Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site alice.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!allegra!alice!ark
From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: net.rec.photo
Subject: Re: Used equip., nikon screen, nicads, guide no
Message-ID: <3520@alice.UUCP>
Date: Tue, 2-Apr-85 15:26:40 EST
Article-I.D.: alice.3520
Posted: Tue Apr  2 15:26:40 1985
Date-Received: Wed, 3-Apr-85 02:32:21 EST
References: <2720014@acf4.UUCP>
Organization: Bell Labs, Murray Hill
Lines: 11

> 4. I own a Nikon SB-16, rated at a guide number of 148.  When I took a flash
> reading at ten feet with a Sekonic Digi-Pro, I got f/8, implying a guide 
> number of 80.  What gives?  Is the unit bogus-rated?  Or does Nikon consider
> a 1.5 stop decrease in exposure OK?  (Otherwise, I like the SB-16 a lot)

Is the SB-16 an automatic unit?  If so, it is presumably varying
its light output based on the distance from the subject.  Set it
to manual, and try the reading again.  Also, what film speed is
supposed to give you a guide number of 148?  What speed was your
meter set to?  Could it be that the unit is rated as GN 100 for
ISO 100 film, and you had your meter set to 25?