flash synch testing shutter???

[DrTang]

I were referencing the post regarding 'semi circle' vs 'full circle' - yes..I'll be able to see the flash coming thru..but if there is a difference between part open and fully open..the big blast of light coming thru the back of the lens might obscure that

You're joking, right? Point your flash at your face. Pop it. I bet a lot of "blind" people could see that.

[Bob Salomon]

Not if you point the flash at a wall and point the camera towards the same wall. All you will see is a circle of light or a partial circle of light. If necessary sunglasses can be optional. But in over 55 years of doing this I have never found that they are necessary.

[DrTang]

Not if you point the flash at a wall and point the camera towards the same wall. All you will see is a circle of light or a partial circle of light. If necessary sunglasses can be optional. But in over 55 years of doing this I have never found that they are necessary.

SWEET

I'm on it tonight


thanks so much

[Leigh]

if I fire the flash towards the lens with the device/shutter and simply look thru the back of the lens..if I see light - then it's synched..right?

That's not exactly true.

The only way to really check flash sync is with an oscilloscope and photodetector.

The problem is one of speed and intensity.

The strobe is quite bright. If it fires too early, before the shutter is fully open, you'll still see the flash when looking through the lens, but its intensity will be low, as though you used too small an aperture.

- Leigh

[Two23]

I have some lenses in Compound shutter. Where can I get one of these release cords? What are some brand names, exactly what is it called?


Kent in SD

[John Koehrer]

If the sync is off and you're looking through the lens, the flash is right if you see the full circle. If it's close you will see an area obscured by the edges of the shutter blades. IE: A number of pointed shadows.

[DrTang]

One is a Kalart Automatic Symchronizer - it is a shutter release cable with a deal at the top with a flash PC socket - I have one that is adjustable I think..with a screw on the back, and another that is adjustable via the length of the plunger deal on the camera side


also..I have a russian device that screws into the cable release socket and a cable release screws into it..it has a pc socket on it too


I got mine from ebay...was just browsing around and found them

the first one I mentioned..I just tested and it seems to work... I'll have to shoot some film to really find out though

I have some lenses in Compound shutter. Where can I get one of these release cords? What are some brand names, exactly what is it called?


Kent in SD

[SergeiR]

One is a Kalart Automatic Symchronizer - it is a shutter release cable with a deal at the top with a flash PC socket - I have one that is adjustable I think..with a screw on the back, and another that is adjustable via the length of the plunger deal on the camera side


also..I have a russian device that screws into the cable release socket and a cable release screws into it..it has a pc socket on it too


I got mine from ebay...was just browsing around and found them

the first one I mentioned..I just tested and it seems to work... I'll have to shoot some film to really find out though

If its not too much trouble - can you post picture or two?

[DrTang]

here's the Russian do-dad



here's the other one for sale right now:

http://www.ebay.com/itm/Vintage-KALA...#ht_500wt_1057

[Barry Kirsten]

A somewhat related question... Older lenses like the Optars have a so-called bi-post flash connector, two terminal posts that the sync cord connects to. Is it possible to obtain a compatible connector plug? or what do people do to get flash synch? Thanks,

Barry.