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Re: [OM] Moose Type Question

Subject: Re: [OM] Moose Type Question
From: Wayne Harridge <wayneharridge@xxxxxxxxxxxxxxx>
Date: Wed, 30 Sep 2009 14:22:57 +1000
Actually very close, 2**pi =8.82, but 3.17 stops is closer !

The exposure compensation for a 3x converter = 9.

...Wayne

> Clay Nichols <Clay.Nichols@xxxxxxxxxxxxxxxxxx> wrote:
> 
> 3X cost you Pi??
> 
> >>> Andrew Fildes <afildes@xxxxxxxxxxxxx> 09/29/09 7:48 PM >>> 
> 1.4x costs you exactly one stop, 2x cost two stops. That's my 
> understanding. Some sort of geometric, logarithmic scale thingy. I 
> suppose a 3x costs you 3.141..... stops :-) 
> Andrew Fildes 
> afildes@xxxxxxxxxxxxx 
> 
> 
> 
> On 30/09/2009, at 9:35 AM, Clay Nichols wrote: 
> 
> > Why are the Olympus teleconverters rated at 1.4x mag instead of 
> > 1.5x which is half of the 2x teleconverter? 
> 
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...Wayne

Wayne Harridge

http://lrh.structuregraphs.com
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