Discontinued
Plens
Pentax-110 18mm f/2.8
30.5mm filter · 28g
Focal length
18mm
Max Aperture
f/2.8
Weight
28g
Filter Thread
30.5mm
Min Focus Distance
25cm
Produced from 1979 · medium confidencehttps://www.pacificrimcamera.com/rl/03334/03334.pdfLaunched with the camera - the three-lens sales brochure accompanying the original body lists the 18, 24 and 50. End unconstrained.
Mount: Pentax 110 — compatible with all Pentax 110-mount bodies.
Focus
Manual
Macro
No
Mount
Pentax 110
Format
110 (13 x 17 mm)
Groups
6
Elements
6
Weight
28g
Autofocus
No
Filter Thread
30.5mm
Length mm
21
Spec Notes
NO DIAPHRAGM. Auto 110 super manual, verbatim: 'There are no aperture settings on Pentax-110 lenses. The aperture is set automatically by the diaphragm mechanism of the camera's programmed shutter system.' f/2.8 is this optic's fixed maximum and only aperture, which is why every lens in the system is f/2.8. `aperture Min` is therefore ABSENT, not zero and not a number. REJECTED: lensreview.xyz prints 最小絞り F16 for the 24mm and 50mm - inconsistent with both body programme limits (f/13.5 and f/18) and with the lens having no iris; the same site prints 最小絞り F2.8 for the zoom, which is the field being filled mechanically. NOT A MINIATURE K-MOUNT LENS - it cannot meter or expose without an Auto 110 body. ENGRAVING is 'Pentax-110', hyphenated, with no 'smc': zero instances of 'smc PENTAX-110' were found in maker print, museum catalogues, dealer transcriptions or databases. Wide-angle. Filter size from PentaxForums/KEH, not the brochure.
Diameter mm
34
Max Aperture
f/2.8
Focal Length
18
Min Focus Distance
25cm
Angle Of View
61.5 degrees
Introduced
1979
Focal Length (Max)
18mm
Focal Length (Min)
18mm