Go Back   Steve's Digicams Forums > Digicam Help > Flash (External)

Reply
 
Thread Tools Search this Thread
Old Feb 26, 2003, 11:47 PM   #1
Junior Member
 
Join Date: Feb 2003
Posts: 11
Default Attach an old "Hot Shoe" Flash unit to Oly C4040Z?

Hey Gurus....

I've got a really old external hot shoe flash unit from a 35mm SLR. Is there any hope that it could be useful with my new Olympus C4040Z?

If so, how?

I'm particularly intriqued with the idea of one of those side mount bracket thingy's.... (3rd party, of course, on accounta I'm cheap - besides, the War Dept. says I've blown the toy budget).
robnjay is offline   Reply With Quote
Sponsored Links
Old Feb 27, 2003, 12:39 AM   #2
Senior Member
 
KCan's Avatar
 
Join Date: Jul 2002
Posts: 1,625
Default

http://cf.olympus-europa.com/consume...FlashChart.pdf

It’s likely that you need the FL-CB03 cord plus a pc to hotshoe adapter (for under ten box everywhere)
Caution: check you flash trigger voltage, you can fry your cam
http://www.botzilla.com/photo/strobeVolts.html


check also here for slaving / insulating devices:
http://www.weinproducts.com/safesyncs.htm
KCan is offline   Reply With Quote
Old Feb 27, 2003, 7:52 AM   #3
Senior Member
 
Join Date: Jun 2002
Posts: 104
Default

Assuming the flash has a PC jack, you will need two cords: an Olympus FLCB04 and a standard PC cord. The FLCB04 goes to the proprietary jack on the C4040, then the PC cord from the other end to the flash. You can use any cheap bracket, but if it has a metal shoe, you will need a thin piece of plastic, or tape, inside it to insulate from the flash's contacts, or it will fire intermittently. The C4040 MUST be in manual or aperture priority mode for the third party flash to fire. For best results, turn OFF the built-in flash.
Skiola is offline   Reply With Quote
Old Feb 27, 2003, 8:16 AM   #4
Junior Member
 
Join Date: Feb 2003
Posts: 11
Default

The flash unit is a Minolta Auto 32 (vintage 1975).

I don't know how to find the flash voltage. It takes 4 AA batteries...
robnjay is offline   Reply With Quote
Old Feb 27, 2003, 8:23 PM   #5
Senior Member
 
KCan's Avatar
 
Join Date: Jul 2002
Posts: 1,625
Default

Robnjay,
You can check the trigger voltage yourself using a high impedance voltmeter ( all digital ones will do). Measure the voltage at the hot shoe terminals ( the external contact and the center contact if it is a ISO shoe) , or at the pc sync cord jack.
(Measure the trigger voltage when the flash is fully charged, ready to fire)
(about 2~4 volt would be safe for the cam)

I forgot to mention above, the polarity of both ( camera and flash should match of course)

The supply voltage ( 4 AA) is not an indication of trigger voltage in any case. The battery are used to run a voltage step up circuit to charge a capacitor to several hundred volts necessary for the xenon tube ( the flash “bulb”) .
The trigger circuit may use the same voltage as the above described circuit ( cheapo old design) , or another voltage step up circuit to trigger the tube discharge. This later design has low trigger voltage ( almost “modern flash” use this “safe” design)

If you are uncomfortable with electric/electronic notions , better use a slave solution since it’s safe for your camera.
KCan is offline   Reply With Quote
Old Feb 28, 2003, 9:09 AM   #6
Senior Member
 
Join Date: Aug 2002
Posts: 2,162
Default

If your flash is a dedicated type, with manual overide (which you must use) then you might be OK as there are likely to be transistors between the shoe and the high voltage flash circuits - but do the test!
voxmagna is offline   Reply With Quote
Old Feb 28, 2003, 8:49 PM   #7
Senior Member
 
Join Date: Dec 2002
Posts: 186
Default

Check out this site.

http://www.botzilla.com/photo/strobeVolts.html

Sorry KCan I didn't notice your link right off.

Ray

D490Z,C-5050
EasyRay is offline   Reply With Quote
Old Feb 28, 2003, 9:03 PM   #8
Senior Member
 
KCan's Avatar
 
Join Date: Jul 2002
Posts: 1,625
Default

EasyRay
Myself bookmark the link from someone's posting long ago,
real great infos we found on the net , isn't it?
KCan is offline   Reply With Quote
Old Mar 1, 2003, 8:26 PM   #9
Junior Member
 
Join Date: Feb 2003
Posts: 11
Default

I measured the trigger voltage using the instructions from the website referenced above and got 192 VDC!

Guess I won't be using this flash...
robnjay is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 4:09 AM.