11-27-2010, 11:49 AM
Just testing the 70-300 VC compared to the old non-VC Tammy. At 300mm the VC lens is just not sharp. The subject distance information in the EXIF data is astonishingly different between the two lenses. E.g. for a distant subject the old lens reads "infinity", the VC 28.2 meters, which is definitely incorrect. For a closer subject the old lens reads 16.8 meters, the VC 14.1 meters. What kind of focusing issue do I have here? Of note, the DOF for a subject in 15 meter distance at 300mm/f5.6 would just cover 0.55 meters. Looks as if I have to return the VC...