Shutter Timers

[Polybun]

Does anyone have plans for one to construct their own shutter speed timer?

 

[Nicholas Lindan]

For building a shutter of for testing a shutter?

 

[bobwysiwyg]

In case you are talking about testing shutter speeds, take a look at this..

Dead Link Removed

It works quite well.

 

[Greg_E]

There is some good information on the F295 site. there are several electronics kits that have timers that will operate a relay, so you would just need some form of electromechanical shutter, the solenoid is the hard/expensive part to buy.

I started to design a really nice all brass shutter that I was going to use with a timer and solenoid, but never went very far past paper and pencil.

 

[Polybun]

For building a shutter of for testing a shutter?

yes for testing a shutter. I should have been more specific.

 

[B&Jdude]

Ben:

You can check with Ed Romney's widow at www.edromney.com She sells his camera repair books at that site, one of which is a manual for building your own electronic shutter tester. Just go to that website, do about 3 page-downs to a paragraph "Need more information, more help?", and click the link to go to the book list.

EuGene Smith
KA5NLY (QRP)

 

[Poohblah]

You can also test your shutter by photographing a CRT monitor of known refresh rate and doing a small amount of math, but I believe this will only work for a small range of shutter speeds.

 

[Polybun]

You can also test your shutter by photographing a CRT monitor of known refresh rate and doing a small amount of math, but I believe this will only work for a small range of shutter speeds.

Well since you are measuring the width of the slit, It should work at just about any shutter speed. I guess actually measuring percentage of screen lighted. I've used this method to simply tell if a shutter is working properly.

 

[Greg_E]

Check out the Camera-fix group on Yahoo, there is information that coupled with an oscilliscope will let you time a shutter.

 

[craigclu]

You can also test your shutter by photographing a CRT monitor of known refresh rate and doing a small amount of math, but I believe this will only work for a small range of shutter speeds.

Here's an old document that I have that discusses this.... I don't recall any sources, etc.

 

[Polybun]

I just purchased "Electronic Projects for Photographers" from Hollywood Camera here in Portland for $2. I should have my tester built by the end of day friday

 

[Chan Tran]

The oscilloscope works very well even with old analog units. If you have good sensor, an old analog scope can measure the time with 1/10 stop accuracy. What you need when using this approach is to find a sensor that has a smalle enough detection surface and has fast enough response.