Ok, I lost my head and bought another lens (3rd one in two weeks LOL). It's SMC Pentax-F 100mm f2.8 Macro, very rare one. The test of it above…

Busy bee, no crop.

No crop either

Araschnia levana, female / rusałka kratkowiec, samica, pierwsze pokolenie

70% crop of #3
Lovely photo of the bee covered in pollen!