On Mon, 5 Aug 2002 16:47:17 +0100, "Joseph Kewfi" wrote:

>> Depends on your lenses. Which lenses (focal length,
>> filter thread diameter, minimum focusing distances)
>> are you planning to use the close-up lenses with?

>I was thinking of using them with my Nikon 50mm 1.8D lens which is 52mm
>filter size.
>I don't have a specific use for them, I thought I might experiment with
>close up filters and not spend too much cash on them as I've never used them
>before and don't know what to expect , I can't tell how much use they might
>get.

The results can be sharp (stopped down at least some,
but the lens-system front-to-focused-subject distance
can be VERY small, making it awkward to shoot without
casting an inappropriate shadow (close-up lenses work
by shortening the FL of the lens [without shortening
the barrel length], effectively making the combination
into a shorter FL lens on tubes...).