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Re: [OM] Re: Stacking converters

Subject: Re: [OM] Re: Stacking converters
From: Omer Nezih GEREK <gerek@xxxxxxxxxxxxxxx>
Date: Mon, 11 Jan 1999 16:44:03 +0100 (MET)
On Mon, 11 Jan 1999 MorrisMini@xxxxxxx wrote:

> How is the focal length calculated?  Do you add the converters and then
> multiply times the lens length, or multiply one converter times the lens
> length and that times the other converter?  For a 300mm, for example, is it:
> 
> 300mm X 1.4 = 420mm
> 420mm X 2 + 840mm
> 
> -or-
> 
> 300mm X (1.4 + 2)= 1020mm?????

I wonder how you came up with the idea of "adding" the facors of 
"multipliers".

They are multipliers, so you multiply all the time. (Himm.. Since 2+2 = 
2*2, it might have caused some misconception).

Wishing you a VERY ROBUST tripod for that,

OMer

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