At 02:29 PM 7/23/01 EDT, you wrote:
>"gries" <gries@xxxxxxxxxxxxxxxxxxxxxxxxxxx> writes:
>
><< I have almost considered
> giving up the fisheye because this lens *almost* has the same coverage
> as the 16 w/o the strange wrapping on the sides of the frame. If you
> got money to spend on just one, then I think it should be the 18/3.5. >>
>
>On that subject, althought the 16mm has 180 degrees across the diagonal and
>the 18mm has 100 degrees, how do the vertical and horizontal angles of view
>compare?
>
>Gries is saying that they are quite similar.
>
>Does anyone have figures for V and H angles of view for these two?
>
The formula is 2 * arctan(f/L)
Where L is the radius of the frame.
Vertical L = 12mm
Horiz L = 18mm
Diag L = 22mm
18mm is easy for horiz: 90deg
Paul
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|