Irix lens 21mm f/1.4 Dragonfly Pentax

Focus ring:

• rotation angle – 180°
• gear pitch – 0.8 M
• number of teeth – 117
• distance scale – Metric or imperial

Aperture ring:

• rotation angle – 75°
• gear pitch – 0.8 M
• number of teeth – 110

Viewing angle (horizontal):

• Full Frame – 79,4°
• S-35mm 1.39x – 65,6°
• APS-C 1.53x – 57°
• APS-C 1.62x – 54°
• MFT 2.0x – 43,2°

• Front filter thread: N/A
• Weather sealing: 4 rubber o-rings (PL 3 rubber o-rings)
• Front diameter: 95 mm
• Markings: laser engraved, UV reactive
• Dimensions (L x D) (without accessories): Canon EF: 101 x 95 mm
• Weight: Canon EF: 1109 g