Flash on Ebay question for A77?

Started Sep 23, 2012 | Discussions thread
Mandude
Regular MemberPosts: 378
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Re: Flash on Ebay question for A77?
In reply to IanML, Sep 23, 2012

Thank you. I read somewhere that the guide number ISO was 100.

IanML wrote:

Impossible to say, because it depends mainly on the distance between camera and subject, whether bounce or diffuser is used, and the reflectance of the subject. If it is close and bright, the flash power required will be low and the recharge interval short, and vice versa.

The guide number quoted is no help, because it does not say at what ISO.

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Ian

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