Boz,
>
> Unknown maximum magnification:
>
For the not FREE or IF types this can be calculated from the shortest focus
distance.
>
> FA* 500/4,5:
> cap type (clip-on, slip-on), internal cap diameter,
> cap material (rubber, plastic, metal)
A new 500mm lens ?
>
> 1000/8:
> cap type (clip-on, slip-on), internal cap diameter,
> cap material (rubber, plastic, metal)
>
Metal slip on cap.
George
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