/product/digi ... /tmkpdf029
Pretoria has been a site for observatories so that’s likely the reason I’d guess. If I recall correctly Harvard University had a southern observatory station at Pretoria as did John Herschel?
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: Evolution of Eyepieces by Chris Lord
Here is the article: https://astromart.com/reviews/telescope ... stigmatism
Main Equipment : Tele Vue 27mm Panoptic, 7&13mm Nagler, Big Barlow : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal : Camera Fuji XT100
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Re: Evolution of Eyepieces by Chris Lord
The Harvard University southern Station were originally in Peru but were moved to Bloemfontein in 1927. It is called Boyden and is 25 Km outside Bloemfontein. I have access to the observatory and have done some of my best viewing with the 15" Obsession from there.notFritzArgelander wrote: ↑Fri May 22, 2020 9:01 am The name is from the design inventors.
https://myscienceshop.com/product/digi ... /tmkpdf029
Pretoria has been a site for observatories so that’s likely the reason I’d guess. If I recall correctly Harvard University had a southern observatory station at Pretoria as did John Herschel?
here is a photo of some famous people taken at Boyden in 1952 : In the centre we have Jan Hendrik Oort and Georges Lemaître
Main Equipment : Tele Vue 27mm Panoptic, 7&13mm Nagler, Big Barlow : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal : Camera Fuji XT100
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Re: Evolution of Eyepieces by Chris Lord
Main Equipment : Tele Vue 27mm Panoptic, 7&13mm Nagler, Big Barlow : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal : Camera Fuji XT100
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Re: Evolution of Eyepieces by Chris Lord
This is an excellent work by Chris! Quite comprehensive and a lot of research on his part. Is Chris a member here?
-Bill
U.S.A.F. Veteran - Visual Amateur Astronomer since 1966 - Fully Retired since 2019
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PM and Email communications always welcomed
U.S.A.F. Veteran - Visual Amateur Astronomer since 1966 - Fully Retired since 2019
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Re: Evolution of Eyepieces by Chris Lord
I'm not aware if he is.....WilliamPaolini wrote: ↑Thu May 27, 2021 12:33 am This is an excellent work by Chris! Quite comprehensive and a lot of research on his part. Is Chris a member here?
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: Evolution of Eyepieces by Chris Lord
Unfortunately he is not. The treatise is available from his Brayebrook Observatory site.WilliamPaolini wrote: ↑Thu May 27, 2021 12:33 am This is an excellent work by Chris! Quite comprehensive and a lot of research on his part. Is Chris a member here?
Gabrielle
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1011110)
The only culture I have is from yogurt
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1011110)
The only culture I have is from yogurt
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Re: Evolution of Eyepieces by Chris Lord
As an Erfle-gatherer, and see how some are better than others, I reckon there is common labelling, such as with Plossls/ symmetricals.
Some "Erfle" eyepieces could be Zeiss Astroplantakular, Kaspereit, original Panoptic, Konig, Bertele or whatever. All "Erfle", easier to put on a barrel or label & more widely known than the true longwinded name.
Ex-military is a separate fan base for optics, as other things.
Some "Erfle" eyepieces could be Zeiss Astroplantakular, Kaspereit, original Panoptic, Konig, Bertele or whatever. All "Erfle", easier to put on a barrel or label & more widely known than the true longwinded name.
Ex-military is a separate fan base for optics, as other things.
Unashamed Linda Ronstadt ♡ fan! :Clap:
Eyepieces from: Aero, Antares, APM, Baader, Brandon, Bresser, Celestron, Datysun, Docter, Explore Scientific, GSO, I R Poyser, Meade, Nikon, Orion, Pentax, Rodenstock, Siberia, Sky-Watcher, Taiso, Takahashi, TAL, Tele Vue, TS, Vernonscope, Vixen, Zeiss.
Scopes from: Altair, Bresser, Lumicon, Orion Optics UK, Sky-Watcher, Takahashi, Tele Vue, TS, Vixen.
Eyepieces from: Aero, Antares, APM, Baader, Brandon, Bresser, Celestron, Datysun, Docter, Explore Scientific, GSO, I R Poyser, Meade, Nikon, Orion, Pentax, Rodenstock, Siberia, Sky-Watcher, Taiso, Takahashi, TAL, Tele Vue, TS, Vernonscope, Vixen, Zeiss.
Scopes from: Altair, Bresser, Lumicon, Orion Optics UK, Sky-Watcher, Takahashi, Tele Vue, TS, Vixen.
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Re: Evolution of Eyepieces by Chris Lord
Erfle is a pretty adaptable type of the eyepiece designs.
The Ur-design has the symmetrical convex/convex middle lens, two lens materials out of five are the same.
The Astro-Planokular has an asymmetrical convex/convex middle lens, and just three different glass materials in its five lenses. Optimized for the observatory grade refractors.
The Zeiss binocular eyepiece, a derivate of Erfle, has two positive focus lenses between the doublets, both of them with different glass materials.
The modern wide field designs (tactical optics) employ a higher level of complication in the material choice and in the variety of the lens surface curvatures,
https://spie.org/publications/pm92_1124 ... iece?SSO=1
https://spie.org/publications/tt82_83_eyepiece?SSO=1
Other examples are the bull's eyes from Leica, Rodenstock (also in my collection), Zeiss, and the Swiss WILD Heerbrugg (also in my collection),
http://web.archive.org/web/200701271148 ... de/F30.htm
The design of the Swarovski 20x S W (f=23mm) spotting eyepiece (in my arsenal) goes back to the Zeiss binocular eyepiece, a derivate of Erfle.
Best,
JG
PS : The SPIE.org page is on maintanence 14 - 15 August, 2021
The Ur-design has the symmetrical convex/convex middle lens, two lens materials out of five are the same.
The Astro-Planokular has an asymmetrical convex/convex middle lens, and just three different glass materials in its five lenses. Optimized for the observatory grade refractors.
The Zeiss binocular eyepiece, a derivate of Erfle, has two positive focus lenses between the doublets, both of them with different glass materials.
The modern wide field designs (tactical optics) employ a higher level of complication in the material choice and in the variety of the lens surface curvatures,
https://spie.org/publications/pm92_1124 ... iece?SSO=1
https://spie.org/publications/tt82_83_eyepiece?SSO=1
Other examples are the bull's eyes from Leica, Rodenstock (also in my collection), Zeiss, and the Swiss WILD Heerbrugg (also in my collection),
http://web.archive.org/web/200701271148 ... de/F30.htm
The design of the Swarovski 20x S W (f=23mm) spotting eyepiece (in my arsenal) goes back to the Zeiss binocular eyepiece, a derivate of Erfle.
Best,
JG
6" F/5 Sky-Watcher achro, 2" BBHS Star Diagonal, 2" zenith prism, 1.25" Takahashi prism
Leica 82mm APO Televid
Eyepieces: Docter UWA; Leica B WW and WW Asph. Zoom; Leica HC Plan S and L, monocentric; Pentax SMC XW, O-, XO; Tak MC O, Carl Zeiss B WW, and Pl, E-Pl, S-Pl, W-Pl;
Swarovski SW; Baader Symmetric Diascope Edition; Nikon NAV SW, ; TMB supermonocentric; Rodenstock; Vixen HR; TV Delos
Filters: Astrodon, Astronomik, Baader, Balzers, Zeiss West and East, Lumicon
Binoculars (7x42 up to 15x85): Docter Nobilem, Leica Ultravid, Nikon Astroluxe, Swarovski EL Swarovision; BA8 (Kunming Optical)
Leica 82mm APO Televid
Eyepieces: Docter UWA; Leica B WW and WW Asph. Zoom; Leica HC Plan S and L, monocentric; Pentax SMC XW, O-, XO; Tak MC O, Carl Zeiss B WW, and Pl, E-Pl, S-Pl, W-Pl;
Swarovski SW; Baader Symmetric Diascope Edition; Nikon NAV SW, ; TMB supermonocentric; Rodenstock; Vixen HR; TV Delos
Filters: Astrodon, Astronomik, Baader, Balzers, Zeiss West and East, Lumicon
Binoculars (7x42 up to 15x85): Docter Nobilem, Leica Ultravid, Nikon Astroluxe, Swarovski EL Swarovision; BA8 (Kunming Optical)
- Don Pensack
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Re: Evolution of Eyepieces by Chris Lord
You might like this information, too:
https://www.telescope-optics.net/eyepiece_raytrace.htm
https://www.telescope-optics.net/eyepiece_raytrace.htm
Astronomer since 1963
Currently using a 12.5" dob and a 4" apo refractor
Currently using a 12.5" dob and a 4" apo refractor
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Re: Evolution of Eyepieces by Chris Lord
The Erfles, and some other eyepieces are desribed by the Zeiss designers inDon Pensack wrote: ↑Sat Aug 14, 2021 4:26 pm You might like this information, too:
https://www.telescope-optics.net/eyepiece_raytrace.htm
DIE FERNROHRE UND ENTFERNUNGMESSER
Dr. Phil., Dr.-Ing. E. H. Albert König, and Dr. Rer. Nat. Horst Köhler
3rd enlarged edition, Springer-Verlag Berlin and Heidelberg, 1959
reprint on my bookshelf,
JG
6" F/5 Sky-Watcher achro, 2" BBHS Star Diagonal, 2" zenith prism, 1.25" Takahashi prism
Leica 82mm APO Televid
Eyepieces: Docter UWA; Leica B WW and WW Asph. Zoom; Leica HC Plan S and L, monocentric; Pentax SMC XW, O-, XO; Tak MC O, Carl Zeiss B WW, and Pl, E-Pl, S-Pl, W-Pl;
Swarovski SW; Baader Symmetric Diascope Edition; Nikon NAV SW, ; TMB supermonocentric; Rodenstock; Vixen HR; TV Delos
Filters: Astrodon, Astronomik, Baader, Balzers, Zeiss West and East, Lumicon
Binoculars (7x42 up to 15x85): Docter Nobilem, Leica Ultravid, Nikon Astroluxe, Swarovski EL Swarovision; BA8 (Kunming Optical)
Leica 82mm APO Televid
Eyepieces: Docter UWA; Leica B WW and WW Asph. Zoom; Leica HC Plan S and L, monocentric; Pentax SMC XW, O-, XO; Tak MC O, Carl Zeiss B WW, and Pl, E-Pl, S-Pl, W-Pl;
Swarovski SW; Baader Symmetric Diascope Edition; Nikon NAV SW, ; TMB supermonocentric; Rodenstock; Vixen HR; TV Delos
Filters: Astrodon, Astronomik, Baader, Balzers, Zeiss West and East, Lumicon
Binoculars (7x42 up to 15x85): Docter Nobilem, Leica Ultravid, Nikon Astroluxe, Swarovski EL Swarovision; BA8 (Kunming Optical)
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