Home 500mm Giant Lenses Database - between D=500-200mm 200mm 127mm 100mm 80mm 60mm 30mm Search Page

Mission:
This database was created to help people to find information about special large format (big diameter) objective lenses, achromatic and apochromatic (APO) doublets, triplets, and quadruplets, which are not just condensors, having relatively fast focal ratios. These giant lenses can be effectively used in extremely fast telescopes (with relatively small magnifications) in huge binoculars, and TV/HDTV movie projectors. The original function of these very big optics usually used to be projection lenses utilized mainly in episcopes (epidiascope, or episkop).
The images and the data are mainly gathered from ebay (www.ebay.de, photo.ebay.de, photography.ebay.com, www.ebay.ca, www.ebay.co.uk, www.ebay.it.) Unfortunately, on eBay the images and the data are kept only for a limited time. That's the main reason why my site was set up. I don't know how long the links that are given below will be alive, but anyway, you can use them as a starting point. On this site I provide separate links to every given lens, so you can show exactly to anybody what kind of lens are you looking for, or plan to use for your project.
My lens image and data collection has more than a thousand photographs in more than 150 Mbytes - and is growing day after day.


Link to this lens: Yerkes_D1016mm_F18_f18000mm_01
Yerkes D1016mm F18 f18000mm 01 Yerkes D1016mm F18 f18000mm 02 Yerkes D1016mm F18 f18000mm 03 Yerkes D1016mm F18 f18000mm 04 Yerkes D1016mm F18 f18000mm 05 Yerkes D1016mm F18 f18000mm 08 Yerkes D1016mm F18 f18000mm 07 Yerkes D1016mm F18 f18000mm 08

D=1016 mm !!!


Manufactured by: Alvan Clark for George Ellery Hale and Charles Tyson Yerkes (made in U.S.A.)
Type: for largest Lens Telescope of the World
Diameter: 40 in = 1016 mm
F/D ratio: F18
Focal length: 18000 mm
Length:
Mass: ?
Serial N:
Found: at http://astro.uchicago.edu/yerkes/
Owner: http://astro.uchicago.edu/yerkes/


Link to this lens: Lick_D914mm_F19_f17400mm_01
Lick D914mm F19 f17400mm 01 Lick D914mm F19 f17400mm 02 Lick D914mm F19 f17400mm 03 Lick D914mm F19 f17400mm 04 Lick D914mm F19 f17400mm 05 Lick D914mm F19 f17400mm 06 Lick D914mm F19 f17400mm 07

D=914 mm !!


Manufactured by: Alvan Clark for James Lick (made in U.S.A.)
Type: 2nd largest Lens Telescope of the World
Diameter: 36 in = 914 mm
F/D ratio: F19
Focal length: 17400 mm
Length:
Mass: ?
Serial N:
Found: at http://www.ucolick.org/public/telescopes/36-inch.html
Owner: http://www.ucolick.org/public/telescopes/36-inch.html


Link to this lens: Thaw_Refractor_D762mm_F18.8_f14326mm_01
Thaw Refractor D762mm F18.8 f14326mm 01 Thaw Refractor D762mm F18.8 f14326mm 02 Thaw Refractor D762mm F18.8 f14326mm 03

D=762 mm !


Manufactured by: John Alfred Brashear (Pittsburgh, Pennsylvania, made in U.S.A.)
Type: Flint-Forward Achromatic Air-Spaced Doublet for photographic use in the Thaw Refractor (The original blue-optimized lens was replaced with a red-optimized one in 1985.)
Diameter: 762 mm (=30 in)
F/D ratio: F18.8
Focal length: 14326 mm
Length:
Mass:
Serial N:
Found: at www.pitt.edu
Owner: University of Pittsburgh at www.pitt.edu


Link to this lens: Pulkovo_Refractor_D762mm_F18.8_f14326mm_01
Pulkovo Refractor D762mm F18.8 f14326mm 01 Pulkovo Refractor D762mm F18.8 f14326mm 02 Pulkovo Refractor D762mm F18.8 f14326mm 03

D=762 mm !


Manufactured by: Alvan Clark & Sons (Massachusetts, USA)
Type: Achromatic Air-Spaced Doublet for Pulkovo Observotary
Diameter: 762 mm (=30 in)
F/D ratio: F18.8
Focal length: 14326 mm
Length:
Mass:
Serial N:
Found: at wikipedia
Owner: Russia wikipedia


Link to this lens: Lamont-Hussey_Refractor_D684mm_F19_f13000mm_01
Lamont-Hussey Refractor D684mm F19 f13000mm 01

D=684 mm !


Manufactured by: ? (made in ?)
Type: Achromatic Doublet for large Telescope at The Lamont-Hussey Observatory Naval Hill, Bloemfontein, South Africa)
Diameter: 684 mm
F/D ratio: F19
Focal length: 13000 mm
Length:
Mass:
Serial N:
Found: at www.assabfn.co.za
Owner: The Lamont-Hussey Observatory at www.assabfn.co.za


Link to this lens: Carl_Zeiss_APO_D650mm_F16.2_f10550mm_01
Carl Zeiss APO D650mm F16.2 f10550mm 01 Carl Zeiss APO D650mm F16.2 f10550mm 02 Carl Zeiss APO D650mm F16.2 f10550mm 03 Carl Zeiss APO D650mm F16.2 f10550mm 04

D=650 mm !


Manufactured by: Carl Zeiss (made in Germany)
Type: APO (for large Telescope at Belgrade Astronomical Observatory)
Diameter: 650 mm
F/D ratio: F16.2
Focal length: 10550 mm
Length:
Mass:
Serial N:
Found: at www.aob.bg.ac.yu
Owner: Belgrade Astronomical Observatory at www.aob.bg.ac.yu


Link to this lens: Carl_Zeiss_APO_Sonnar_T_D425mm_F4.0_f1700mm_01
Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 01 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 02 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 03 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 04 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 05 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 06 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 07 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 08 Carl Zeiss APO Sonnar T D425mm F4.0 f1700mm 09

D=425 mm !


Manufactured by: Carl Zeiss (made in Germany)
Type: APO Sonnar T 4/1700, 15 optical elements in 13 groups (for Super Telephoto)
Diameter: 425 mm
F/D ratio: F4.0
Focal length: 1700 mm
Length:
Mass: 256 kg
Serial N:
Found: at Rob Galbraith
Owner: Zeiss www.zeiss.ru


Link to this lens: Pulkovo_Refractor_D381mm_F15_f5715mm_01
Pulkovo Refractor D381mm F15 f5715mm 01 Pulkovo Refractor D381mm F15 f5715mm 02 Pulkovo Refractor D381mm F15 f5715mm 03 Pulkovo Refractor D381mm F15 f5715mm 04 Pulkovo Refractor D381mm F15 f5715mm 05 Pulkovo Refractor D381mm F15 f5715mm 06

D=381 mm !


Manufactured by: John Alfred Brashear (Pittsburgh, Pennsylvania, made in U.S.A.)
Type: Flint-Forward Achromatic Air-Spaced Doublet for the Pulkovo Telescope
Diameter: 381 mm
F/D ratio: F15 ?
Focal length: 5715 mm
Length:
Mass:
Serial N:
Found: at www.aaa.org
Owner: Pulkovo Observatorym at www.aaa.org


Link to this lens: Brashear_CSTM_D381mm_F15_f5715mm_01
Brashear CSTM D381mm F15 f5715mm 01 Brashear CSTM D381mm F15 f5715mm 02 Brashear CSTM D381mm F15 f5715mm 03

D=381 mm !


Manufactured by: John Alfred Brashear (Pittsburgh, Pennsylvania, made in U.S.A.)
Type: Flint-Forward Achromatic Air-Spaced Doublet for the Dominion Observatory, Canada
Diameter: 381 mm
F/D ratio: F15
Focal length: 5715 mm
Length:
Mass:
Serial N: 1975.1087
Found: at www.sciencetech.technomuses.ca
Owner: Dominion Observatory at www.sciencetech.technomuses.ca


Link to this lens: LZOS_APO_TMB_D356mm_F12_f4272mm_01
LZOS APO TMB D356mm F12 f7272mm 01 LZOS APO TMB D356mm F12 f7272mm 02 LZOS APO TMB D356mm F12 f7272mm 03 LZOS APO TMB D356mm F12 f7272mm 04 LZOS APO TMB D356mm F12 f7272mm 05 LZOS APO TMB D356mm F12 f7272mm 06 LZOS APO TMB D356mm F12 f7272mm 07 LZOS APO TMB D356mm F12 f7272mm 08 LZOS APO TMB D356mm F12 f7272mm 09 LZOS APO TMB D356mm F12 f7272mm 0a LZOS APO TMB D356mm F12 f7272mm 0b LZOS APO TMB D356mm F12 f7272mm 0c LZOS APO TMB D356mm F12 f7272mm 0d

D=356 mm !


Manufactured by: LZOS (made in Russia)
Type: P356/12 Triplet Apochromatic for TMB Telescopes with OK-4 glass (fluorophosphate crown)
Diameter: 356 mm
F/D ratio: F12
Focal length: 14" = 4272 mm
Length:
Mass:
Serial N:
Found: at www.tmboptical.com
Owner: tmboptical tmboptical@aol.com


Link to this lens: Opik_Telescope_APO_D330mm_F10_f3300mm_01
Opik Telescope APO D330mm F10 f3300mm 01 Opik Telescope APO D330mm F10 f3300mm 02 Opik Telescope APO D330mm F10 f3300mm 03 Opik Telescope APO D330mm F10 f3300mm 04 Opik Telescope APO D330mm F10 f3300mm 05 Opik Telescope APO D330mm F10 f3300mm 06 Opik Telescope APO D330mm F10 f3300mm 07 Opik Telescope APO D330mm F10 f3300mm 08 Opik Telescope APO D330mm F10 f3300mm 09 Opik Telescope APO D330mm F10 f3300mm 10

D=330 mm !


Manufactured by: Opik (made in ?)
Type: Apochromatic Oil-Spaced Triplet for a large Astronomical Telescope
Diameter: 330 mm
F/D ratio: F10 ?
Focal length: 3300 mm ?
Length:
Mass: 27 kg
Serial N:
Found: at www.spaceguarduk.com
Owner: Spaceguard Centre at www.spaceguarduk.com


Link to this lens: DKD_D310F3000_D310mm_F9.7_f3000mm_01
DKD D310F3000 D310mm F9.7 f3000mm 01 DKD D310F3000 D310mm F9.7 f3000mm 02

D=310 mm !


Manufactured by: DKD optics co., ltd. (made in China)
Type: FH Achromat Doublet for Telescope (multilayer wideband coating)
Diameter: 310 mm
F/D ratio: F9.7
Focal length: 3000 mm
Length:
Mass:
Serial N:
Found: at eBay
Owner: diy_dkd at eBay


Link to this lens: Hastings-Brashear_D310mm_F18_f5550mm_01
Hastings-Brashear D310mm F18 f5550mm 01 Hastings-Brashear D310mm F18 f5550mm 02 Hastings-Brashear D310mm F18 f5550mm 03

D=310 mm !


Designed by: Charles S. Hastings
Manufactured by: John Alfred Brashear (Pittsburgh, Pennsylvania, made in U.S.A.)
Type: Flint-Forward Achromatic Air-Spaced Doublet for the Kenwood Observatory Telescope
Diameter: 310 mm
F/D ratio: F17.9
Focal length: 5550 mm
Length:
Mass:
Serial N:
Found: at photos.stellafane.org
Owner: John Briggs photos.stellafane.org


Link to this lens: Carl_Zeiss_refractor_D307mm_F16.7_f5030mm_01
Carl Zeiss refractor D307mm F16.7 f5030mm 01 Carl Zeiss refractor D307mm F16.7 f5030mm 02 Carl Zeiss refractor D307mm F16.7 f5030mm 03 Carl Zeiss refractor D307mm F16.7 f5030mm 04 Carl Zeiss refractor D307mm F16.7 f5030mm 05 Carl Zeiss refractor D307mm F16.7 f5030mm 06

D=307 mm !


Manufactured by: Carl Zeiss Jena (made in Germany)
Type: Achromatic Doublet for the Griffith Observatory (attached to a smaller, 9.5" telescope)
Diameter: 307 mm
F/D ratio: F16.7
Focal length: 5030 mm
Length:
Mass: 4500 kg
Serial N:
Found: at www.lacity.org
Owner: Griffith Observatory www.lacity.org


Link to this lens: Brashear_D305mm_F15_f4580mm_01
Brashear D305mm F15 f4580mm 01 Brashear D305mm F15 f4580mm 02 Brashear D305mm F15 f4580mm 03 Brashear D305mm F15 f4580mm 04 Brashear D305mm F15 f4580mm 05 Brashear D305mm F15 f4580mm 06 Brashear D305mm F15 f4580mm 07 Brashear D305mm F15 f4580mm 08 Brashear D305mm F15 f4580mm 09 Brashear D305mm F15 f4580mm 10 Brashear D305mm F15 f4580mm 11 Brashear D305mm F15 f4580mm 12 Brashear D305mm F15 f4580mm 13

D=305 mm !


Manufactured by: John Alfred Brashear (Pittsburgh, Pennsylvania, made in U.S.A.)
Type: Flint-Forward Achromatic Air-Spaced Doublet for a large Astronomical Telescope
Diameter: 305 mm
F/D ratio: F15
Focal length: 4580 mm
Length:
Mass:
Serial N:
Found: at www.astro.uiuc.edu
Owner: Astronomical Society at the University of Illinois


Link to this lens: R_E_Brandt_D305mm_F16.6_f5060mm_01
R.E. Brandt D305mm F16.6 f5060mm 01 R.E. Brandt D305mm F16.6 f5060mm 02

D=305 mm !


Manufactured by: R. E. Brandt with Paslow Optical Co. (made in U.S.A.)
Type: Large Achromat for an Astronomical Telescope, Computer-Designed (1987)
Diameter: 305 mm
F/D ratio: F16.6
Focal length: 5060 mm
Length:
Mass:
Serial N:
Found: at www.ebay.com
Owner: sharp-ideas at www.ebay.com


Link to this lens: LZOS_APO_TMB_D304mm_F12_f3650mm_01
LZOS APO TMB D304mm F12 f3650mm 01 LZOS APO TMB D304mm F12 f3650mm 02

D=304 mm !


Manufactured by: LZOS (made in Russia)
Type: P304/12 Apochromatic for TMB Telescopes with OK-4 glass (fluorophosphate crown)
Diameter: 304 mm
F/D ratio: F12
Focal length: 3650 mm
Length:
Mass: 25 kg
Serial N: 002
Found: at www.lzos.ru
Owner: LZOS www.lzos.ru


Link to this lens: George_Observatory_D281mm_F15_f4215mm_01
George Observatory D281mm F15 f4215mm 01 George Observatory D281mm F15 f4215mm 02 George Observatory D281mm F15 f4215mm 03 George Observatory D281mm F15 f4215mm 04

D=281 mm !


Donated by: Preston and Donna Engebretson (Houston, Texas, USA) to the George Observatory
Type: ? (mounted on the Gueymard 36" (.9 meter) RC Tinsley Reflector) for visual observations
Diameter: 281 mm
F/D ratio: F15
Focal length: 4215 mm
Length:
Mass:
Found: at www.hmns.org
Owner: George Observatory at www.hmns.org


Link to this lens: Warner_and_Swasey_D280mm_F17.5_f4900mm_01
Warner & Swasey D280mm F17.5 f4900mm 01 Warner & Swasey D280mm F17.5 f4900mm 02 Warner & Swasey D280mm F17.5 f4900mm 03 Warner & Swasey D280mm F17.5 f4900mm 04

D=280 mm !


Manufactured by: Warner & Swasey (made in U.S.A.?)
Type: Achromatic Doublet for large Telescope
Diameter: 280 mm
F/D ratio: F17.5
Focal length: 4900 mm
Length:
Mass:
Found: at www.observa-dome.com
Owner: Mr. William T. Clark at www.observa-dome.com


Link to this lens: Leitz_Wetzlar_Epis_D280mm_F3.5_f1000mm_01
Leitz Wetzlar Epis D280mm F3.5 f1000mm 01 Leitz Wetzlar Epis D280mm F3.5 f1000mm 02 Leitz Wetzlar Epis D280mm F3.5 f1000mm 03 Leitz Wetzlar Epis D280mm F3.5 f1000mm 04 Leitz Wetzlar Epis D280mm F3.5 f1000mm 05 Leitz Wetzlar Epis D280mm F3.5 f1000mm 06

D=280 mm !


Manufactured by: Leitz Wetzlar (made in Germany)
Type: Epis (for Episcope)
Diameter: 280 mm (Outer: 350 mm)
F/D ratio: F3.5
Focal length: 1000 mm
Length: 1200 mm (with the tube)
Mass: 45 kg
Found: at eBay
Owner: at eBay


Link to this lens: Leitz_Wetzlar_Epis_D280mm_F3.5_f1000mm_11
Leitz Wetzlar Epis D280mm F3.5 f1000mm 11 Leitz Wetzlar Epis D280mm F3.5 f1000mm 12 Leitz Wetzlar Epis D280mm F3.5 f1000mm 13 Leitz Wetzlar Epis D280mm F3.5 f1000mm 14 Leitz Wetzlar Epis D280mm F3.5 f1000mm 15 Leitz Wetzlar Epis D280mm F3.5 f1000mm 16 Leitz Wetzlar Epis D280mm F3.5 f1000mm 17

D=280 mm !


Manufactured by: Leitz Wetzlar (made in Germany)
Type: Epis (for Episcope)
Diameter: 280 mm (Outer: 350 mm)
F/D ratio: F3.5
Focal length: 1000 mm
Length: -
Mass: >20 kg
Found: at eBay
Owner: kaiser_sousse at eBay


Link to this lens: Leitz_Wetzlar_Epis_D280mm_F3.5_f1000mm_21
Leitz Wetzlar Epis D280mm F3.5 f1000mm 21

D=280 mm !


Manufactured by: Leitz Wetzlar (made in Germany)
Type: Epis (for Episcope)
Diameter: 280 mm (Outer: 350 mm)
F/D ratio: F3.5
Focal length: 1000 mm
Length: -
Mass: >20 kg
Found: at eBay
Owner: turf12356 at eBay


Link to this lens: Leitz_Wetzlar_Epis_D271mm_F4.8_f1300mm_01
Leitz Wetzlar Epis D271mm F4.8 f1300mm 01 Leitz Wetzlar Epis D271mm F4.8 f1300mm 02 Leitz Wetzlar Epis D271mm F4.8 f1300mm 03 Leitz Wetzlar Epis D271mm F4.8 f1300mm 04 Leitz Wetzlar Epis D271mm F4.8 f1300mm 05

D=271 mm !


Manufactured by: Leitz Wetzlar (made in Germany)
Type: Epis (for Episcope)
Diameter: 271 mm (295 mm, Outer: 315 mm)
F/D ratio: F4.8
Focal length: 1300 mm
Length: 560 mm
Mass: 34 kg
Found: at eBay
Owner: beate.ha at eBay


Link to this lens: OASI_Merz_Refractor_D258mm_F15.1_f3894mm_01
OASI Merz Refractor D258mm F15.1 f3894mm 01 OASI Merz Refractor D258mm F15.1 f3894mm 02 OASI Merz Refractor D258mm F15.1 f3894mm 03 OASI Merz Refractor D258mm F15.1 f3894mm 04 OASI Merz Refractor D258mm F15.1 f3894mm 05

D=258 mm !


Manufactured by: OASI Merz (1872, made in UK?)
Type: Achromatic Doublet for the Tomline Refractor
Diameter: 258 mm
F/D ratio: F15.1
Focal length: 3894 mm
Length:
Mass:
Found: at www.ast.cam.ac.uk
Owner:Tomline Refractor at www.ast.cam.ac.uk


Link to this lens: Brashear_D254mm_F15_f3810mm_01
Brashear D254mm F15 f3810mm 01 Brashear D254mm F15 f3810mm 02

D=254 mm !


Manufactured by: John Alfred Brashear (Pittsburgh, Pennsylvania, made in U.S.A.)
Type: Flint-Forward Achromatic Air-Spaced Doublet for the Hartness Turret Telescope
Diameter: 254 mm
F/D ratio: F15
Focal length: 3810 mm
Length:
Mass:
Serial N:
Found: at stellafane.org
Owner: Jim Daley at stellafane.org


Link to this lens: DKD_D254F1800_D254mm_F7.1_f1800mm_01
DKD D254F1800 D254mm F7.1 f1800mm 01

D=254 mm !


Manufactured by: DKD optics co., ltd. (made in China)
Type: FH Achromat Doublet for Telescope (multilayer wideband coating)
Diameter: 254 mm
F/D ratio: F7.1
Focal length: 1800 mm
Length:
Mass:
Serial N:
Found: at eBay
Owner: diy_dkd at eBay


Link to this lens: DKD_D254F1375_D254mm_F5.5_f1375mm_01
DKD D254F1375 D254mm F5.5 f1375mm 01

D=254 mm !


Manufactured by: DKD optics co., ltd. (made in China)
Type: FH Achromat Doublet for Telescope (multilayer wideband coating)
Diameter: 254 mm
F/D ratio: F5.5
Focal length: 1375 mm
Length:
Mass:
Serial N:
Found: at eBay
Owner: diy_dkd at eBay


Link to this lens: Carl_Zeiss_refractor_D242mm_F14.8_f3580mm_01
Carl Zeiss refractor D242mm F14.8 f3580mm 01 Carl Zeiss refractor D242mm F14.8 f3580mm 02 Carl Zeiss refractor D242mm F14.8 f3580mm 03 Carl Zeiss refractor D242mm F14.8 f3580mm 04

D=242 mm !


Manufactured by: Carl Zeiss Jena (made in Germany)
Type: Achromatic Doublet for the Griffith Observatory (attached to a larger, 12" telescope)
Diameter: 242 mm
F/D ratio: F14.8
Focal length: 3580 mm
Length:
Mass:
Serial N:
Found: at www.lacity.org
Owner: Griffith Observatory www.lacity.org


Link to this lens: Alvan_Clark_Keystone_D242mm_F15_f3620mm_01
Alvan Clark, Keystone, D242mm F15 f3620mm 01 Alvan Clark, Keystone, D242mm F15 f3620mm 02 Alvan Clark, Keystone, D242mm F15 f3620mm 03 Alvan Clark, Keystone, D242mm F15 f3620mm 04

D=242 mm !


Manufactured by: Alvan Clark & Sons (Cambridgeport, MA, 1882, made in U.S.A.)
Type: Achromatic Doublet for the Keystone Observatory
Diameter: 242 mm
F/D ratio: F15
Focal length: 3620 mm
Length:
Mass:
Serial N:
Found: at www.keystone.edu
Owner: Keystone Observatory at www.keystone.edu


Link to this lens: Bausch_and_Lomb_Optical_D236mm_F18_f4267mm_01
Bausch and Lomb Optical, D236mm F18 f4267mm 01 Bausch and Lomb Optical, D236mm F18 f4267mm 02 Bausch and Lomb Optical, D236mm F18 f4267mm 03 Bausch and Lomb Optical, D236mm F18 f4267mm 04 Bausch and Lomb Optical, D236mm F18 f4267mm 05 Bausch and Lomb Optical, D236mm F18 f4267mm 06 Bausch and Lomb Optical, D236mm F18 f4267mm 07 Bausch and Lomb Optical, D236mm F18 f4267mm 08 Bausch and Lomb Optical, D236mm F18 f4267mm 09

D=236 mm !


Manufactured by: Bausch & Lomb Optical (made in U.S.A.)
Type: Achromatic Doublet for Telescope
Diameter: 236 mm
F/D ratio: F18.0
Focal length: 168 in (=4267 mm)
Length:
Mass: 37 kg
Serial N:
Found: at eBay
Owner: camcon101 at eBay


Link to this lens: Great-Eye_D230mm_F8_f1835mm_01
Great-Eye D230mm F8 f1835mm 01 Great-Eye D230mm F8 f1835mm 02

D=230 mm !


Manufactured by: Great-Eye
Type: Achromatic Doublet, Air-Spaced, BK7+F3(Schott), Fully-Multi-Coated (for Telescope)
Diameter: 230 mm
F/D ratio: F8
Focal length: 1835 mm
Length:
Mass:
Found: at www.mcse.hu
Owner: Attila SchnÚ yolo@chello.hu


Link to this lens: Great-Eye_D230mm_F8_f1835mm_11
Great-Eye D230mm F8 f1835mm 11 Great-Eye D230mm F8 f1835mm 12 Great-Eye D230mm F8 f1835mm 13

D=230 mm !


Manufactured by: Great-Eye?
Type: Achromatic Doublet, Air-Spaced, Fully-Multi-Coated (for Telescope)
Diameter: 230 mm (outer: 254 mm)
F/D ratio: F8
Focal length: 1835 mm?
Length:
Mass: 6.5 kg
Found: at eBay
Owner: avalondac at eBay


Link to this lens: Brashear_D229mm_F14.6_f3327mm_01
Brashear D229mm F14.6 f3327mm 01 Brashear D229mm F14.6 f3327mm 02 Brashear D229mm F14.6 f3327mm 03 Brashear D229mm F14.6 f3327mm 04

D=229 mm !


Manufactured by: John Alfred Brashear (Pittsburgh, Pennsylvania, made in U.S.A.)
Type: Flint-Forward Achromatic Air-Spaced Doublet for a large Astronomical Telescope
Diameter: 229 mm
F/D ratio: F14.6
Focal length: 3327 mm
Length:
Mass:
Serial N:
Found: at www.stephensobservatory.org
Owner: Stephens Memorial Observatory at the Stephens Memorial Observatory


Link to this lens: Perkin-Elmer_Type_I_Aerial_D228mm_F4_f914mm_01
Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 01 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 02 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 03 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 04 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 05 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 06 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 07 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 08 Perkin-Elmer, Type I Aerial, D228mm F4 f914mm 09

D=228 mm !


Manufactured by: The Perkin-Elmer Corp., (Norwalk, Conn., made in U.S.A.)
Type: Type I Aerial Camera Lens
Diameter: 228 mm
F/D ratio: F4
Focal length: 36 in (=914 mm)
Length:
Mass: > 150 kg
Serial N: 038
Found: at eBay
Owner: mikeyd412000 at eBay


Link to this lens: Great-Eye_D222mm_F12_f2700mm_01
Great-Eye D222mm F12 f2700mm 01 Great-Eye D222mm F12 f2700mm 02 Great-Eye D222mm F12 f2700mm 03 Great-Eye D222mm F12 f2700mm 04 Great-Eye D222mm F12 f2700mm 05 Great-Eye D222mm F12 f2700mm 06

D=222 mm !


Manufactured by: Great-Eye
Type: Achromatic Doublet, Air-Spaced, BK7+F3(Schott), Fully-Multi-Coated (for Telescope)
Diameter: 222 mm
F/D ratio: F12
Focal length: 2700 mm
Length:
Mass:
Found: at eBay
Owner: Great-Eye ebay


Link to this lens: Ken_Dauzat_D222mm_F12_f2700mm_1
Ken Dauzat D222mm F12 f2700mm 1 Ken Dauzat D222mm F12 f2700mm 2

D=222 mm !


Manufactured by: ?
Type: Achromatic Doublet, Air-Spaced, BK7+F3(Schott), Fully-Multi-Coated (for Telescope)
Diameter: 222 mm
F/D ratio: F12
Focal length: 2700 mm
Length:
Mass:
Found: at www.kendauzat.net
Owner: Ken Dauzat sales@kendauzat.net


Link to this lens: Canon_Big_Guy_D214mm_F5.6_f1200mm_01
Canon_Big_Guy_D214mm_F5.6_f1200mm_01 Canon_Big_Guy_D214mm_F5.6_f1200mm_02 Canon_Big_Guy_D214mm_F5.6_f1200mm_03 Canon_Big_Guy_D214mm_F5.6_f1200mm_04 Canon_Big_Guy_D214mm_F5.6_f1200mm_05 Canon_Big_Guy_D214mm_F5.6_f1200mm_06 Canon_Big_Guy_D214mm_F5.6_f1200mm_07 Canon_Big_Guy_D214mm_F5.6_f1200mm_08 Canon_Big_Guy_D214mm_F5.6_f1200mm_09 Canon_Big_Guy_D214mm_F5.6_f1200mm_09 Canon_Big_Guy_D214mm_F5.6_f1200mm_0a Canon_Big_Guy_D214mm_F5.6_f1200mm_0b Canon_Big_Guy_D214mm_F5.6_f1200mm_0c Canon_Big_Guy_D214mm_F5.6_f1200mm_0d

D=214 mm


Manufactured by: Canon
Type: "Big Guy", Apochromatic, 13 lens in 10 groups (for Telephoto)
Diameter: 214 mm
F/D ratio: F5.6
Focal length: 1200 mm
Length:
Mass:
Found: at www.dvinfo.net/canon
Owner: Dave Metz, Chris Hurd chris@dvinfo.net


Link to this lens: ISTAR_Optical_Achromat_D210mm_F9_f1890mm_01
ISTAR Optical Achromat D210mm F9 f1890mm 01

D=210 mm


Manufactured by: Istar Optical (Arizona, made in EU and U.S.A.)
Type: Achromat for Telescope, MultiCoated
Diameter: 210 mm
F/D ratio: F9
Focal length: 1890 mm
Length:
Mass:
Serial N:
Found: at www.cloudynights.com
Owner: ISTAR Optical at www.cloudynights.com


Link to this lens: HongKong_FH_Achromat_D210mm_F5.7_f12000mm_01
HongKong, FH Achromat, D210mm F5.7 f12000mm 01 HongKong, FH Achromat, D210mm F5.7 f12000mm 02 HongKong, FH Achromat, D210mm F5.7 f12000mm 03 HongKong, FH Achromat, D210mm F5.7 f12000mm 04 HongKong, FH Achromat, D210mm F5.7 f12000mm 05 HongKong, FH Achromat, D210mm F5.7 f12000mm 06

D=210 mm


Manufactured by: unknown (made in HongKong)
Type: FH Achromat, MgF2 coating (lightblue)
Diameter: 210 mm
F/D ratio: F5.7
Focal length: 1200 mm
Length:
Mass: 4.9 kg (full OTA: 13.55 kg)
Serial N: 1
Found: at E-Mail
Owner: Hansfoto@live.nl E-mail


Link to this lens: DKD_D210F1800_D210mm_F8.6_f1800mm_01
DKD D210F1800 D210mm F8.6 f1800mm 01

D=210 mm


Manufactured by: DKD optics co., ltd. (made in China)
Type: FH Achromat Doublet for Telescope (multilayer wideband coating)
Diameter: 210 mm
F/D ratio: F8.6
Focal length: 1800 mm
Length:
Mass:
Serial N: 1
Found: at eBay
Owner: diy_dkd at eBay


Link to this lens: DKD_D210F1200_D210mm_F5.7_f1200mm_01
DKD_D210F1200_D210mm_F5.7_f1200mm 01

D=210 mm


Manufactured by: DKD optics co., ltd. (made in China)
Type: FH Achromat Doublet for Telescope (single antireflection film)
Diameter: 210 mm
F/D ratio: F5.7
Focal length: 1200 mm
Length:
Mass:
Serial N: 1
Found: at eBay
Owner: diy_dkd at eBay


Link to this lens: Precision_Optics_DCX_D210mm_F3_f635mm_01
Precision Optics DCX D210mm F3 f635mm 01

D=210 mm


Manufactured by: Precision Optics
Type: DCX (Double-Convex)
Diameter: 210 mm
F/D ratio: F3
Focal length: 635 mm
Length:
Mass:
Found: at eBay
Owner: surplusshed at eBay


Link to this lens: Leitz_Wetzlar_Epis_D208mm_F4.8_f1000mm_01
Leitz Wetzlar Epis D208mm F4.8 f1000mm 01 Leitz Wetzlar Epis D208mm F4.8 f1000mm 02 Leitz Wetzlar Epis D208mm F4.8 f1000mm 03

D=208 mm


Manufactured by: Ernst Leitz GmbH Wetzlar (made in Germany)
Type: Epis (for Episcope)
Diameter: 208 mm
F/D ratio: F4.8
Focal length: 1000 mm
Length: 470 mm
Mass: 17 kg
Found: at eBay
Owner: 5759walter at eBay


Link to this lens: LZOS_APO_TMB_D203mm_F6.9_f1420mm_01
LZOS APO TMB D203mm F6.9 f1420mm 01 LZOS APO TMB D203mm F6.9 f1420mm 02 LZOS APO TMB D203mm F6.9 f1420mm 03 LZOS APO TMB D203mm F6.9 f1420mm 04 LZOS APO TMB D203mm F6.9 f1420mm 05 LZOS APO TMB D203mm F6.9 f1420mm 06

D=203 mm


Manufactured by: LZOS (made in Russia)
Type: P203/6.9 Apochromatic, TMB design for Telescopes with OK-4 glass (fluorophosphate crown)
Diameter: 203 mm
F/D ratio: F6.9
Focal length: 1420 mm
Length:
Mass:
Serial N: 002
Found: at www.astromart.com
Owner: APM-Telescopes www.astromart.com


Link to this lens: LZOS_APO_TMB_D203mm_F9_f1827mm_01
LZOS APO TMB D203mm F9 f1827mm 01 LZOS APO TMB D203mm F9 f1827mm 02 LZOS APO TMB D203mm F9 f1827mm 03 LZOS APO TMB D203mm F9 f1827mm 04

D=203 mm


Manufactured by: LZOS (made in Russia)
Type: P203/9 Apochromatic (Triplet, Oil-Gap), TMB design for Telescopes with OK-4 glass (fluorophosphate crown)
Diameter: 203 mm
F/D ratio: F9
Focal length: 1827 mm
Length:
Mass:
Serial N:
Found: at astro.uni-tuebingen.de
Owner: Wolfgang Grzybowski at astro.uni-tuebingen.de/%7Egrzy/index.html


Link to this lens: TravelStar_ED_Aspherical_D203mm_F5.9_f1200mm_01
TravelStar ED Aspherical D203mm F5.9 f1200mm 01 TravelStar ED Aspherical D203mm F5.9 f1200mm 02 TravelStar ED Aspherical D203mm F5.9 f1200mm 03 TravelStar ED Aspherical D203mm F5.9 f1200mm 04

D=203 mm


Manufactured by: TravelStar? (made in ?)
Type: TravelStar ED Aspherical for fast Telescope, EFMC multicoatings
Diameter: 203 mm
F/D ratio: F5.9
Focal length: 1200 mm
Length:
Mass:
Serial N:
Found: at 216.92.113.163
Owner: Travel Star 216.92.113.163


Link to this lens: Intane-Optics_Achromatic_D203mm_F9_f1827mm_01
Intane-Optics Achromatic D203mm F9 f1827mm 01

D=203 mm


Manufactured by: Intane Optics (made in China)
Type: Air-Spaced Achromatic Doublet for large Telescope, Multilayer Broadband Anti-Reflection Coating
Diameter: 203 mm
F/D ratio: F9
Focal length: 1827 mm
Length:
Mass:
Serial N:
Found: at www.intane-optics.com
Owner: intane-optics at www.intane-optics.com


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