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 more than 170 years, Delta collates information on almost 4,000 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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[Actina] Natar 105/4.5
Imported to UK from Belgium fitted to Actina Naritar enlarger. Covers up to 6×9.
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[Actina] Natar 60/4.5
Imported to UK from Belgium fitted to Actina Naritar enlarger.
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[Actina] Natar 75/4.5
Imported to UK from Belgium fitted to Actina Naritar enlarger. Covers up to 6×6.
agfa-repromaster-213-a
[Agfa] Repromaster 213/9.25
Plasmat repro lens made by Staeble (Ultragon) for Repromaster system. Optimised for 2:1-1:2. AKA Eskofot, Helioprint
agfa-repromaster-80a
[Agfa] Repromaster 80/4
Plasmat repro lens.
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[BelOMO] 35KP [35KП] 120/1.8
Planar projector lens. Coatings vary. Actual FL reported as 140mm. AKA ‘Portrait’. Made in Belarus.
Lomo MMZ 100mm f1.8
[BelOMO] 35KП [35KP] 100/1.8 [V1]
Russian planar projector lens. Black body. Zebra nose. Single-coated. AKA ‘Portrait’. Made in Belarus.
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[BelOMO] 35KП [35KP] 100/1.8 [V2]
Russian planar projector lens. Black metal barrel. Multicoated. AKA ‘Portrait’. Made in Belarus.
35KP 140mm f1.8 Petzval Projection Lens
[BelOMO] 35KП 140/1.8 [35KP Aplanat]
Multicoated Petzval projector lens made in Belarus by BelOMO (formerly MMZ). Updated version of KO140M. Black metal casing. Focal-flange distance was measured from rear of barrel: rear elelement is recessed c.5mm. Barrel engraved with GOST Certificate 3840-79. Not to be confused with the superior, later Planar version.
MMZ Belomo 35KP 140mm f1.8 Projector Lens
[BelOMO] 35KП 140/1.8 [35KP Planar]
Multicoated Planar projector lens made in Belarus by BelOMO (formerly MMZ), sometimes referred to as the Lomo ‘Portrait’ lens. Black metal barrel; grey metal nose with crackle finish. Focal-flange distance was measured from rear of barrel: rear elelement is recessed c.35mm. Barrel is engraved with GOST Certificate 3840-79. Not to be confused with the inferior (earlier) Aplanat version.
MMZ KO-140M 140mm f1.8 projector lens
[BelOMO] KO-140M 140/1.8 [V1]
Single-coated Aplanat projector lens made in Belarus by BelOMO (formerly MMZ). Black metal casing. [V1] appears only cosmetically different to [V2] but has different serial scheme. Superceded by 35KP series.
MMZ KO-140M 140mm f1.8 projector lens
[BelOMO] KO-140M 140/1.8 [V2]
Multicoated Aplanat projector lens made in Belarus by BelOMO (formerly MMZ). Black metal casing. Appears identical to the Aplanat (but not the Planar) version of the BelOMO 35KП.
85-color-corrected-1
[Boots] 85/2.8 Colour Corrected
Unbranded plastic-barrel lens made in Hong Kong for the Irish-made Boots 2400S and 2400RF 35mm slide projectors. AKA Hanimar 85mm [V2].
braun_super-paxon-100-v1z
[Braun] Super-Paxon 100/2.8
Fitted to Braun Paximat International 1850 / Special Novamat projectors. Made by Wilhelm Will.
autocrat-75e
[Dixons] Autocrat 75/3.5 [V1]
Black enlarger lens made in Japan. AKA Berophot, Perfex.
fujimoto-elucky-80-a
[Fujimoto] E-Lucky 80/4.5
Japanese enlarger lens. Identical to Fujimoto-branded 80/4.5.
sakura-135a
[Konishiroku] Sakura 135/6.3
Rare Japanese enlarger lens, possibly pre-1945, marked “ROKUOH-SHA”. Konishiroku cannot positively be identified as the maker.
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[Konishiroku] Sakura 80/6.3
Rare Japanese enlarger lens, possibly pre-1945. Konishiroku cannot positively be identified as the maker.
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[Meyer Optik] Diaplan 55/4.5
Enlarger lens fitted to original (Filmosto?) Manufoc cited in the CIA’s 1955 ‘Publication of the East German Chamber of Foreign Trade’. Likely precursor of the Helioplan.
Corona 75mm f3.5-a
[Minette] Corona 75/3.5
Silver and black metal Japanese enlarger lens. Probably AKA Minette Corona, Minette, Dixons Autocrat Deluxe and Kaginon. Product image and review by Thomas Lövgren.
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[Minolta] Chiyoko E. Rokkor 50/4.5 [V1]
Japanese enlarger lens. Silver body.
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[Minolta] Chiyoko E.Rokkor 75/4.5 [V1]
Silver Japanese enlarger lens. Single-coated.
Minolta Chiyoko 75mm f4.5 [V2]
[Minolta] Chiyoko E.Rokkor 75/4.5 [V2]
Chromed Japanese enlarger lens with black fascia.
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[Minolta] Chiyoko Rokkor 75/3.5 [V1]
Silver Japanese enlarger lens. Single-coated.
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[Minolta] Chiyoko Rokkor 75/3.5 [V2]
Chromed Japanese enlarger lens. Black fascia and mount. Single-coated.
omicron-el-50mm-f2.8a
[Omega] Omicron-EL 50/2.8
Rebranded Japanese enlarger lens AKA Osawa Tominon EL / Yashica / Hoya / Beseler Color Pro (pre-1985).
omicron-el90-a
[Omega] Omicron-EL 90/5.6
AKA Osawa Tominon / Yashica / Hoya / Beseler ColorPro enlarger lens.
el-omegar-50c
[Simmon Omega] EL-Omegar 50/3.5
Single-coated lens made in Japan by Komura for Omega enlargers. [Cat L455-110]. AKA Berkey EL-Omegar 50/3.5. Superceded by Rodenstock EL-Omegar 50/3.5 [Cat 455-110].
el-omegar-75-b
[Simmon Omega] EL-Omegar 75/3.5
Single-coated lens made in Japan by Komura for Omega enlargers. AKA Simmon and Omegar. [Cat. L455-111]. Superceded by Rodenstock EL-Omegar 75/3.5 [Cat 455-111].
copal-e90-115mm-f4.5-a
[Tomioka] Copal E-90 115/4.5
Multicoated fixed aperture enlarger lens. Probably AKA [Tomioka] E90C.
[Tomioka] Copal E18C 35/4
Industrial lens made by Tomioka.
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[Tomioka] Copal E18C 40/4
Industrial lens made by Tomioka.
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[Tomioka] Copal-E36 60/4
Multicoated mini-lab enlarger lens made by Tomioka. Markings vary (some Tominon-Copal and/or MC).
Copal E36C 76 mm f/4
[Tomioka] E36 76/4
Multicoated mini-lab enlarger lens made by Tomioka. Markings vary (some Tominon-Copal and/or MC).
tominon-e36C-68mm_f4-a
[Tomioka] E36C 68/4
Fixed aperture multicoated enlarger lens made by Tomioka for Noritsu mini-lab. Not all samples marked Tominon, Copal and/or C.
tomioka_e36c-86mm_f4
[Tomioka] E36C 86/4
Fixed aperture multicoated enlarger lens made by Tomioka for Noritsu mini-labs. Not all samples marked Tominon and/or C.
Copal E66C 94.1 mm f/4
[Tomioka] E66C 94.1/4
Fixed aperture optical printing lens (minilab) made in Japan. Manufacturer (likely Tomioka) and aperture unmarked.
Copal E90C 105 mm f4.5
[Tomioka] E90C 105/4.5
Fixed aperture optical printing lens (minilab) made in Japan. Manufacturer (likely Tomioka) and aperture unmarked.
Copal E90C 115 mm f4.5
[Tomioka] E90C 115/4.5
Fixed aperture optical printing lens (minilab) made in Japan. Multicoated. Manufacturer (likely Tomioka) and aperture unmarked. Probably AKA Copal E-90. Images by simple.joy >
wilhelm-will-maginon-100mm-f2.5-a
[Wilhelm] Will Maginon 100/2.5
Projector lens marked ‘WILL,Wetzlar’. Lanthanum glass. Metal barrel / black fascia. AKA Gnome, Agomar, Adox Maginon.
will-maginon-100-2.8-b
[Wilhelm] Will Maginon 100/2.8 [V1]
Projector lens marked ‘WILL,WETZLAR’. Lanthanum glass. AKA Gnome, Agomar, Adox Maginon. Main product image and weighing by Van Eck.
maginon-85-2.5a
[Wilhelm] Will Maginon 85/2.5
Fast Maginon projector lens with additional meniscus front lens. Lanthanum glass. Metal body marked ‘Will, Wetzlar’.
wilhelm-will-maginon-90mm-f2.5-a
[Wilhelm] Will Maginon 90/2.5
Projector lens marked ‘WILL,WETZLAR’. All black metal barrel.
zeiss-kinostar-iii-70mm-a
[Zeiss] Ikon Kinostar III 70mm
Projector lens marked with arrow and ‘Zeiss Ikon A-G Dresden f=9.5cm”. Silver barrel (smaller than 62.5mm), black nose. Images by Emin Lapa >
zeiss-ikon-orikar-100mm-early
[Zeiss] Ikon Orikar 100/2.5 [V1]
Slide projector lens for Aviso series marked “Ikon Orikar f=10cm”. Aperture unmarked but listed in catalogues from 1952-c.1959 as f2.5 [Cat 1478/06].
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A. Darlot (Paris) 160/3.5
Projector lens. Brass body
travegar-105-v1a
A. Schacht R Travegar 105/3.5 [V1]
Early Munich-manufactured enlarger/macro lens. Silver body. Black nose. Tends to rust.
travegar_105a
A. Schacht R Travegar 105/3.5 [V2]
Updated Ülm-manufactured enlarger/macro lens. Silver body. Black nose. Tends to rust.
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A. Schacht R Travegar 50/3.5
Enlarger lens. f16 version. Possibly made in Munich 1948-1954.
a-schacht-r-travegar-50
A. Schacht R Travegar 50/3.5 [Ulm]
Enlarger lens. Silver body. Black nose. Late period Ulm-produced (1954-1967) f22 version.
travegar_75a
A. Schacht R Travegar 75/3.5
Enlarger lens. Silver body. Black nose. Ulm produced (1954-1967).
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schacht_super-stellar-100-2.5a
A. Schacht Super-Stellar 100/2.5
Slide projector lens. Black plastic body with zebra nose. Likely co-production with Staeble/Wilhelm Will. Images by Forest Sprite.
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A. Schacht Super-Stellar 85/2.5 [V1]
Slide projector lens. Silver metal body with zebra nose. Likely co-production with Staeble/Wilhelm Will.
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A. Schacht Super-Stellar 85/2.5 [V2]
Slide projector lens. All-black barrel. Likely co-production with Staeble/Wilhelm Will.
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A. Schacht Travegar 100/3.3
Zebra bellows lens.
schacht_travegar-50-e
A. Schacht Travegar 50/3.5 [Munich]
Enlarger lens. Silver body. Black nose. Red diamond instead of R marking. Early Munich-produced version.
schacht_travegar-50a
A. Schacht Travegar 50/3.5 [Ulm]
Enlarger lens. Silver body. Black nose. Red diamond instead of R marking. Late Ulm-produced f22 version (low serials).
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A. Schacht Travegon 35/2.8
Enlarger lens. Silver body. Black nose.
travenon_135a
A. Schacht Travenon 135/4.5
Enlarger lens. Silver body. Black nose. Tends to rust.
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A. Schacht Travenon 17/1.4
Cine projector lens. Black body. Silver nose. Image circle < 25mm at infinity.
a-schacht-travenon-85a
A. Schacht Travenon 85/2.8
Slide projector lens. Black body. Zebra nose.
a-schacht-travenon-85-4.5a
A. Schacht Travenon 85/4.5
Enlarger lens. Silver body. Black nose. Sometimes seen fitted to M42 extension tube. Ulm-made models from 1954-1967.
accura-90mm-c
Accura [Dia-Lite] 90/4.5 [V1]
Japanese enlarger lens distributed by RH-Div Interphoto USA.
accura-dialite-90-d
Accura [Dia-Lite] 90/4.5 [V2]
Japanese enlarger lens distributed by RH-Div Interphoto USA.
accura-anastigmat-135mm-f4.5-a
Accura 135/4.5
Japanese-made zebra enlarger lens marked Anastigmat.
accura-150mm-a
Accura 150/4.5
Japanese-made enlarger lens marked Anastigmat.
accura-35-a
Accura 35/3.5
Japanese enlarger lens marked Anastigmat ditributed by RH-Div Interphoto USA. Image circle unknown – likely c.30mm.
accura-50mm_v1-a
Accura 50/3.5 [V1]
Japanese enlarger lens marked Anastigmat. Black nose; silver mount.
accura-50-a
Accura 50/3.5 [V2]
Enlarger lens listed in 1976 Popular Photography catalogue supplied by RH-Div Interphoto USA.
accura-50-v3a
Accura 50/3.5 [V3]
Zebra enlarger lens listed in 1976 Popular Photography catalogue supplied by RH-Div Interphoto USA. Marked F=2″.
accura-50mm-3d2
Accura 50/3.5 [V4]
Enlarger lens listed in 1976 Popular Photography catalogue supplied by RH-Div Interphoto USA. Unserialled Japanese Zebra.
accura-75mm-f3.5_v1a
Accura 75/3.5 [V1]
Enlarger lens marked Anastigmat. Black body; silver nose and mount.
accura-75-3.5-v1f
Accura 75/3.5 [V2]
Japanese enlarger lens marked Anastigmat listed in 1976 Popular Photography catalogue as supplied by RH-Div Interphoto USA. Black body; silver mount.
accura-75-3.5-v2c
Accura 75/3.5 [V3]
Enlarger lens marked Anastigmat listed in 1976 Popular Photography catalogue as supplied by RH-Div Interphoto USA.
accura-50-dia-lite-c
Accura Dia-Lite 50/3.5
Enlarger lens listed in 1976 Popular Photography catalogue supplied by RH-Div Interphoto USA, previously (1960?) Photographic Importing & Distribution Corp.
accura-dialite-75mm-v1c
Accura Dia-Lite 75/3.5 [V1]
Japanese zebra enlarger lens marketed by RH-Div Interphoto USA.
accura-dialite-75-a
Accura Dia-Lite 75/3.5 [V2]
Japanese zebra enlarger lens marketed by RH-Div Interphoto USA. [V2] has smooth, not knurled, zebra rings. Aperture presumed identical to [V1], but not confirmed.
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Accura Preset 75/3.5
Enlarger lens listed in 1976 Popular Photography catalogue supplied by RH-Div Interphoto USA.
aetna-75-a
Aetna 75/3.5
Appears to be an early version of the Japanese-made Coligar with f22 minimum aperture: AKA Perfex, Prinz, Soligor enlarger lenses.
aetna-actinar-105-a
Aetna Actinar 105/4.5
Japanese-made enlarger lens distributed by Aetna Optix (later BKA).
aetna-actinar-135-a
Aetna Actinar 135/4.5
German-made all-silver lens marked with red Double-H, distributed by Aetna Optix (later BKA) for Exakta bellows mount. Also fitted to Mirrorscope. Perhaps made by Steinheil.
aetna-actinar-75-a
Aetna Actinar 75/3.5
Japanese-made zebra lens distributed by Aetna Optix (later BKA) originally as a wide angle for the Optika IIa (Rittreck) 6×9 SLR camera. See also Macro Actinar.
aetna coligar 105mm f4
Aetna Coligar 105/4.5
Japanese-made enlarger lens sometimes marked Aetna Optix. AKA Perfex, Prinz, Soligor, Ampex, etc.
aetna-coligar-25-a
Aetna Coligar 25/3.5
Japanese-made enlarger lens sometimes marked Aetna Optix. AKA Perfex, Prinz, Soligor, Ampex, etc. Sub-30mm image circle.
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Aetna Coligar 35/3.5
Japanese-made enlarger lens sometimes marked Aetna Optix. AKA Perfex, Prinz, Soligor, Ampex, etc. 30mm image circle.
aetna-coligar-50-v1-d
Aetna Coligar 50/3.5 [V1]
Japanese-made enlarger lens sometimes marked Aetna Optix. Black body with red-dot aperture mark; silver nose and mount. AKA Perfex, Prinz, Soligor, Ampex, etc.
aetna_coligar
Aetna Coligar 50/3.5 [V2]
Japanese-made enlarger lens sometimes marked Aetna Optix. AKA Perfex, Prinz, Soligor, Ampex, etc.
aetna-coligar-75mm_f3.5-a
Aetna Coligar 75/3.5
Japanese-made enlarger lens sometimes marked Aetna Optix. AKA Perfex, Prinz, Soligor, Ampex, etc.
aetna-coligar-90-b
Aetna Coligar 90/4.5
Japanese-made enlarger lens sometimes marked Aetna Optix. Silver mount and nose; black body and fascia. AKA Perfex, Prinz, Soligor, Ampex, etc.
Macro-Actinar-placefiller
Aetna Macro Actinar 25/3.5
Japanese-made lens for Optika IIa (Rittenreck) 6×9 SLR camera. Also used as bellows and enlarger lens – probably AKA Aetna Coligar.
Macro-Actinar-placefiller
Aetna Macro Actinar 50/3.5
Japanese-made zebra lens for Optika IIa (Rittenreck) 6×9 SLR camera. Also used as bellows and enlarger lens – probably AKA Aetna Coligar.
Macro-Actinar-placefiller
Aetna Macro Actinar 75/4.5
Japanese-made zebra lens for Optika IIa (Rittenreck) 6×9 SLR camera. Also used as bellows and enlarger lens – probably AKA Aetna Coligar.
macro-actinar-90-a
Aetna Macro Actinar 90/4.5
Japanese-made lens for Optika IIa (Rittenreck) 6×9 SLR camera. Also used as bellows and enlarger lens – probably AKA Aetna Coligar.
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AG Optical Trionar 152/3.5
Slide projector lens marked TDC Vivid 6” Anastigmat. Chrome/brass body.
agfa-105672-a
Agfa 105,672/4.5
Agfa ‘M-Series’ lens of unknown application, likely intended for operation under red light (hence the ‘,672’ [nm] designation). Fascia marked ‘n.M.2510F’ which may be serial or model designation.
Agfa_77-9mm_F4-5_001
Agfa 77.9/4.5
Solagon-like industrial/enlarger lens fitted to UniRax II enlarger. Packaging marked ‘For Personal Use’. Probably optimised for UV.
Agfa_MSC_varifocal_lenses
Agfa 8506 / 121
Fixed aperture varifocal lens fitted to MSC Series minilabs, optimised for 1.7-2.4x magnification.
agfa-8506-122-1607a
Agfa 8506 / 122
Fixed aperture varifocal lens fitted to MSC Series minilabs, optimised for 2.3-3.1x magnification.
agfa-8506-123a2
Agfa 8506 / 123
Fixed aperture varifocal lens fitted to MSC MiniLabs and optimised for 1.7-2.4x magnification.
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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.