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09-14-2010, 11:27 AM   #31
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QuoteOriginally posted by stevebrot Quote
The current generation Sigma macro lenses in KA mount (50/70/105 EX DG) all have aperture rings and all are FF. This is not explicitly stated on the Sigma Web site and is difficult to determine by looking at stock photos of the lens which appear to show a non-aperture ring model regardless of mount. The only clue might be the statement regarding aperture range for the various mounts.

This is sometimes true of the Tamron as well. Photozone's review of the Tammy 90 shows the Canon mount, which does not have an aperture ring, even though the mount they are testing may have that ring.


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