- 1. (and most importantly) a convenient range of focal lengths. 2. very sharp up to 60 mm at least, further - see comments. 3. dust and moisture protection 4. confident fast focusing on the K-30 5. Vignetting is minimal or almost non-existent 6. small for such focal chromatic aberrations
- 1. soft at 85 mm (as well as Nikon's counterpart), but . (see comments) 2. big and quite heavy 3. price.