10D pre-flash for exposure..... -- Canon Digital Cameras in photography-on-the.net forums

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Nov 14, 2004 09:45 | #1

Is there any way of disabling this feature?

The reason I'm asking is because I have been given three Vivitar strobes that I now have mounted on their own tripod with a photocell slave sensor.

The problem is that they fire with the pre-flash, which in turn underexposes the picture. (the strobes fire before the pciture is taken). However, if I mount one of the flashes on the body, then everything works fine.

Thanks in advance! :wink:

Canon 10D w/ BG-ED3 Grip
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evilenglishman

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Nov 14, 2004 09:59 | #2

no you can't stop the pre-flash

Click here to view and/or sign the petition

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chops
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Nov 14, 2004 10:30 | #3

Yeah, I figured as much. I just thought I would ask. I thought maybe someone would have some neat little trick or something to get around it.

One more question... When you have either the 220, 420, oe 550EX flashes mounted, do they also fire a pre-flash?

Canon 10D w/ BG-ED3 Grip
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Canon EF 28-105 F3.5-4.5 Mk II
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Jon

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Nov 14, 2004 10:43 | #4

You can set the 550 to full manual where it won't. The others are always in E-TTL mode, which uses the pre-flash in exposure determination.

Jon
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PacAce

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Nov 14, 2004 10:43 | #5

chops wrote:
Yeah, I figured as much. I just thought I would ask. I thought maybe someone would have some neat little trick or something to get around it.

One more question... When you have either the 220, 420, oe 550EX flashes mounted, do they also fire a pre-flash?

Yes but you can set the 550EX to manual. Then it won't fire the pre-flash.

...Leo

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PacAce

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Nov 14, 2004 10:45 | #6

Hey, Joh, you hit the Enter key a hair before I did. :lol:

...Leo

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Jon

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Nov 14, 2004 10:47 | #7

Nice sunny day like this, what are we doing inside???

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PacAce

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Nov 14, 2004 10:58 | #8

Me, I was playing with my 10D and 550EX to make sure my response was accurate before hitting the Enter key (that's why you beat me by a hair :mrgreen: ). I'd sure hate to embarrass myself in front of all these people with the wrong response about the pre-flash.

But you have a good point. What ARE we doing inside on a nice sunny day like today?

...Leo

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Headcase650

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Nov 14, 2004 11:35 | #9

Do you suffer from "Pre-E-Flash-Ulation"

60D, Canon 18-135 IS, Sigma 10-20 hsm, 24-70 2.8 hsm, 70-200 2.8 hsm, 430EX II, and all the other stuff that goes along with it.

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wolf

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Nov 14, 2004 11:44 | #10

What you could do is buy a real cheap TTL flash to put on your 10D to fire the Vivitars.

<> My Gear <>

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chops
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Nov 14, 2004 11:50 | #11

Thanks again guys!

After doing some playing around with these flashes, I'm starting to get some pretty decent results. Here's a few shots. (obviously, everything was shot in manual). :wink:

Oh yeah, BTW, the weather is crappy here today, so I'll just have to play inside. :cry:

This first one shows two of the three strobes, slaves and tripods.

Byte size: ZERO | Content warning: NOT AN IMAGE

Canon 10D w/ BG-ED3 Grip
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Canon EF 28-105 F3.5-4.5 Mk II
SanDisk 2GB Ultra II & Extreme III
http://charlest.zenfolio.com/

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DocFrankenstein

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Nov 14, 2004 12:54 | #12

How did you get the vivitars to fire as slaves?

National Sarcasm Society. Like we need your support.

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chops
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Nov 14, 2004 14:39 | #13

DocFrankenstein wrote:
How did you get the vivitars to fire as slaves?

I'm using some of these....

http://www.bhphotovideo.com …ails&Q=&sku=163363&is=REG

Canon 10D w/ BG-ED3 Grip
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Canon EF 28-105 F3.5-4.5 Mk II
SanDisk 2GB Ultra II & Extreme III
http://charlest.zenfolio.com/

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vfilby

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Nov 14, 2004 16:09 | #14

I have one of those, not a name brand though. Cost about $10 off epray, likely from joe's photo auctions.

Glass and plastic

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chops
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Nov 14, 2004 17:02 | #15

vfilby wrote:
I have one of those, not a name brand though. Cost about $10 off epray, likely from joe's photo auctions.

One of the perks of working at a camera store.... I got mine for around 4 bucks each. These little suckers work like a charm and can't be beat for the price.

There goes your wireless solution for Canon! LOL :lol:

Canon 10D w/ BG-ED3 Grip
Canon EF 50mm F1.8 Mk II
Canon EF 28-105 F3.5-4.5 Mk II
SanDisk 2GB Ultra II & Extreme III
http://charlest.zenfolio.com/

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