How do you distinguish between "longer focal length" and
"magnification". To me they go hand in hand... or didn't I understand
your point.
Dr. Florida
usher99@xxxxxxx wrote:
> Thank you Ed and Don for your comments. Longer focal length
> diminishes the effect of tilt on shifting the plane of focus. I
> have no clue if magnification has any effect on this though the total
> angular dof I suspect may diminish. Wonder if Dr. Focus is in Fla.
> It would be nice to see this effect in the VF, but if the subject is
> not properly focused, all is lost anyway. The 1-12 is weird-- largely
> clear but doesn't alter metering.
> Sometimes wish I could swap screens with a dial.
> Mike
>
>
>
>
>
>
>
>
>
> I had the 20/2 macro for a while (even more magnification than the 38),
> with
> the 1-11 and 1-12 screens. For macro, I found the 1-12 the better of
> the two,
> though as mentioned it likely wouldn't show tilt effects.
>
> 1-11 may be useful but it's challenging - since part of it is a normal
> screen,
> the outer part of it gets rather dark. The center spot (which is quite
> a bit
> smaller than the spot on the 1-12) is bright.
>
> Both 1-11 and 1-12 require a dialed-in diopter to be of any use.
> Varimagni
> would apply here, or the diopter built into the 4T. But you really need
> the
> diopter exactly dialed in - impossible to really focus it otherwise.
>
> Even tilting at max tilt the DOF is still going to be shallow, but
> better than
> w/o tilt probably.
>
> I'd probably go for the 1-12 and just max out the tilt in applications
> that
> require it, and not worry about not being able to accurately preview
> the DOF.
>
> -Ed
> --
> _________________
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