On Tue, 20 Oct 1998 09:22:12 -0500, "Ken Norton" <image66@xxxxxxx>
wrote:
>>>Well, let's see. I've got a magazine cover photograph (full bleed) that I
>>>took using the close-up accessory lens for the IS-1 mounted on the front
>of
>>>a 100/2.8.
>>
>>Are they single or twin elements? What is it's focal length? 135mm, or +7.5
>>diopter? What filter thead size is it?
>>
>>What is the IS-3 lens diopter?
>
>
>
>Twin elements. Focal length? I-du-know.. It has a 49mm thread size and
>JUST BARELY fits on the 100/2.8 by clearing the front element by a micron or
>two. With the 100/2.8 I can get down pretty close (don't have my camera bag
>with me at the moment so I don't know exact dimensions, but sometimes use it
>along with some extension to achieve 1:1.
>
>The IS-3 lens diopter is basicly the same thing in larger thread size.
>(52?)
>
>Ken N.
The IS-3 close-up lens (f=40cm) has a filter thread mount of 55mm.
Both the IS1/2 close up lenses (f=40cm and f=13cm for 'life-size')
have a 49mm thread.
All three achromate lenses perform very well, not only on the
IS-cameras which they are meant for, but also on OM-system Zuikos.
I have a few spares of these lenses which I might sell to anyone
interested on the list. Prices range from $65 for the IS1/2 f=40cm
type to $80 for the life-size (f=13cm) one and $95 for the IS-3 type.
All are exc++ or better.
If interested contact me off-line.
Frank van Lindert.
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