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[OM] Re: Why is there no 60mm lens ? Was: 7519772104 reasonable 40f2

Subject: [OM] Re: Why is there no 60mm lens ? Was: 7519772104 reasonable 40f2
From: AG Schnozz <agschnozz@xxxxxxxxx>
Date: Fri, 3 Jun 2005 07:50:04 -0700 (PDT)
> Then the sequence resumes 
> again (roughly) with 135 (140) and 200.  Then it should go to
> 280 and 400 but 300 is much more common than 280.

And to add further confusion to this, the 135mm focal length is
actually the halfway point between 100mm and 200mm.  But is 300
halfway between 200 and 400 or is it 270?  Is 75 halfway between
50 and 100 or is it 65?

Now with the 4/3 format it gets even more confusing about focal
lengths as you need to determine whether or not you're going to
compare short-side or diagonal dimensions.

AG

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