wireless 550EX in manual mode with 420EX

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danny - 07 Feb 2004 03:35 GMT

Hi,

Is it possible to set the 550EX in manual mode with a 420EX as a
slave? I've tried the setup in E-TTL mode without any problem but when
the 550EX is set to manual mode, the 420EX is not firing. Am I doing
something wrong or the 420EX is not supported when the 550EX is in
manual and I need another 550EX as slave?

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who? - 15 Feb 2004 15:35 GMT

Hello Danny,

I have the same combination and have also found that it is not possible to
use the 420EX as a wireless slave in the <M> or <MULTI> modes. The 420EX
manual states that wireless operation only works for <E-TTL> (see pages 43
and 48).

Before I would buy another 550EX ($$$), I would consider using neutral
density filters over one of the flash units and/or flash distance
adjustments to achieve a similar effect. I'm assuming that you want to use
manual mode because you want to have a flash ratio greater than 8:1 (or
1:8).

Good Luck!

Dave

> Hi,
>
[quoted text clipped - 3 lines]
> something wrong or the 420EX is not supported when the 550EX is in
> manual and I need another 550EX as slave?

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