shawn
Veteran
I was curious to see how my accurate my S2A shutter is so I hooked it up to a Phochron XA tester
I shot 4 tests at each speed and the tester gives an average speed as well as the min/max for each speed.
1 second = average of 1/1.05 (min 1.03, max 1.08)
1/2 second = average of 1/2.08 (min 1/2.02, max 1/2.13)
1/4 second = average 1/4.01 (min 1/3.93, max 1/4.26)
1/8 second = average of 1/11.1 (min 1/11.0, max 1/11.1)
1/15 second = average of 1/16.8 (min 1/16.6, max 1/16.9)
1/30 second = average of 1/28.5 (min 1/28.4, max 1/28.6)
1/60 second = average of 1/66.5 (min 1/66.3, max 1/66.8)
1/125 second = average of 1/133 (min 1/132, max 1/135)
1/250 second = average of 1/259 (min 1/256, max 1/261)
1/500 second = average of 1/448 (min 1/441, max 1/452)
1/1000 second = average of 1/719 (min 1/689, max 1/782) Min 1.278mx max 1.450ms
The 1/1000 is about half a stop slow but For a 50+ year old mechanical shutter I am very impressed with the accuracy and especially the consistency of these.
I shot 4 tests at each speed and the tester gives an average speed as well as the min/max for each speed.
1 second = average of 1/1.05 (min 1.03, max 1.08)
1/2 second = average of 1/2.08 (min 1/2.02, max 1/2.13)
1/4 second = average 1/4.01 (min 1/3.93, max 1/4.26)
1/8 second = average of 1/11.1 (min 1/11.0, max 1/11.1)
1/15 second = average of 1/16.8 (min 1/16.6, max 1/16.9)
1/30 second = average of 1/28.5 (min 1/28.4, max 1/28.6)
1/60 second = average of 1/66.5 (min 1/66.3, max 1/66.8)
1/125 second = average of 1/133 (min 1/132, max 1/135)
1/250 second = average of 1/259 (min 1/256, max 1/261)
1/500 second = average of 1/448 (min 1/441, max 1/452)
1/1000 second = average of 1/719 (min 1/689, max 1/782) Min 1.278mx max 1.450ms
The 1/1000 is about half a stop slow but For a 50+ year old mechanical shutter I am very impressed with the accuracy and especially the consistency of these.
Retro-Grouch
Veteran
I've never tested the shutters on my Bronicas with a tester, but I shoot transparency film at all speeds and the exposures are always spot on. That's all I need to know; the leaf shutters on my Hassy lenses have all needed a CLA over time. Hmm...
The Bronicas, for all their internal complexity, seem to have been a brilliant feat of engineering, designed for durability over the long haul. Sooner or later, the word will get out. Stock up now, and beat the rush!
The Bronicas, for all their internal complexity, seem to have been a brilliant feat of engineering, designed for durability over the long haul. Sooner or later, the word will get out. Stock up now, and beat the rush!