Thanks Moose,
I think I learned something, as I have many times from your posts. I'm not
saying I fully understand it, but I do believe that you do.
What would I know anyways, as I was always satisfied with the coverage of
the T20 with the 28mm lens before I got a T32? :-)
I still invite anyone who lives in a typical bungalow to go into their
living room and compare the actual coverage of a 24mm lens to a 28mm as to
the extra included in the edges. Use your OM that gives the fullest
viewfinder image so you get the best idea. I think you'll find that it won't
really matter whether those extra few inches of side walls are lit to the
exact 1/2 stop or not. It's not really what photography is all about. Just
my opinion. But it's still a more interesting discussion to me than cars and
engines :-)
Wayne (Who actually used his T32 today in the hotshoe of his C5050, taking
pics of his son's basketball games at the school gym. Coverage was just
fine.)
> OK folks,
>
> You are busily comparing apples to donuts. Attributing the reported
> experience that the T32 covers the view of a 24mm lens to things like 24
> mm not being much wider than 28 mm and general bouncing around of light
> indoors, and whatever other excuses one can make for poor Oly is silly.
> Put your brains in thinking mode, assume the engineers at Oly were at
> least semi competent and the marketing guys were just like all marketing
> guys.
>
> Do a little quick trig. The Angle of Views for lenses quoted in the eSIF
> are for the diagonal of the film frame, 43.3mm, not the long axis of 36mm.
>
> For a 24mm lens, with spec. angle of view of 84 degrees, @ infinity:
>
> Film Dimensions
> --------------------
> Short Long Diag.
> Frame 24 36 43.3
> 1/2 Fr. 12 18 21.6
> Tangent .50 .75 .90
> 1/2 Angle 26.6 36.9 42.0
> AoV 53 74 84
>
> In the upper portion of the eSIF, it states, " The coverage angle is
> almost equal to the picture angle of a 24mm super wide angle lens."
>
> In the Specifications portion of the eSIF, it states. "Coverage angle:
> 53° vertical, 74° horizontal (covers picture area of 24mm lens)."
>
> In the Main Specifications portion of the T32 Instruction Manual, it
> states, "Coverage angle: 53° vertical, 74° horizontal"
>
> Hmmm, like Horton, they said what they meant and meant what they said.
>
> Now, the question of how much fall-off they allow in measuring coverage
> is still open, and we can continue to argrue, opinionate, prognosticate
> and maybe even test, that characteristic. Somebody got a blank white
> wall, T32, 24mm lens and some time on their hands? I think PS could
> stand in for the densitometer.
>
> Moose
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