Well, now you have a 6x7, so you're going to learn to think FOV instead of 
focal lengths. From this day forward, a 55mm lens is wide, and that 165 you 
bought is a short portrait lens.


> What Rob said. :)
> 
> I used sloppy terminology.  I just find it easier to think in terms of focal 
> length vs. AOV.  It's easier, for me at least, to think of a 50mm lens as a 
> 75mm lens when used on the *ist D.  Multiplying by 1.5 is not over my head.
> 
> By "rated" I meant that the image presented to the capture medium at the 
> focal plane has the same angle of view one would expect when that focal 
> length lens was used on a 35mm body as originally intended.
> 
> Tom C.
> 
> 
> 
> >From: "Rob Studdert" <[EMAIL PROTECTED]>
> >Reply-To: [email protected]
> >To: [email protected]
> >Subject: Re: Future of DA lenses
> >Date: Thu, 31 Mar 2005 17:38:31 +1000
> >
> >On 30 Mar 2005 at 23:21, Godfrey DiGiorgi wrote:
> >
> > > What is a "rated focal length"?
> > >
> > > How do you use a lens at anything other than its actual focal length?
> > > Whether projecting onto a 16x24mm format or a 24x36mm format, a lens'
> > > focal length does not change.
> >
> >I assume that Tom's comment meant to something like "the lenses design 
> >coverage
> >and suggested AOV on a 35mm frame", that sounds reasonable, not too 
> >perplexing.
> >
> >
> >
> >
> >
> >Rob Studdert
> >HURSTVILLE AUSTRALIA
> >Tel +61-2-9554-4110
> >UTC(GMT)  +10 Hours
> >[EMAIL PROTECTED]
> >http://members.ozemail.com.au/~distudio/publications/
> >Pentax user since 1986, PDMLer since 1998
> >
> 
> 

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