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Old Dec 27, 2004, 7:49 PM   #1
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I have a Sunpak Auto Zoom 4000 the same as the photo below. The manual for it is long since gone.

Does anyone know the GN for it? I thought that being 4000 the GN might be 40, but I don't think Sunpak numbers follow like that. Their 655 flash has a GN of 160.

I've tried it on my 20D and it seems to be much more powerful than my 380EX.

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Old Dec 28, 2004, 11:36 PM   #2
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Very nice flash , but it's not easy to find specs on the web. My guess is that would be arround 40, 45meters (120-135 feet)
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Old Jan 7, 2013, 4:22 AM   #3
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I think the max is 40

I downloaded a copy for my AZ4000 here:

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