Daniel Sepke wrote:
> From pictures
> of the lens itself if it is definitely in the consumer class of DZ lenses.
> It lacks the window with a focus scale so I imagine its use will be pretty
> much limited to AF or MF guesswork.
Maybe I'm missing something here, but how does a focus scale help with
accurate focus? Roughly, sure, I can tell if it's at the near or far end
of the range when things are completely blurred.
But I can't see how you'd use the focus scale for critical focus at
all. Firstly I'd have to get an accurate measurement from the nodal
point(?) of the lens to the thing I'm trying to take a shot of; heck,
the bit of that object that I wanted to be in focus, which would be
pretty fiddly if I was going for the insides of a flower, say.
Secondly, I'd have to turn the lens until the focus distance on there
matched the distance to subject, and I can't see how that could be done
accurately at all given the amount of turn from end to end on most
lenses. If someone made a lens which took multiple rotations to shift
focus, maybe, but with the usual one-turn-or-less I'm not sure how this
would work.
Presumably in the real world nobody would genuinely try to set
something in focus without ever looking through the viewfinder, but once
you _are_ looking through the viewfinder then what does a focus scale on
the lens get you?
Is this just for setting things at hyperfocal distance or something?
-- dan
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