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Re: [photo-3d] Re: flash guide numbers

  • From: Bob Wier <wier@xxxxxxxxxxxxxxxxx>
  • Subject: Re: [photo-3d] Re: flash guide numbers
  • Date: Sat, 8 Apr 2000 14:08:31 -0600
>The expression "GN 50 ASA 25 DIN 15 in feet" doesn't quite make sense as 
>quoted.  Although ASA 25=DIN 15, flash manufacturers usually express guide 
>numbers for DIN ratings in meters.  (Example: the current Metz units use 
>their metric guide numbers as model nomenclature.  The 60 series unit have a 
>guide number of 60 (meters) @ DIN 21, but this is usually expressed in 
>English measure as 198 (feet) @ ASA 100, power enough to stun small animals.)
>
>
>Mike Canter
>
>

Mike (and everyone else) - the piece of the manual I have also
has listed:

"30 ASA 100 DIN 21 in meter"

definitely not power enough to stun small animals :-)

              Bob Wier
     mailto:wier@xxxxxxxxxxxxxxxxx
   2:08 PM Saturday, April 8, 2000
        Unix/Internet Administrator
   Rocky Mountain College, Billings MT.
 keeper of the Photo-3d and Overland-Trails
mailing lists and the USA GPS Waypoint server



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