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Found a stat about old camera shutter springs that changed how I order parts | Camera Repairers - nhfree.com

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?

3 comments

3 Comments

abby1893mo ago

Real talk though, that number is basically marketing fluff dressed up as engineering. I've pulled shutters from beat to hell K1000s with frame counters over 200k and the springs were still snappy, then found "low mileage" bodies where everything was sluggish because some amateur oiled the curtain tracks. The alloy mattered less than whether some goober in 1985 decided to spray WD-40 inside. If you're actually basing part orders on a decades old cycle count instead of just feeling the tension and looking for bounce back, you're overthinking it.

taylorlewis5mo 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_wright5mo 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.