Field of view expressed in degrees. Olympus typically gives the field
of view across the diagonal of the frame which IMHO is a totally useless
number. There are various calculators available free on the web which
will give you both the horizontal and vertical angles of coverage for a
lens of given focal length and film or sensor of a given size.
If you see a specification such as 34-7deg it's telling you the field of
view is 34 degrees at the wide angle end of the zoom and 7 degrees at
the telephoto end.
Chuck Norcutt
Allen Coltrin wrote:
> What does this abbreviation mean. 34deg? I haven't seen it before.
>
> Allen
>
> ----Original Message Follows----
> From: r.burnette@xxxxxxxxxxxxx
> Reply-To: olympus@xxxxxxxxxx
> To: olympus@xxxxxxxxxx
> Subject: [OM] Re: Tamron lenses was Re: PLEASE QUIT!!!!
> Date: Thu, 01 Mar 2007 16:56:05 -0500
>
>
> I'll wager that the picture show a Tamron 70-350mm/f4.5 zoom with a 2X
> converter. Enlarged view is relatively easy to see on my LCD screen.
>
> Robert
>
> ----- Original Message -----
> From: Jeff Keller <jeffreyrkeller@xxxxxxxxx>
> Date: Thursday, March 1, 2007 16:39
> Subject: [OM] Re: Tamron lenses was Re: PLEASE QUIT!!!!
> To: olympus@xxxxxxxxxx
>
> >
> > 280083086512 shows several views of a lens in a Tamron auction labeled
> > 350/700mm Tamron f4.5 Telephoto C*non N*kon P*ntax
> >
> > which matches exactly what Allen had posted. One of the views easily
> > shows 34deg - 7deg and partially shows 0-350mm 1:4.5. It has an
> > aperture ring showing in a window AE 32 22 16 the rest presumably
> > hidden by the window. I don't know if this is what Allen saw but it
> > matches what he posted and sure looks like a zoom to me.
> > -jeff
> >
> > On 3/1/07, Moose <olymoose@xxxxxxxxx> wrote:
> > > Piers Hemy wrote:
> > > > Tamron SP lenses I can vouch for:
> > > > 90/2.5 - 17/3.5 - 60-300/3.8-5.4 - 80-200/2.8 - 35-80/3.5-
> > 3.8 -
> > > > 24-48/3.5-3.8 - 500/8
> > > >
> > > > Tamron lens I believe does not exist:
> > > > 350-700/4.5
> > > >
> > > This was either a misunderstanding on Allen's part or on the
> > part of
> > > those like us misreading his post. I seem to recall his post said
> > > "350/700/4.5"
> > >
> > > In any case, I went to the 'Bay listing and informed Allen off
> > list that
> > > what was on offer was a non SP 350/4.5 and an Adaptall2 2x
> > > teleconverter, giving the two single focal length/aperture
> > possibilities> of 350/4.5 and 700/9.
> > >
> > > I then continued with the thankless task of elucidating the
> > ins and outs
> > > of the Tamron Adaptall2 teleconverters.
> > >
> > > Never was a zoom involved, so you need not fret further.
> > >
> > > Moose
> >
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