lens, 2006-) Schneider-Kreuznach D-Xenon 12–24 mm f4 ED (2007- ) (rebadged Pentax DA 12-24mm lens, 2005-) Schneider-Kreuznach D-Xenon 18–55 mm f3.5-5.6 AF (2007- ) (rebadged Pentax DA 18-55mm lens, 2004- ) Schneider-Kreuznach D-Xenogon 35 mm f2 (2006-) (rebadged Pentax FA 35mm lens, 1999-) Schneider-Kreuznach D-Xenon 50–200 mm f/4-5.6 AF (2006-) (rebadged Pentax DA 50-200mm lens, 2005-) Schneider-Kreuznach D-Xenon 100 mm MACRO 1:2.8 (2007-) (rebadged Pentax D FA 100mm lens, 2004-) Schneider-Kreuznach The Schneider-Kreuznach lenses feature shift and tilt movements for perspective control; they can be shifted by 12 mm and tilted by 8 degrees simultaneously. Schneider-Kreuznach PC-TS Super-Angulon 4.5/28 28mm f4.5 Schneider-Kreuznach PC-TS Super-Angulon 2.8/50 50mm f2.8 Schneider-Kreuznach PC-TS Makro-Symmar 4.5/90 HM 90mm f4.5 Sears Sears is an American commercial company that sells relabeled lenses and cameras at their own stores in the United States for a number of years. As the objective was mainly commercial, quality is very different among lenses. Quality on construction in some ones is very good and in some others is plain bad. But it seems to be consistent among the same model. Some of the Sears lenses were made to fit Sears Cameras with the Ricoh K-mount version and are identified as KR, but is prudent to verify it before using it on more modern cameras that may be damaged by the Ricoh pin. Sears 28 mm f/2.8 Auto MC Sears 50 mm f/1.4 Auto MC Sears 50 mm f/1.7 Auto MC Sears 50 mm f/2 Sears 50 mm f/1.7 Sears 55 mm f/1.4 Sears 55 mm f/2 Sears 28–70 mm f/3.5-4.5 Macro Sears 60–300 mm f/4-5.6 Macro (KR-mount) Sears 75–260 mm f/4.5 MC Macro Sears 80–200 mm f/4-5.6 Auto MC Sears MC 135 mm f/2.8 Sears Auto 2X Teleconverter Sigma Sigma is a Japanese manufacturer of cameras and lenses. It has made lenses for the K-mount for a number of years. And quality among them had varied a lot. After the launch of the K10D digital SLR it launched K-mount D series lenses. Such ones are designed to be used with the APS size camera, but older K-mount can be used as well. An increase in model numbers can be seen between 2007 and 2008 due to the success of the K10D, K100D, K100D Super, K110D, K20D and K200D cameras. Use of older Sigma lenses is possible but with caution, some Sigma older K-mount lenses are with the infamous Ricoh pin. Sigma 8