Hi, Skip and all.
>>From an Ebay item (2961046267), it looks like Sigma made a line of lenses
>>similar to the Tamron Adaptall. Does anyone know the extent of that
>>line?
I don't think so. That eBay item is just a Sigma 16mm F2.8 fish-eye in
Min*lta-AF mount. The two-piece setup shown is *not* an interchangeable
mount system, but the already posted 'Filtermatic' system, just like the
Sigma 8mm F4 fisheye. BTW, filters are compatible between both lenses. A
clear filter is needed to achieve correct infinity focus.
>Did they make an Olympus OM mount for them?
Yes. I own both Sigma fisheyes in OM mount.
>Was it just a T-mount?
No, as said above.
>Was this a stop-down lens?
No. It does couple with the automatic diaphragm and open-aperture metering
system of the camera -- at least so it does with the OMs.
Best regards,
...
Carlos J. Santisteban
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