Found a stat about old camera shutter springs that changed how I order parts

I was reading a repair manual for a Pentax K1000 from 1979 and it mentioned the factory used a specific alloy for the shutter curtain tension springs. The manual said they were rated for about 100,000 cycles before fatigue. I always just replaced them when they felt weak, but knowing that number makes me check the frame counters on old bodies now. Anyone else use original factory cycle counts to guide their maintenance checks?

2 comments

2 Comments

taylorlewis4d ago

That 100,000 cycle spec is a solid benchmark. Do you find it holds true across other camera models from that era, or was Pentax unique in publishing that data? I've never seen a concrete number in a Nikon F manual.

hannah_wright4d ago

Honestly, Pentax was pretty much alone in putting a hard number out there. Most brands just said "tested for durability" or something vague. That 100,000 figure became legendary because it was the only one. I've looked through a ton of old manuals and never found a Nikon or Canon shutter rated with a specific cycle count. They just didn't do it. Pentax was making a bold claim to stand out, and it worked. We're still talking about it fifty years later.