They are useless for focusing wide angle lenses. I left one on my camera
after taking pictures of birds, then went to SF and found everything was
sharp at every focus setting with the wide angle lenses ...
-jeff
----- Original Message -----
From: "Gareth.J.Martin" <g.j.martin@xxxxxxxxxxxxx>
> Dear All,
> I've just purchased a 1-8 astrophoto screen (cheers Ian, its
> beauty!) and I'm thinking of using it all of the time instead of the
> standard split prism one which I find difficult to use. I was just
> wondering though will this impact on focusing performance at all? I
> would assume not but I thought I'd check before I go and take a few
> photos! Thanks in advance.
>
> All the best,
> Gareth.
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