The Pentax K-3 was a justified winner in our reader poll for the Best DSLR of 2013, and now our friends and collaborators over at DxOMark have been looking into how various lenses score on it. In the process, they've also reviewed many of Pentax's lovely 'Limited' primes in their latest 'HD' incarnations. See the links below for DxOMark's reviews.  

 Pentax Lens reviews 
 DxOMark Review: Best lenses for the 24M-Pix Pentax K-3
 DxOMark Review: Pentax HD DA 21mm f/3.2 AL Limited
 DxOMark Review: Pentax HD DA 40mm f/2.8 Limited
 DxOMark Review: Pentax HD DA 15mm f/4 Limited
 DxOMark Review: Pentax HD DA 35mm f/2.8 Macro Limited
 Other recent DxOMark reviews
 DxOMark Review: Canon EF 17-40mm f/4L IS USM
 DxOMark Review: Canon EOS M2
 DxOMark Review: Samsung NX1000 and NX1100
 DxOMark Review: Panasonic DMC-FZ70
 DxOMark Review: Sony Cyber-shot DSC-RX10