Pentax HD DA 35mm f2.8 Macro Limited lens review: Discerning choiceBy Kevin Carter - Friday December 20 2013 Lens Review
When compared to the previous smc version on the K-50 the new model performs very similarly, but the slightly lower overall DxOMark score is attributable to slightly lower sharpness across the field – there has been no increase in the peak sharpness though the application of the HD coatings appears to have lowered sharpness in the periphery.
Intriguingly the transmission score remains the same, as does distortion and vignetting, though that’s hardly surprising.
The good news? The new model has slightly lower chromatic aberration, but overall the result isn’t as clear-cut as you might hope. Perhaps the lenses are optimized for as yet to be released high-resolution models.