Much obliged, John
I'll retain your mail and check the lens as soon as I
get it. If I find something suspicious, guess whom
I'll send it for repair :-)
Thomas
--- John Hermanson <omtech@xxxxxxxxx> schrieb:
> A lot of 75-150 have a separated element near the
> center of the lens. If
> your lens has it (degree of separation can vary) it
> will make the lens very
> difficult to focus. Or you will notice that you
> simply can't get a sharp
> image.
>
> You can sometimes see the separation, by holding the
> lens up to a light,
> looking through, and trying to focus into the center
> of the lens with your
> eye. If separated, you'll see something like a hair
> running through a lens
> or what a
> looks like a large bubble covering the majority of
> the diameter of the lens.
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