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Old Oct 4, 2004, 11:54 AM   #1
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I am looking for a very specific flash feature/operation within the myriad of 4-6 MP $300 - $500 cameras. What I want to find out is which camera brands produce a single flash burst?

Recently I have used a Canon S45 and Sony W1 - the flash on these units consist of a slight but super-fast and noticeable "double" or "pre" flash in conjunction with the regular flash.

I am not talking about the red-eye feature or the multi-strobe flash. Just the normal, power-on, auto setting.
I did use a Kodak 7440 produced the type of Flash I prefer however I do not care for other aspects.

I have gone to Sears, CC & BB but most of the time the camera's aren't charged or plugged in so that's why I am asking the forum.
Any ideas?
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Old Oct 4, 2004, 2:17 PM   #2
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The feature you're looking for is (slow) rear sync.
If a camera supports this flash mode, you'll get what you're after - a single flash. However it introduces more problems than it solves (I'm guessing you're wanting this single flash feature to eliminate blinking/closed eyes).
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Old Oct 4, 2004, 3:24 PM   #3
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Onyx wrote:
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The feature you're looking for is (slow) rear sync.
If a camera supports this flash mode, you'll get what you're after - a single flash. However it introduces more problems than it solves (I'm guessing you're wanting this single flash feature to eliminate blinking/closed eyes).
Sorry, but NO!

My Olympus C-700 does have BOTH preflash and rear-sync (curtain)...when using rear curtain on my camera with a long exposure you can really see what happens...what happens is the preflash will fire after you have pressed the shutter button but before the camera starts taking the picture...then the rear curtain flash will fire just before the shutter closes. I did extensive experiments with my camera on this as I use a slave flash (the slave requires to know about the existance of the preflash).

On many cameras, you can't use SLOW unless you are in shutter priority or manual exposure.
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Old Oct 4, 2004, 6:50 PM   #4
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Onyx,
You hit the nail on the head. The cams I haved used give my subject (kid and wife) droppy, stoner eyes. You mentioned that I may run into other issues. Please elaborate and thanks for providing a lead.
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Old Oct 4, 2004, 8:49 PM   #5
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Not all Digital Cameras use a preflash. For example,I've got aKonica KD-510z ( a.k.a., Minolta G500) that does not use a preflash. It appears to use a combination of metering before the shot, focus distance, and a separate sensor to measure the light generated by the flash to determine when to end the burst (it's a tiny, separate light sensor in the front of the camera -- recessed in a small hole).

But, this is a pocket model with bad redeye. I do shoot mine with redeye reduction turned off (because I don't like changed facial expressions from a preflash either).

I've also ownedtwo Nikon Digital Camerasthat did not use a preflash (Nikon Coolpix 950, Nikon Coolpix 990). I've still got the 950. These also have a separate tiny sensor for determining when to squelch the flash output.

According to a chart I found; it appears that some Kodak, Sony, Ricoh, Fuji, Casio and HP models didn't use a preflash either. But, it's an old chart that did not break down which models did or did not use one (other than for the older Nikons -- where the 900 series did not, and the 700 and 800 series did), and I wouldn't trust the broad categorization by manufacturer anymore.

You may want to try contacting SR Inc. to see if they may have a current list of models that don't use a preflash (since they are in the business of selling slave flashes, they may know):

http://www.srelectronics.com/


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Old Oct 5, 2004, 12:27 PM   #6
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uncool wrote:
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Onyx,
You hit the nail on the head. The cams I haved used give my subject (kid and wife) droppy, stoner eyes. You mentioned that I may run into other issues. Please elaborate and thanks for providing a lead.
Uncool, I was under the impression that other camera's slow sync flash mode bypasses preflashes, as it with the model I have. Mikefellh has stated that to be incorrect - so I believe there's no need to investigate this option further.

FYI - as for the other issues, slow sync deliberately prolongs the shutter to make the bakcground bright, at the expense of blurring the entire picture due to handholding/camera shake

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