Pentax K100D  type_Digital Camera 8 Macro USM is a

8 Macro USM is a macro lens for Canon EF-S mount digital SLR cameras that provides 1:1 magnification without the use of extension tubes

automatic exposure and focusing (with manual overrides)

no effect on function

any lens with an 82mm diameter (or 77mm with the included stepping ring)

Pentax K100D &nbsptype_Digital Camera 8 Macro USM is aThe Pentax K100D is a K mount APS C format camera with shutter speeds from 30s to 1 4000s. It has a 6 megapixel CCD sensor with a built in shake reduction system and, perhaps best of all, runs on 4 standard AA batteries. Compatible with nearly all Pentax K mount lenses, manual or autofocus. This one has just under 20k actuations and is in excellent cosmetic condition, with only minor wear.