[argyllcms] Re: Spotread -f and flash Guide Number calculation problem,

  • From: Iliah Borg <ib@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 9 Feb 2011 17:51:29 -0500

On Feb 9, 2011, at 5:48 PM, Matthieu DUBAIL wrote:

> 54 is for max zoom (85mm with the pentax). Measurements were done at
> 50mm flash zoom setting.
> 

Interesting.  Was the flash mounted on a camera to set the zoom to 50mm? If it 
is a digital camera, does the flash automatically adjusts the zoom to the crop? 
45*1.5 = 67.5?


> Le 9 févr. 2011 à 23:10, Iliah Borg <ib@xxxxxxxxxxx> a écrit :
> 
>>> the GN number at 1/1 power should be 45 in meter
>> 
>> I thought it is 54, not 45?
>> 
>> --
>> Iliah Borg
>> ib@xxxxxxxxxxx
>> 
>> 
>> 
>> 
> 

--
Iliah Borg
ib@xxxxxxxxxxx




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