Re: [photo-3d] Re: Flash Photography help?

["Dr. George A. Themelis" <drt-3d@xxxxxxx>]

From: "Dr. George A. Themelis" <drt-3d@xxxxxxx>

I think you do need to do a little reading...

>Part of what is confusing me is that I know there
>are two power settings but there is only one 
>recommended f stop and no recommended shutter
>speeds. 

Shutter speed only affects the amount of ambient
light, not the light from the flash.  So there are
no speed recommendations coming from the flash.

>I am also confused by the fact that the Porter's 
>catalog lists the Cullman as having a guide number 
>of 90 at ISO 100 while the box clearly states GN
>28 at ISO 100.  Did I get ripped off?  

No.  28 is in meters, 90 is in feet.

As I said, you need to read a book and understand
the fundamentals of flash operation.

George

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