Welcome to Delta

In 2021 the Digital Enlarger Lens Test Archive (D.E.L.T.A) outgrew its original home at 16-9.net – and its remit. It continues to expand, and is now the most wide-ranging resource for film-makers and photographers seeking and using enlarger, projector, macro, repro, process and cine lenses to create digital work. Spanning 130 years, Delta collates information about almost 3,500 universally-adaptable lenses, and contains hundreds of unique reviews and articles.

The quick-browse catalogue below orders every lens by manufacturer and can be filtered by category or keyword.

The primary archive tracks generations of lenses with more in-depth information, and ranks hundreds for sharpness and rendition. Please use the main menu and search function to access further articles, pictures and videos.

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Wollensak Micro-Raptar 90/4.5
Macro lens. Black body.

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Wollensak Oscillo-Raptar 75/1.9
American oscilloscope/projector lens marked 3” 1:0.85x fitted to Tektronix C12. Sometimes sold in shutter. Image circle: 70mm.

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Wollensak Oscillo-Raptar 88/1.4
American oscilloscope/projector lens marked 3.5” 1:1. Sometimes sold in shutter.

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Wollensak Pro Raptar 100/4
American Plasmat enlarger lens.

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Wollensak Pro Raptar 101/5.6
American Plasmat enlarger lens marked 4”. Silver body, black fascia.

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Wollensak Pro Raptar 114/5.6
American Plasmat enlarger lens marked 4.5”

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Wollensak Pro Raptar 135/5.6
American Plasmat enlarger lens marked 5 3/8”. Silver body, black fasica.

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Wollensak Pro Raptar 162/5.6
American Plasmat enlarger lens marked 6 / 3.8”. Silver body, black fascia.

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Wollensak Pro Raptar 190/5.6
American Plasmat enlarger lens marked 7.5”. Silver body, black fascia.

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Wollensak Pro Raptar 50/4
American Plasmat enlarger lens marked 2”. Silver body, black fascia.

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Wollensak Pro Raptar 90/4.5
American Plasmat enlarger lens marked 3.5”. Silver body, black fascia.

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Wollensak Process Raptar 260/10
Process lens. Silver body. Black fascia.

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Wollensak Process Raptar 355/10
Process lens. Silver body. Black fascia.

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Wollensak Process Raptar 406/10
Process lens. Silver body. Black fascia.

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Wollensak Process Raptar 482/10
Process lens. Silver body. Black fascia.

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Wollensak Process Raptar 635/10
Process lens. Silver body. Black fascia.

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Wollensak Projection Amaton 241/4.5
Graphic projector lens.

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Wollensak Projection Anastigmat 127/3.5
Fitted to Revere Automatic slide projector. Marked 5”

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Wollensak Raptar Copy 108/6.3
Copy / macro lens optimised for 1:1 marked 4.25”. Silver body, black fascia.

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Wollensak Raptar Copy 190/4.5
American copy / proces lens marked 7.5”. All silver body. Marked Raptar only.

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Wollensak Raptar Copy 209/4.5
American copy / proces lens marked 8.25”. Zebra aperture ring.

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Wollensak Raptar Copy 209/5.6
American copy / proces lens marked 8.25”. All black. Smooth barrel.

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Wollensak Raptar Copy 209/6.3
American copy / proces lens marked 8.25”. All black.

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Wollensak Raptar Copy 210/4.5
Copy / macro lens optimised for 1:1 marked 8.25”. Silver body, black fascia.

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Wollensak Velostigmat 50/2.8
American enlarger lens marked 2”. Mounts vary (Leica option). Silver body. Black nose. Single ‘Wocoted’. Lens supplied by The Real Camera Co.

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Wollensak Vinco Anastigmat 178/6.8
American enlarger lens marked 7”

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Wray 64/0.71

Thorium lens developed by Charles G. Wynne for CRT/X-ray use for mass TB screening. Early medical versions marked ’16:1 REDUCING’ to indicate transfer to 16mm film. Later versions seen in different mounts for industrial use.

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Wray Apo Process Lustrar 450/10
Apochromatic dialyt process lens marked 18”. High res, low contrast.

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Wray ApoProcess Lustrar 375/10
Apochromatic dialyt process lens marked 15”. High res, low contrast.

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Wray ApoProcess Lustrar 625/10
Apochromatic dialyt process lens marked 25”. High res, low contrast.

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Wray Cine Unilite 133/1.9
English cine projector lens marked 5.25”. Brass body.

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Wray Copying 75/2.8
Copy lens optimised for 1:1. Black body.

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Wray CRT Copy 50/1
Copy / macro lens

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Wray Lustrar 152/4.5
English enlarger lens marked 6”

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Wray Lustrar 178/5.6
English enlarger lens marked 7”

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Wray Lustrar 184/4.5
English enlarger lens marked 7.25”

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Wray Lustrar 203/5.6
English enlarger lens marked 8.5”

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Wray Lustrar 215/6.3
English enlarger lens marked 8.5”

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Wray Lustrar 82/5.6
English enlarger lens marked 3.25”

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Wray Process Lustrar 300/10
Process lens marked 12”. Apertures unmarked.

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Wray Process Lustrar 325/10
Process lens marked 13”. Apertures unmarked.

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Wray Process Lustrar 375/10
Process lens marked 15”. Apertures unmarked.

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Wray Process Lustrar 450/10
Process lens marked 18”. Apertures unmarked.

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Wray Process Lustrar 525/10
Process lens marked 21”. Apertures unmarked.

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Wray Process Lustrar 625/10
Process lens marked 25”. Apertures unmarked.

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Wray Projection Anastigmat 85/2.8
Slide projector lens for Rank Hylite/Firefly and Moth. Marked Ref 262531.

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Wray Supar 102/3.5
Low contrast enlarger lens marked 4”. Rampant SA but OK resolution.Trippy look.

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Wray Supar 102/4.5
English enlarger lens marked 4”. Black body, silver aperture ring. Some versions max f32?

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Wray Supar 127/4.5
English enlarger lens marked 4.25”.

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Wray Supar 140/4.5
English enlarger lens marked 5.5”.

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Wray Supar 178/4.5
English enlarger lens marked 7”.

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Wray Supar 50/3.5
English enlarger lens marked 2”

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Wray Supar 50/4.5
Anastigmat English enlarger lens marked 2” (1930s version)

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Wray Supar 75/3.5
English enlarger lens marked 3”.

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Wray Supar 82/3.5
English enlarger lens marked 3.25”.

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Wray Supar 82/4.5
English enlarger lens marked 3.25”. Black body, silver aperture ring. Some versions max aperture f32?

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Wray Supar II 127/4.5 [V1]
Updated Supar enlarger lens with rare-earth glass. Single coated. Marked 4.25”

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Wray Supar II 127/4.5 [V2]
English enlarger lens marked 4¼”. Black body, silver aperture ring.

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Wray Supar II 127/4.5 [V3]
Updated Supar enlarger lens with rare-earth glass. Single coated. Marked 4.25”. Rehoused in silver/brass aperture ‘jacket’.

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Wray Supar II 152/4.5
Updated Supar enlarger lens with rare-earth glass. Single coated. Marked 6”

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Wray Supar II 178/4.5
Updated Supar enlarger lens with rare-earth glass. Single coated. Marked 7”

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Wray Supar II 50/3.5
Updated Supar enlarger lens with rare-earth glass. Single coated. Marked 2”

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Wray Supar II 50/4.5
Updated Supar enlarger lens with rare-earth glass. Single coated. Marked 2”

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Wray Supar II 82/4.5
Updated Supar enlarger lens with rare-earth glass. Single coated. Marked 3.25”

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Wray Supar III 127/4.5
Single coated enlarger lens with rare-earth glass. Black mount, white aperture ring, scalloped nose. Marked 4.25”

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Wray Supar III 35/3.5
Single coated enlarger lens with rare-earth glass. Black mount, white aperture ring, scalloped nose.

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Wray Supar III 50/3.5
Single coated enlarger lens with rare-earth glass. Black mount, white aperture ring, scalloped nose. Marked 2”

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Wray Supar III 50/4.5
Single coated enlarger lens with rare-earth glass. Black mount, white aperture ring, scalloped nose. Marked 2”

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Wray Supar III 82/4.5
Single coated enlarger lens with rare-earth glass. Black mount, white aperture ring, scalloped nose. Marked 3.25”

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Wray Wide Angle 178/6.3
English enlarger lens marked 7”.

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Yamasaki E-Congo 105/5.6
Japanese enlarger lens.

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Yamasaki E-Congo 135/4.5 [V1]
Japanese enlarger lens.

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Yamasaki E-Congo 135/4.5 [V2]
Brass-body Japanese enlarger lens.

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Yamasaki E-Congo 135/5.6
Japanese enlarger lens.

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Yamasaki E-Congo 150/4.5
Tokyo-made all-black enlarger lens. Part of a seven-lens range, mostly four-element.

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Yamasaki E-Congo 50/3.5
Japanese enlarger lens.

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Yamasaki E-Congo 75/4.5
Japanese enlarger lens.

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Yamasaki E-Congo Jr 35/3.5
AKA Vivitar, AICO-PSL, Samigon enlarger lens. 30mm image circle. Product image by SubClub.

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Yamasaki E-Congo Jr 75/3.5 [V1]
AKA Vivitar, AICO-PSL, Samigon enlarger lens.

Yamasaki E-Congo Jr 75/3.5 [V2]
AKA Vivitar, AICO-PSL, Samigon enlarger lens.

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Yamasaki E-Congo Jr 75/3.5 [V3]
AKA Vivitar, AICO-PSL, Samigon enlarger lens.

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Yashica 40/3.5
AKA Hoya / Osawa Tominon / Bogen / DO Industries enlarger lens

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Yashica 50/2.8
AKA Hoya / Osawa Tominon / Bogen / Beseler ColorPro / Omicron EL enlarger lens.

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Yashica 75/4.5
AKA Hoya / Osawa Tominon / Bogen / Beseler ColorPro / Omicron EL enlarger lens.

E-Yashinon-DX 21 mm f/3.5

Yashica E-Yashinon-DX 21/3.5
Enlarger lens likely made by Tomioka. Part of Atoron ENLA-Unit

(Tomioka) Yashinon 32 mm f/3.5

Yashica Yashinon 32/3.5
Industrial lens likely made by Tomioka.

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Zeiss-Ikon Super-Talon 90/2.5
Multicoated lens for Zeiss Ikon Royal slide projectors. Appears to be early single-coated version of Zeiss Super Talon (note different hyphenation). Images by Vintageglas.

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Zenobia E.Hesper 50/3.5
Japanese enlarger lens. After 1956, Daiichi Kōgaku K.K became known as Zenobia Kōgaku K.K.

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Zett Fafix Anastigmat 80/3.5
Projector lens marked Zett-Projektion Braunschweig. Black body.

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Zett Super Talon 60/2.8
Multicoated lens for Zeiss Ikon Ikolux / Perkeo slide projectors

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Zett Super Talon 90/2.5
Multicoated lens for Zeiss Ikon Ikolux / Perkeo slide projectors

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Zett Super Zettar 85/2.5
Slide Projector lens marked Zett-Projektion Braunschweig. Silver body, black nose.

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Zett Talon 85/2.8 [V1]
Multicoated lens for Zeiss Ikon Ikolux / Perkeo slide projectors. Probably AKA Zeiss Ikon Talon.

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Zett Zettar 100/2.8
Slide projector lens. Silver metal body marked Zett Projektion Braunzweig.

Zett Zettar 150mm f3.0 c

Zett Zettar 150/3.0
Medium format slide projector lens fitted to Zett 66. Silver metal body marked Zett Projektion Braunzweig.

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Zett Zettar 85/3
Slide projector lens with black plastic body marked Zett Projektion Braunzweig. White fascia.

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ZKBK OKP2 60/2
Russian projector lens.
1 32 33 34 35

Acknowledgements: The DELTA project wouldn’t have been possible with the naysaying of experienced lens collectors; the death of film; the opposition of my wife; the embezzlement of shady eBay sellers and Japanese auction agents; the re-branders; the same 50/3.5 seen in a thousand guises; the unhelpful attitide of extant manufacturers who jettisoned their history without a backward glance (Schneider, Rodenstock et al); the corporations who swallow the legacies of decades without concern for their preservation; the disregard of librarians and archivists who no longer value photographic publications; the copyright laws prohibiting reproduction of adverts advertising things no longer made, once made by people and companies that no longer exist; the museums failing to digitise their collections and refusing to grant access to material rotting unseen in their basements; the sheer bloody-mindedness of Agfa serial numbers; the arrogance of those who have previously written about alt.lenses and imagine their sayings to be unalterably definitive, despite being patently erroneous;  widespread dementia and death befalling a generation of those with inside knowledge of the industry; widespread withering of the information internet and the rise of regurgitated AI gobbledygook; the majority of used camera dealers who regard these lenses as pointless relics and have no interest in deploying them as taking lenses and regard their slow-moving stock as an irritation; clueless marketing people devoid of specific product knowledge; an overwhelming majority of photographers apathetic about the benefits and possibilities of alt.lenses; the publishers who failed to express an interest in a book deal; the army of DIY botchers who took their lenses apart and didn’t know how to put them back together again; a postal system that loses packages as a normal happenstance;  and all the fungus. Against this tide stand we few. You know who you are. Thank you.