Re: Maximum Extension Tube Length

[Bill D. Casselberry]

"Robert P. VanNatta" wrote:
 
> a full set of extension tubes on a 50 mm macro lens
> will take  you to around 2:1 maginfication 
> -- and require a 9 f stop compensation

        that 9 is an exposure factor, not stops. 
        try 3 & a tad actual f-stops.
        so says the wheel in my copy of the Kodak ProPhotoGuide

        same principle as filter factors


        Bill

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        Bill D. Casselberry ; Photography on the Oregon Coast

                                http://www.orednet.org/~bcasselb
                                [EMAIL PROTECTED]
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