I find the point of focus with my 2-4 to be quite precise and easy to
judge. There is no region of vagueness that I have noticed. I
wonder whether eye sight is an issue here. Mine is not good so I
wear my glasses when looking through the viewfinder. I used to use a
dioptre correction lens on the viewfinder but a sizeable component of
my problem is astigmatism and dioptre correction lenses do not
correct for this. When I was using dioptre correction lenses I did
have a problem judging the correct point of focus as you describe -
using a 1-13 screen.
I know I am much better at focusing than I used to be, given the
brighter image provided by the 2-4 and the use of my glasses.
I would never dream of switching back to a 1-13.
I suppose there must be considerable individual variation involved
and it is not as simple as just saying that focusing screen x has y
characteristics which everyone will experience.
Giles
> From: "Perry Bain" <BainP@xxxxxxxxxxxxxxxxxxx>
> years. The resulting viewfinder image was beautiful and bright, but I found
> it very difficult to tell if I had achieved critical focus. With the 1-4, I
> change in the image sharpness (on the focusing screen). Maybe it is just my
> eyesight?
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