I have the bigma and ... > 1. Does SR work effectively? Yes but not as effectively as at the short end.. I estimate the effectiveness at the long end (above 300mm) to be around 1 -> 1 1/2 stops.
> 2. Is the lens type displayed correctly in the EXIF i.e. Sigma 50-500 EX? No ACR just says sigma > 3. Aprroximate aperture when zoomed at 300mm f/4, f/4.5, f/5.6? IIRC its somewhere around 5.6 > 4. Does the lens extend when zoomed? Yes > 5. Does the front element rotate when focusing? No One thing to note about the Bigma is that it is have so a good tripod/head is almost a must. I use a manfrotto 055pro + a manfrotto 393 gimbal head the combo works very well. Hand-held shots are not out of the question but your hit rate will take a hit. :-) The weight also means that handleld shoots tend to be short in duration. In good light the af is reasonably fast and accurate (at least on my K10D). Regards Patrick -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
