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Old Oct 3, 2011, 4:24 PM   #1
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Default Old flash, new camera?

While looking through my grandpas old photography equipment, I found 2 flashes, a Canon Speedlite 188A, and a Fotomatic 700TFZA. I can get the Speedlite to work with my camera (It doesnt like to recognize it after taking a pictuer though), but the Fotomatic doesnt work. It only has 2 pins, the large middle one and the side pin. I did come with (had to look this up, as I have never owned a flash ) a PC connector. The flash charges and flashes fine (has a test button). Anyone know how to help me? Camera is an FZ100 with a hotshoe mount
Thanks all!
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Old Oct 3, 2011, 4:32 PM   #2
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Be careful, or you may end up frying the electronics in your camera, as many modern digital cameras are expecting a trigger voltage of around 5 volts, and some older flash models may have trigger voltage of closer to 300 volts.

Look at the threads list in this forum, and you'll see a "Sticky" Thread at the top (right above your thread) that discusses this issue:

Flash (External)

Here's a direct link to that thread:

Trigger Voltage Limits with Modern Digital Cameras

You'll want to measure the trigger voltage to make sure any older flash like that is safe for your camera if you don't want to "cook' some of the circuitry in your camera by using it.

The Canon is probably safe from what I can find about it's trigger voltage.

You may be able to use manual exposure and and set aperture and ISO speed to match on both camera and flash, using it as a non-dedicated flash.

But, I don't know anything about the other flash, and it may be very dangerous to use on a modern digital camera using electronic versus mechanical relays to trigger a flash.
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Old Oct 4, 2011, 6:28 PM   #3
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Yikes, I saw it hit 86 volts before it significantly slowed.
And I put it on my camera few times....
So far havent seen any damage though..
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Old Oct 5, 2011, 6:31 AM   #4
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From what I've seen mentioned by others in Forum posts, most Panasonic cameras have hotshoes rated at up to 24 volts. But, I'd probably stick to a modern flash with a trigger voltage of around 5 or 6 volts with most digital cameras, unless the manufacturer specifically states a higher trigger voltage can be used.
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Old Oct 6, 2011, 2:03 PM   #5
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How would I go by making it a slave flash cheaply? I have a few relays here, I am a geek but I built this, so it shouldnt be too hard...
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Old Oct 6, 2011, 4:04 PM   #6
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G'day pn

The issue with slave operation / activation is the syncro action

Film camera flashes just go "fire' & it's done
Your digital camera flash fires 2, sometimes 3 times for every flash photo ... 1st= metering flash, 2nd= red-eye reduction, 3rd= final exposure

For an optical slave to worwk, it needs to be 'sync-ed' to the exposure flash ... so the trigger needs to be 'trained' to fire on the 2nd or 3rd flash, not the first flash

At home I have a box full of triggers that I went thru trying to make old flashguns work - was fun but didn't get me very far. so I bought some Yongnuo-460 flashguns [for $40ea] with built-in triggers for normal & slave operation and they work like a dream

Hope this helps
Regards, Phil
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Old Feb 25, 2014, 1:08 AM   #7
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Quote:
Originally Posted by JimC View Post
Be careful, or you may end up frying the electronics in your camera, as many modern digital cameras are expecting a trigger voltage of around 5 volts, and some older flash models may have trigger voltage of closer to 300 volts.

Look at the threads list in this forum, and you'll see a "Sticky" Thread at the top (right above your thread) that discusses this issue:

Flash (External)

Here's a direct link to that thread:

Trigger Voltage Limits with Modern Digital Cameras

You'll want to measure the trigger voltage to make sure any older flash like that is safe for your camera if you don't want to "cook' some of the circuitry in your camera by using it.

The Canon is probably safe from what I can find about it's trigger voltage.

You may be able to use manual exposure and and set aperture and ISO speed to match on both camera and flash, using it as a non-dedicated flash.

But, I don't know anything about the other flash, and it may be very dangerous to use on a modern digital camera using electronic versus mechanical relays to trigger a flash.

this is what i got as an answer from yongnuo:


will old flash 160v release damage the yongnuo rf-603c ?
will Fujifilm FL MX29 damage my receiver?
up to what voltage it is safe to use?

Thanks for your email.
YONGNUO RF603 can be used with the flashes with the save voltage below 300V. If you are using a photography luminaire, please connect it with a PC sync cable.
For we don't have a Fujifilm FL MX29 to be tested with our products, we suggest you to take your camera to a physical store to test it with our products (or borrow from your friends). If the save voltage of the flashes is not sure and the test is in need,we suggest you to use a PC sync cable.

Best regards,

YONGNUO
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