How to Do this - DPChallenge Forums

Canon EF 24-105mm f/4.0L IS

03/05/2006 02:34:52 PM · #1

I am purchasing Kodak Z7590 that has histogram and PC socket for attaching external flash.

I will attach my external strobe.

How can i find correct exposure? I dont have a flash meter, dont want buy as i dont have money, else i would be forced to buy from ebay a second hand meter

Artifacts

Canon EOS-5D Mark II

03/05/2006 02:49:01 PM · #2

Originally posted by General:

Obviously the histogram does you no good until after you take the picture with flash, but by taking more than one image using flash you can review the histogram to determine if your exposures are correct or not.

Don't know if that helps much, but if I were you I would do a lot of experimentation before I tried taking pictures I cared about to make rough expectations for what you will get.

Message edited by author 2006-03-05 14:49:46.

Sony 16-50mm f/3.5-5.6 E-mount

03/06/2006 12:27:50 AM · #3

thanks

fotomann_forever

03/06/2006 12:33:02 AM · #4

If you know the Guide Number of the strobe, you can calculate exposure for given ISO, distance, and aperture.

As far as strobes are concerned aperture alone controls exposure - shutter speed is irrelevant.

jmsetzler

Sony Alpha a6000

03/06/2006 12:44:30 AM · #5

Originally posted by General:

You could learn what guide numbers are and use them to calculate the correct exposure. Your strobes will have guide numbers associated with them.

EDIT: oops... what fotoman said.. i didn't read down that far :)

Message edited by author 2006-03-06 00:45:02.

Nikon AF Nikkor 50mm f/1.4D

03/06/2006 01:41:07 AM · #6

Thanks alot

taterbug

Nikon D300

03/06/2006 02:15:19 AM · #7

The 7590 does have a pc socket for lighting hook-up, but if it's shows a histogram, it's hidden pretty well, I've never seen it on mine. Doesn't say anything about it in the manual. Is there something I am missing?