ST901

Focus

Manual

Mount

M42

Format

35mm

Battery

6V PX28 / 4LR44

Metering

TTL, 2 x silicon photodiode, at full aperture

Weight

641g

Spec Notes

Auto 20s-1/1000 stepless; manual B and 1/60-1/1000, of which five mechanical speeds keep working with a dead battery. OPEN-APERTURE metering.

Shutter Type

electronic cloth focal-plane

Exposure Modes

Aperture-priority AE, Manual

Viewfinder Type

pentaprism with LED shutter-speed digits; microprism and split-image

Introduced

1974

Flash Sync Speed

1/60

Max Shutter Speed

1/1000