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Message |
    
Hank
Tinkerer
Username: Hank
Post Number: 23
Registered: 07-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 25, 2011 - 08:41 am: | 
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Hello Friends,
I have been aggressively seeking a good shutter tester. I need one that can measure curtain travel times. I am trying to find a good "used" unit because new ones from Japan cost over $8000. I have done extensive searches on Ebay, Google & Yahoo for a decent used shutter tester. The couple that are on Ebay right now are old and overpriced, I don't mind that they are older units but the price should be more in-line. I could really use some help, does anyone know of a good unit that's for sale? Like I said I am aggressively seeking this unit so please don't be offended if you see this post elsewhere. Kind Regards, Henry |
Jeffk
Tinkerer
Username: Jeffk
Post Number: 17
Registered: 10-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 25, 2011 - 09:27 am: |
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I'm not sure where you can buy one, but for $8000 I'll build you one using a photodiode, some electronics, an oscilloscope, and some cables! In fact I could probably build you one for $80! Do you need to do more than measure how long the shutter is open, and maybe how quickly it opens and closes? |
Waynemel
Tinkerer
Username: Waynemel
Post Number: 111
Registered: 08-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 25, 2011 - 09:47 am: |
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Could you build one with 2 photodiodes, one at the left side of the frame and other at the right side? Could you measure the distance between spikes to get the time of curtain opening? |
T6nn
Tinkerer
Username: T6nn
Post Number: 24
Registered: 06-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 25, 2011 - 06:03 pm: |
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Another vote for DIY:
Your computer's sound card with a freeware sound editor works almost as well as TWO oscilloscopes. Two sensors in the film gate will give you opening and closing times at two chosen spots. They'll be marked as two nooks on a graph in each of two audio channels, plotted against the timescale. By that information, the speeds should be easy to calculate.
My next project will include a led light, fed with a high pitched audio signal as a light source. That will make the graphs easier to read: sound on a graph will correspond to the illumination, silence to the darkness... |
Kerne
Tinkerer
Username: Kerne
Post Number: 16
Registered: 01-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 25, 2011 - 09:59 pm: |
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Vasile Florin (Romania) manufactures several models. I have the cheapest one and it works great.
http://www.ebay.com/sch/vfmoto/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p3686
-- Dave |
Papco_instruments
Tinkerer
Username: Papco_instruments
Post Number: 8
Registered: 10-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 26, 2011 - 05:17 pm: |
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Hank, Check out this link www.papcoinstruments.com this digital tester is a stand alone device, no computers needed. It is battery operated, making it very useful when visiting a camera seller. Characterizing your camera shutters will help you avoid wasting film and processing. |
Pablomartinez
Tinkerer
Username: Pablomartinez
Post Number: 93
Registered: 09-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, November 24, 2011 - 09:18 am: |
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Try this: http://www.rusted.free.fr/speed%20tester.html |
