Slave Flash with 10D

Pretender · 12th December 2005

I had a Vivtar flash laying around so I thout I'd use it as a slave flash hoping to get rid of shadows. I got a divice that triggers the flash by the light of the built in flash (still havn't bought a seperate flash unit). I tried it out on manual setting as well as program setting. What is happenning is - when I take pictures with the slave, the pictures come out under exposed as to the ones I take without the slave. There must be something I don't know and am doing wrong. Any help on this would be much appreciated. Thanks.

slaam · 13th December 2005

sth that I am trying to work ard as well. have two suntax flashs one canon one nikon mount.
see my thread http://forums.clubsnap.org/showthread.php?t=166116

anyway to answer you. I suspect its cos the 10D has a preflash which the camera uses to measure the exposure. this preflash will trigger ur slave flash too early.
so what happens is the camera thinks there's enough light at first then when it actually fires the 'real' flash. your pic is underexposed.

Pretender · 16th December 2005

Thanks for the info. Got a lot to learn. Guess I spent the money for nothing and also the flash has no future. If you figure out a work around though, please let me know. Thanks again.

slaam · 16th December 2005

oh actually I dunno if 10D has the function but you can search to see if you can disable the preflash in the preferences of your camera
higher end ones shld have.

this way you can use ur IR trigger hotshoe

tell me if it works? cos I also thinking of buying the IR hotshoe..

12th December 2005	#1
Pretender New Member Join Date: Dec 2005 Posts: 8	Slave Flash with 10D I had a Vivtar flash laying around so I thout I'd use it as a slave flash hoping to get rid of shadows. I got a divice that triggers the flash by the light of the built in flash (still havn't bought a seperate flash unit). I tried it out on manual setting as well as program setting. What is happenning is - when I take pictures with the slave, the pictures come out under exposed as to the ones I take without the slave. There must be something I don't know and am doing wrong. Any help on this would be much appreciated. Thanks.

13th December 2005	#2
slaam Member Join Date: Aug 2004 Location: West Posts: 1,502	Re: Slave Flash with 10D sth that I am trying to work ard as well. have two suntax flashs one canon one nikon mount. see my thread http://forums.clubsnap.org/showthread.php?t=166116 anyway to answer you. I suspect its cos the 10D has a preflash which the camera uses to measure the exposure. this preflash will trigger ur slave flash too early. so what happens is the camera thinks there's enough light at first then when it actually fires the 'real' flash. your pic is underexposed. __________________ my photo project http://naturespies.blogspot.com http://www.dreamstime.com/kevinlam_info Last edited by slaam; 13th December 2005 at 12:09 AM.

16th December 2005	#3
Pretender New Member Join Date: Dec 2005 Posts: 8	Re: Slave Flash with 10D Thanks for the info. Got a lot to learn. Guess I spent the money for nothing and also the flash has no future. If you figure out a work around though, please let me know. Thanks again.

16th December 2005	#4
slaam Member Join Date: Aug 2004 Location: West Posts: 1,502	Re: Slave Flash with 10D oh actually I dunno if 10D has the function but you can search to see if you can disable the preflash in the preferences of your camera higher end ones shld have. this way you can use ur IR trigger hotshoe tell me if it works? cos I also thinking of buying the IR hotshoe.. __________________ my photo project http://naturespies.blogspot.com http://www.dreamstime.com/kevinlam_info