Zorki 4 - Audacity shutter test

[MIkhail]

Hello,

I have just bought a 1966 Zorki 4, and since I don't have a CRT monitor at home, I have tried to test the shutter speeds using Audacity audio recorder, measuring the time between the first sound peak related to shutter opening and the first sound peak related to shutter closing (fpofpc). For faster speeds I have measured the time between the last audio peak related to opening and the first audio peak related to closing as well (lpofpc).

These are the results all in milliseconds:

Speed Indicator (Correct Speed) = fpofpc (lpofpc)

1 (1000) : 680
2 (500) : 360
4 (250) : 206
8 (125) : 134
15 (62.5) : 77
30 (31.3) : 43.8 (41.3)
60 (15.6) : 21.65 (19.15)
125 (7.8) : 6.7 (5.9)

Obviously for 250 and above this method is useless.

I know this is not an accurate method, but do you think these are acceptable results for this camera, given that I will never really use any speed below 15? Is there anything I can do to improve the accuracy of the shutter?

Thanks in advance...

---cool---

 

[tho60]

An answer from the RFF archive

An answer from the RFF archive

Thank you Richard G, fidget and Ron for your kind words.

I have a hard time framing my photos using the Zorki 4. I am through my third roll of film but I am still unsure of what I am including in the photo and what I am excluding from it, due to lack of frame guides in the viewfinder.

Can you explain to me how the borders of my final photo relate to the borders of the image I see in the viewfinder (sorry if my questions is very SLRish, but this is really my first rangefinder)?

Please check this link for detailled answer:
http://www.rangefinderforum.com/forums/archive/index.php/t-96451.html