Focus
Manual
Format
35mm full frame
System
Vivitar TX (Tokina interchangeable mount)
Country
Japan
Made By
Tokina
Oem Note
camera-wiki attributes the TX family to Tokina; one secondary source (cameramanuals.org) lists Kiron for this 28/2.5 - unresolved, would need a serial OEM-code check (Tokina=37, Kiron=22).
Filter Thread
58mm
Confidence
roster HIGH (camera-wiki); optical specs (elements/groups/weight/min-focus) UNPUBLISHED = omitted
Stabilized
No
Max Aperture
f/2.5
Weather Sealed
No
Introduced
1976
Focal Length (Max)
28mm
Focal Length (Min)
28mm