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Camera Tester

Posted on 2002-07-10
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Last Modified: 2010-04-01
Ok i dont know if its me or just the way i've worded the question about the tester i want to make.

To make life easier the "timers" i want to use to display the shutter speeds and run time of the shutter are just like a stop watch you wouls use in the track and field events etc.

I want to have 5 on the screen. modern 35mm cameras have a top shutter speed of 8,000th of a second, but we only normally adjust and work on speed 1000th of a second and slower.

Can any one help with the "stop watch" or will the timer advise i was given on my last question do the job??
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Question by:MrNov
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4 Comments
 
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Expert Comment

by:mblat
ID: 7144699
I am not sure what do you want ot acomplish here.  Do you want to run you cameras amd make sure that shatter speeds is what you specified?

If so then you have several problems:
1. Communicate with camera.  
2. Set desired shutter speed.
3. Monitor if shutter is equal to what you programed.

I have no idea how you are planning to communicate with the camera and how you are planning to monitor start and the end of the shutter.  I would imagine that some additional hardware is required here.

As far as precision high resolution timing there is a good article on a subject..

http://www.naughter.com/cputicker.html

Hope it helps...
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Author Comment

by:MrNov
ID: 7146676
I repair photographic equipment, furing the serive we need to check the cameras shutter speeds, run time and exposure. The program i want to write does not have to interface with the camera just a simplish probe with 5 light sensors will sit in the film plane of the camera (where the film noramly goes) and then disply on the screen the time or the shutter as the technician i know know what they should read and will manualy be setting it on the camera as i think all i need is 5 stop watches to start and stop at different times depending on the signal set from the light sensors in the probe.

Hope this makes a bit more sence

Andy
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mblat earned 200 total points
ID: 7147284
Ok, so it should work.

You start timer from the link I posted above. It gives you start/stop capabiities. When signal from sensor come you stop it and look at result.  The only problem I see here is how do you sincronize start of the timer with start of you shutter - but I assume you hardware can give you that.  If not you also can measure timining between sensors ( again without knowing more about your hardware it is difficult to give you more details)

It doesn't seem too compilated.  If you familiar with multithreaded programming it can be very cleanly and easily accoplish via thread if not - it is still pretty easy.
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Author Comment

by:MrNov
ID: 7148645
OK thanks again, i think i shall stick with it and who know if i can get it working and accurate enough i might be able to make some money from it...lol


Andy
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