P25+ doesnt match my lightmeter...

[Valentin]

My Sekonic 358 is spot on with flash but it's a little off with ambient. The difference is not that big to worry about it. Since the only time I would use a lightmeter is when using flash, that's what I'm worry about

 

[Leigh]

What about aperture?

My Sekonic 358 is spot on with flash but it's a little off with ambient.

The preceding comment that the exposures are accurate with flash but off with ambient light indicates a shutter speed problem.

Flash exposures are only sensitive to aperture, since the shutter is normally open for much longer than the flash duration.

The OP's problem may well be aperture-related. A flash test would be the best way to tell.

- Leigh

 

[SergeiR]

In the studio my RZ w/ ZD back matches up to my 758DR. My 1DsIII and 1DIII are both off by 2 stops from the meter. The 758 supports having two different configurations for camera oddness. But I think I'm just going to use the RZ in the studio and leave the 1Ds in it's bag.

--Mark
http://gallery.virtuousphotography.com/

Actually 3, not 2. I have zd , leaf 54s and d700 calibrated, b.c they all are a bit off one way or another, from flash meter factory. But not by 2 stops. More like 1/3-2/3 of stop.