Ricoh XR Rikenon 28mm F/2.8
Wide-angle prime lens • Film era • Discontinued
- Announced:
- · 1980
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · RICOH XR RIKENON 1:2.8 28mm
- Class:
- · Fast full-frame wide-angle prime lens
- System:
- · Ricoh K (1977)
Model history (2)
| ■Ricoh XR Rikenon 28mm F/2.8 | A | 7 - 7 | 0.30m | ⌀52 | 1980 ● | |
| ■Ricoh Rikenon P 28mm F/2.8 | A | 7 - 7 | 0.30m | ⌀52 | 1984 ● | |
Specification
| Optical design: | |
| 35mm full frame | |
| 28mm | |
| F/2.8 | |
| 7 elements in 7 groups | |
| Pentax K [45.5mm] | |
| 75.4° (35mm full frame) | |
| On Pentax K APS-C [1.53x] cameras: | |
35mm equivalent focal length: | 42.8mm (in terms of field of view) |
35mm equivalent speed: | F/4.3 (in terms of depth of field) |
Diagonal angle of view: | 53.6° |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 6 (six) | |
| Focusing: | |
| 0.30m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 240g | |
| ⌀63×42mm | |
| Accessories: | |
| Screw-type 52mm | |
| <No data> | |
| <No data> |
Sources of data
- Ricoh XR Rikenon lenses booklet (January 1980).
- Ricoh cameras booklet.
- Ricoh SLR systems booklet.
Manufacturer description
With its excellent depth of field, the 28mm f/2.8 wide-angle lens is ideal for architecture and vast landscapes, indoors in limited spaces, group and interior shots. For unusual close-up effects, it focuses down to 30cm. And while the 28mm f/2.8 wide-angle lens takes in a great field of view, aberrations and curvature are strictly corrected.
From the editor
The weight is indicated according to the Ricoh XR Rikenon lenses booklet (January 1980). Both the Ricoh cameras booklet (circa 1983) and the Ricoh SLR systems booklet (circa 1982) list a lighter weight for this lens: 190g.
Some websites also mention a 1977 version with a simpler optical design (6 elements in 6 groups) and the same closest focusing distance of 0.3m. We think that this lens never existed, since it was not mentioned in the review of the accessory XR RIKENON optics in the Modern Photography magazine (1978). Also, we have photos of the XR RIKENON 28/2.8 with a very low serial number 100401 - it does not differ at all from the 1980 version.
Some websites also mention a version produced from the mid-1980s and in the 1990s, which had a simpler optical formula (5 elements in 5 groups) and the closest focusing distance of 0.3m (in the 1980s) or 0.25m (in the 1990s). We don't have photos and manufacturer's data for this version, so we decided not to record it in the database.
Other wide-angle prime lenses in the Ricoh K system
| ■Pentax K mount (5) | |||||||||
| Ricoh XR Rikenon 24mm F/2.8 | A | 7 - 7 | 0.18m | ⌀52 | 1982 ● | ||||
| Ricoh XR Rikenon 28mm F/3.5 Aspheric • Pancake lens | A | 5 - 4 | 0.35m | ⌀52 | ● | ||||
| Ricoh XR Rikenon 28mm F/3.5 | A | 6 - 6 | 0.30m | ⌀52 | 1977 ● | ||||
| Ricoh XR Rikenon 35mm F/2.8 [I] | A | 6 - 6 | 0.30m | ⌀52 | 1977 ● | ||||
| Ricoh XR Rikenon 35mm F/2.8 [II] | A | 6 - 6 | 0.35m | ⌀52 | 1980 ● | ||||
Lenses with similar focal length
| ■Pentax K mount (68) | |||||||||
| Chinar 28mm F/2.8 [M.C] akaHanimex Automatic 28mm F/2.8 | A | 7 - 7 | 0.40m | ⌀52 | ● | ||||
| Chinon Auto 28mm F/2.8 Multi-Coated akaAgfa Color 28mm F/2.8 Multi-Coated | A | 7 - 7 | 0.30m | ⌀49 | 1979 ● | ||||
| Cosina 24mm F/2.8 MC Macro akaCarl Zeiss Jena II 24mm F/2.8 MC Macro akaPhoenix 24mm F/2.8 Macro | A | 7 - 7 | 0.19m | ⌀52 | ● | ||||
| Cosina 28mm F/2.8 MC Macro akaCarl Zeiss Jena II 28mm F/2.8 MC Macro akaPhoenix 28mm F/2.8 Macro akaVivitar Wide Angle 28mm F/2.8 MC | A | 5 - 5 | 0.22m | ⌀49 | ● | ||||
| Cosina Cosinon-W 28mm F/2 MC akaPetri 28mm F/2 MC | A | 8 - 7 | 0.30m | ⌀49 | 1981 ● | ||||
| Cosina Cosinon-W 24mm F/2.8 MC | A | 7 - 7 | 0.25m | ⌀49 | 1981 ● | ||||
| Cosina Cosinon-W 28mm F/2.8 MC akaBauer Neovaron 28mm F/2.8 Multicoated akaCarl Zeiss Jena 28mm F/2.8 MC akaMiranda 28mm F/2.8 MC akaVivitar Auto 28mm F/2.8 VMC | A | 6 - 6 | 0.30m | ⌀49 | 1981 ● | ||||
| Hanimex Automatic 28mm F/2.8 MC | A | 8 - 7 | 0.30m | ⌀55 | ● | ||||
| Irix 30mm F/1.4 SLR | A | 13 - 11 | 0.34m | ⌀86 | 2021 ● | ||||
| Kino Precision Kiron 24mm F/2 MC | A | 8 - 8 | 0.30m | ⌀55 | 1980 ● | ||||
| Kino Precision Kiron 28mm F/2 MC | A | 8 - 8 | 0.30m | ⌀55 | 1980 ● | ||||
| Kino Precision Kiron 28mm F/2.8 MC | A | ? - ? | 0.30m | ⌀55 | 1980 ● | ||||
| Panagor Auto Wide-Angle 28mm F/2.8 PMC | A | 7 - 6 | 0.30m | ⌀49 | ● | ||||
| Panagor Auto Wide Angle 28mm F/2.5 [PMC] Type 2 | A | 8 - 7 | 0.30m | ⌀67 | ● | ||||
| Panagor Auto Wide-Angle 28mm F/2 PMC | A | 8 - 8 | 0.30m | ⌀55 | ● | ||||
| Panagor Auto Wide-Angle 24mm F/2.5 PMC | A | ? - ? | 0.30m | ⌀55 | ● | ||||
| smc Pentax-A 28mm F/2.8 | A | 7 - 7 | 0.30m | ⌀49 | 1983 ● | ||||
| smc Pentax-A 24mm F/2.8 | A | 9 - 8 | 0.25m | ⌀52 | 1983 ● | ||||
| smc Pentax-A 28mm F/2 | A | 8 - 7 | 0.30m | ⌀49 | 1983 ● | ||||
| smc Pentax-M 28mm F/2 | A | 8 - 7 | 0.30m | ⌀49 | 1980 ● | ||||
| smc Pentax-M 28mm F/2.8 [I] | A | 7 - 7 | 0.30m | ⌀49 | 1977 ● | ||||
| smc Pentax-M 28mm F/3.5 | A | 6 - 6 | 0.30m | ⌀49 | 1977 ● | ||||
| smc Pentax 24mm F/2.8 | A | 9 - 8 | 0.25m | ⌀52 | 1977 ● | ||||
| smc Pentax 24mm F/3.5 | A | 9 - 8 | 0.25m | ⌀58 | 1975 ● | ||||
| smc Pentax 28mm F/2 | A | 9 - 8 | 0.30m | ⌀52 | 1976 ● | ||||
| smc Pentax 28mm F/3.5 | A | 8 - 7 | 0.30m | ⌀52 | 1976 ● | ||||
| smc Pentax 30mm F/2.8 | A | 7 - 7 | 0.30m | ⌀52 | 1975 ● | ||||
| smc Pentax-M 28mm F/2.8 [II] | A | 7 - 7 | 0.30m | ⌀49 | 1982 ● | ||||
| Quantaray 28mm F/2.8 MC | A | ? - ? | 0.30m | ⌀49 | ● | ||||
| Ricoh Rikenon P 28mm F/2.8 | A | 7 - 7 | 0.30m | ⌀52 | 1984 ● | ||||
| Ricoh Rikenon P 28mm F/2.8 Macro | A | 5 - 5 | 0.22m | ⌀49 | ● | ||||
| Sigma MF Super-Wide 24mm F/2.8 Multi-Coated II | A | 8 - 7 | 0.18m | ⌀52 | 1988 ● | ||||
| Sigma MF High-Speed Wide 28mm F/1.8 Aspherical II ZEN | A | 9 - 8 | 0.30m | ⌀58 | 1994 ● | ||||
| Sigma MF High-Speed Wide 28mm F/1.8 Aspherical Multi-Coated ZEN | A | 9 - 8 | 0.30m | ⌀58 | 1990 ● | ||||
| Sigma MF Mini-Wide 28mm F/2.8 Multi-Coated II akaQuantaray 28mm F/2.8 Multi-Coated | A | 6 - 6 | 0.22m | ⌀52 | 1985 ● | ||||
| Sigma MF H.L. Wide 28mm F/2.8 Multi-Coated | A | 8 - 7 | 0.22m | ⌀52 | 1984 ● | ||||
| Sigma MF Super-Wide 24mm F/2.8 Multi-Coated | A | 7 - 7 | 0.18m | ⌀52 | 1981 ● | ||||
| Sigma MF Mini-Wide 28mm F/2.8 Multi-Coated akaPentacon Prakticar PM 28mm F/2.8 MC | A | 7 - 6 | 0.22m | ⌀52 | 1978 ● | ||||
| Sigma[-XQ] MF 28mm F/2.8 Filtermatic Multi-Coated | A | 8 - 7 | 0.35m | ⌀52 | 1978 ● | ||||
| Sigma[-XQ] MF 24mm F/2.8 Filtermatic Multi-Coated | A | 10 - 8 | 0.25m | ⌀62 | 1978 ● | ||||
| Sigma-Z MF 24mm F/2.8 [Multi-Coated] | A | 10 - 8 | 0.25m | ⌀62 | 1975 ● | ||||
| Sigma-Z MF 28mm F/2.8 [Multi-Coated] | A | 7 - 6 | 0.40m | ⌀62 | 1975 ● | ||||
| Soligor C/D 28mm F/2 P (s/n 1xxxxxxx) | A | 8 - 7 | 0.23m | ⌀58 | 1974 ● | ||||
| Soligor G/S Wide-Auto 24mm F/2.5 MC (s/n 3xxxxxx) | A | 9 - 7 | 0.30m | ⌀55 | ● | ||||
| Soligor G/S Wide-Auto 28mm F/2.5 MC (s/n 3xxxxxx) | A | 8 - 8 | 0.30m | ⌀52 | ● | ||||
| Soligor C/D 28mm F/2.8 MC | A | 7 - 6 | 0.40m | ⌀58 | ● | ||||
| Soligor C/D 28mm F/2.8 (s/n 1xxxxxxx) | A | 7 - 7 | 0.30m | ⌀52 | ● | ||||
| Soligor Wide-Auto 28mm F/2.8 (s/n 1xxxxxxx) | A | 7 - 6 | 0.30m | ⌀58 | ● | ||||
| Soligor C/D Dualfocal 28+35mm F/3.5+3.8 MC | A | 9 - 9 | 0.40m | ⌀52 | 1981 ● | ||||
| Tokina SL 28mm F/2.8 | A | 5 - 5 | 0.30m | ⌀49 | ● | ||||
| Tokina SL 24mm F/2.8 [II] | A | 7 - 7 | 0.19m | ⌀52 | ● | ||||
| Tokina 24mm F/2.8 RMC akaTokina SL 24mm F/2.8 [I] | A | 8 - 8 | 0.27m | ⌀52 | ● | ||||
| Tokina 28mm F/2.8 RMC akaVoigtlander Color-Skoparet 28mm F/2.8 MC | A | 5 - 5 | 0.30m | ⌀52 | ● | ||||
| Vivitar Series 1 Auto Wide Angle 28mm F/1.9 VMC (s/n 37xxxxxx) | A | 9 - 8 | 0.30m | ⌀58 | 1976 ● | ||||
| Vivitar [Auto] Wide-Angle 24mm F/2 [MC] Compact (s/n 22xxxxxx) | A | 8 - 8 | 0.30m | ⌀55 | 1978 ● | ||||
| Vivitar [Auto] Wide-Angle 28mm F/2 [MC] Compact (s/n 22xxxxxx) | A | 8 - 8 | 0.30m | ⌀55 | 1978 ● | ||||
| Vivitar Auto Wide-Angle 28mm F/2.5 Type 2 (s/n 22xxxxxx) | A | 8 - 7 | 0.30m | ⌀67 | ● | ||||
| Vivitar Auto Wide-Angle 28mm F/2.5 Type 1 (s/n 22xxxxxx) | A | 8 - 7 | 0.30m | ⌀62 | 1969 ● | ||||
| Vivitar [Auto] Wide Angle 28mm F/2.8 [MC] Compact [I] (s/n 28xxxxxx) | A | 7 - 7 | 0.30m | ⌀49 | ● | ||||
| Vivitar Wide Angle 28mm F/2.8 MC Compact [II] (s/n 42xxxxxx) | A | 7 - 7 | 0.30m | ⌀49 | 1983 ● | ||||
| Vivitar Wide Angle 28mm F/2 MC Close Focus (s/n 28xxxxxx) | A | 8 - 7 | 0.23m | ⌀49 | 1983 ● | ||||
| Vivitar Wide Angle 28mm F/2.8 MC Close Focus (s/n 28xxxxxx) | A | 5 - 5 | 0.23m | ⌀49 | ● | ||||
| Vivitar Wide Angle 24mm F/2.8 MC (s/n 9xxxxxxx) | A | 7 - 7 | 0.19m | ⌀52 | ● | ||||
| Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxxx) | A | 8 - 7 | 0.25m | ⌀58 | 1976 ● | ||||
| Vivitar Wide Angle 24mm F/2 MC Compact (s/n 28xxxxxx) | A | 8 - 8 | 0.30m | ⌀52 | ● | ||||
| Vivitar Wide Angle 28mm F/2.8 MC (s/n 9xxxxxxx) | A | 5 - 5 | 0.23m | ⌀49 | ● | ||||
| Vivitar Wide Angle 28mm F/2.8 MC (s/n 61xxxxxx) | A | ? - ? | ⌀52 | ● | |||||
| Carl Zeiss Classic Distagon T* 25mm F/2.8 ZF / ZF.2 / ZK / ZS | A | 10 - 8 | 0.17m | E58 | 2006 ● | ||||
| ■Interchangeable mount (25) | |||||||||
| Hanimex 28mm F/2.8 [T] akaHanimex 28mm F/3 | P | 7 - ? | 0.45m | ⌀58 | ● | ||||
| Sankyo Kohki W-Komura 28mm F/3.5 [Unidapter] | P | 6 - ? | 0.40m | ⌀55 | ● | ||||
| Sankyo Kohki W-Komura 24mm F/3.5 [Unidapter Auto] | A | 7 - ? | 0.26m | ⌀52 | ● | ||||
| Sankyo Kohki W-Komura 28mm F/3.5 [Unidapter Auto] | A | 8 - ? | 0.30m | ⌀52 | ● | ||||
| Komuranon 24mm F/2.5 K·M·C | A | 11 - 8 | 0.26m | ⌀58 | 1974 ● | ||||
| Komuranon 28mm F/2.5 K·M·C | A | 9 - 7 | 0.30m | ⌀58 | 1974 ● | ||||
| Sigma[-XQ] MF [Wide] 24mm F/2.8 Filtermatic [Multi-Coated] [YS] | A | 10 - 8 | 0.20m | ⌀62 | 1972 ● | ||||
| Sigma MF Widemax 28mm F/2.8 [Multi] [YS] | A | 7 - 6 | 0.30m | ⌀62 | 1970 ● | ||||
| Soligor Wide-Auto 28mm F/2.8 (s/n 1xxxxxxx) [T-4] | A | 7 - 6 | 0.30m | ⌀58 | ● | ||||
| Soligor Wide-Auto 24mm F/2.8 (s/n 1xxxxxxx) [T-4] | A | 8 - 7 | 0.30m | ⌀67 | ● | ||||
| Soligor Wide Angle 28mm F/2.8 [T] | P | 6 - 6 | 3.5 ft. | ⌀58 | ● | ||||
| Mir-10A 28mm F/3.5 [T] akaМИР-10А 28mm F/3.5 | P | 8 - 7 | 0.20m | ⌀67 | ● | ||||
| Tamron 24mm F/2.5 MC 01B [Adaptall-2] | A | 10 - 9 | 0.25m | ⌀55 | 1979 ● | ||||
| Tamron 24mm F/2.5 01BB [Adaptall-2] | A | 10 - 9 | 0.25m | ⌀55 | 1987 ● | ||||
| Tamron 28mm F/2.5 MC 02B [Adaptall-2] | A | 7 - 7 | 0.25m | ⌀49 | 1979 ● | ||||
| Tamron 24mm F/2.5 CW-24 [Adaptall] | A | 10 - 9 | 0.25m | ⌀55 | 1976 ● | ||||
| Tamron 28mm F/2.8 CW-28 [Adaptall] | A | 7 - 7 | 0.25m | ⌀52 | 1976 ● | ||||
| Tamron Auto 24mm F/3.5 [Adapt-A-Matic] | A | 8 - 6 | 0.25m | ⌀72 | 1971 ● | ||||
| Tamron Auto 28mm F/2.8 [Adapt-A-Matic] | A | 7 - 7 | 0.22m | ⌀62 | 1969 ● | ||||
| Tamron Auto 28mm F/2.8 [Adapt-A-Matic] | A | 7 - 7 | 0.22m | ⌀58 | 1972 ● | ||||
| Vivitar Wide Angle 28mm F/2.5 [T] | P | 8 - 7 | 0.30m | ⌀62 | ● | ||||
| Vivitar Auto Wide-Angle 28mm F/2.8 (s/n 37xxxxxxx) [T-4] | A | 7 - 6 | 0.30m | ⌀58 | 1968 ● | ||||
| Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxx) [T-4] | A | 8 - 7 | 0.30m | ⌀67 | ● | ||||
| Vivitar Auto Wide-Angle 28mm F/2.5 (s/n 37xxxxxx) [TX] | A | 7 - 7 | 0.24m | ⌀52 | 1976 ● | ||||
| Vivitar Auto Wide-Angle 24mm F/2.8 (s/n 37xxxxxx) [TX] | A | 8 - 7 | 0.23m | ⌀58 | 1976 ● | ||||