I have to admit, the emphasis on this puzzles me, just something else to
go wrong as far as I can see and I can't recall ever looking at this
when taking a photo - but we are here to learn and maybe there is
something I have missed to appreciate
Ian
Dan Mitchell wrote:
> 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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