"Paul Furman" <paul-@[EMAIL PROTECTED]
> wrote:
> David J. Littleboy wrote:
>> Steven Green wrote:
>>> Anyone use a PC lens on the smaller Canon sensors?
>>
>> I have the 24TSE and a 300D, but I haven't used them together, so
FWIW...
>>
>> With FF, the Canon 24mm TSE gets a tad funky at the edges at full ****ft
>> (you don't want to use over 8mm of ****ft if there's im****tant detail at
>> the edge of the frame farthest from the center), but that wouldn't be a
>> problem on a cropped sensor, so you'd be able to use the full 11mm of
>> ****ft with no problems. And 11mm of ****ft on a 16x24mm sensor is plenty
>> of ****ft.
>>
>> You'll have to figure out for yourself if you have need of a 38.4mm
>> equivalent TSE lens, though. That's not very wide.
>
> I'm not sure 11mm of ****ft is that much at 38mm equivalent though.
I think it is. With the camera level and in landscape orientation, the
horizon moves from the center of the frame to below the bottom of the
frame.
In ****trait orientation, the horizon moves from the center of the frame to
just above the bottom of the frame. Remember, the frame is only 16 x 24
mm,
so it's the same as 1.5x the amount of ****ft in a real 38mm lens on a real
camera.
> I use an 85mm tilt/****ft micro-nikkor on a D200 and the ****ft does
almost
> nothing.
That's because it's a long tele on a cropped camera.
****fting fixes the keystone distortion you'd get by tilting the camera by
somewhat less than 1/2 the AOV of the lens.
With a long lens, the amount of keystone distortion introduced by tilting
the camera by 1/2 the verticle AOV is tiny. With a 40mm lens, it's
significant. So with a 40 mm lens, you appreciate ****ft a lot more than
you
do with a 125mm lens.
> It's intended for table-top product shooting to keep lines straight &
> control DOF. The tilt is super handy though because DOF is tight with
> closeups and it's a very sharp lens, extremely useful for my purposes.
Exactly.
> The ****ft would be more useful if it allowed more ****ft on a crop frame
> camera, it would be nice if the new Nikon t/s lenses did that but it
won't
> happen.
Stand next to a wall with some detail. Tilt so that the wall is in focus
from close at hand to infinity. Now some vertical ****ft (up and down) will
let you take three rather different images of the wall. I think.
> Anyways I'd say that if you want a wide ****ft lens, full frame is
> necessary. I've tinkered around with 28mm plunger-cam tilt ****ft on crop
> frame and it's well, 'normal', not wide.
>
>> I have a 35mm medium format lens in a ****ft adapter for the 5D, but
>> haven't actually used it.
>
> Sounds fun! That (Hartblei?) probably gets a lot of ****ft.
No, it's the Mamiya 645's 35/3.5. Here's the one test shot I took with it.
Note that it's _killer_ sharp in the center, producing nasty moiré on a
building in the background. That was handheld, so I didn't get it quite
straight. But it gives 16mm of usable ****ft on the 5D, so it is, I think,
a
functionally similar beast to the 24 TSE on a cropped camera. (Sheesh, I
should just go pull the 300D out of the closet, charge the battery, and
take
some test shots to see if I've got this right.)
http://www.pbase.com/davidjl/image/57362779/large
David J. Littleboy
Tokyo, Japan
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