Originally posted by LadyGoodman Thank you everyone for the responses and advice. I think I知 going to forgo repairing it, put the 50 bucks towards something and be in the lookout for a used D-FA 100/2.8 macro. Thank you!!!!
when looking for your D FA 100mm F2.8 macro
be aware that there are several versions with common optical design but other differences between them and different prices levels:
Pentax-D FA 100mm F2.8 WR Macro Review
Specifications
The lens covers the full 24x36mm format, not just APS-C. The aperture blades are rounded, delivering a smoother bokeh which is important for a macro lens. However, unlike its predecessor, it has no aperture ring.
The optical design is the tried-and-proven formula of the previous generation D FA 100mm F2.8 Macro lens, which in turn had inherited the optical design from the well-respected FA 100mm F2.8 and F 100mm F2.8 macro lenses introduced in 1991 and 1987, respectively. None of these earlier lenses had rounded aperture blades.
Read more at:
Pentax-D FA 100mm F2.8 WR Macro Review - Specifications | PentaxForums.com Reviews
whether paying for the " difference " matters depends on you. I am very satisfied with my non WR D FA 100mm F2.8 Macro