|Sigma 17-50mm F2.8 EX DC HSM Pentax||669||20||12|
|Pentax smc PENTAX DA 16-45mm F4 ED AL||335||18||9|
|Pentax smc PENTAX DA Star 16-50mm F2.8 ED AL (IF) SDM||736||15||10|
|Pentax smc DA 12-24mm F4.0 ED AL (IF)||700||15||9|
|Pentax smc PENTAX DA 18-55mm F3.5-5.6 AL II||125||15||7|
|Pentax smc PENTAX DA 55-300mm F4-5.8 ED||475||14||7|
|Tamron SP AF 28-75mm F/2.8 XR Di LD Aspherical [IF] Pentax||499||14||5|
|Pentax smc Pentax DA 18-250mm F3.5-6.3 ED AL [IF]||499||13||8|
|Sigma 8-16mm F4.5-5.6 DC HSM Pentax||699||13||8|
|Sigma 18-200mm F3.5-6.3 II DC OS HSM Pentax||349||13||6|
|Pentax smc DA 18-270mm F3.5-6.3 ED SDM||749||13||6|
|Pentax smc PENTAX DA 50-200mm F4-5.6 ED||261||12||5|
|Tamron AF18-200mm F/3.5-6.3 XR Di-II LD ASPHERICAL (IF) MACRO Pentax||645||9||5|
Sigma also does well with the 17-50mm (26-77mm equivalent) f2.8 EX DC HSM in the zoom category. It’s also well corrected and has high peak sharpness when stopped down.
Full aperture performance isn’t bad either, but it’s better at the longer end. In second place is the moderate speed Pentax smc DA 16-45mm (25-69mm equivalent) f4 ED AL a good all round performer with a useable maximum aperture. This is followed very closely by the Pentax smc DA 16-50mm (25-77mm equivalent) f2.8 ED AL (IF) SDM in third place, but sharpness at the initial aperture is somewhat disappointing at the longer end even on the K-5 IIs.