Put this lens (SMC Pentax-F 35-80mm f4-5.6) through its paces today with a photoshoot of a dog in the studio. It proved very reliable, mounted on my Pentax K70. : r/VintageLenses
The SMC Pentax-FA 35-80 mm f/ 4-5.6 Lens. Specs. MTF Charts. User Reviews.
SMC Pentax F Zoom Lens 35-80 Mm F/4-5.6 EXCELLENT - Etsy
Pentax SMC Pentax-F 35-80mm f/4-5.6 Zoom Lens K Mount with Caps (#10385) | eBay