SMC Pentax 50mm f1.4 Soft Release it's pretty handy to have

it's pretty handy to have a full range of fisheye effects available with the turn of a ring

which is impressive

not super practical

but somewhat stiff: this shouldn't affect everyday use (not much reason to be rotating it around in most day-to-day situations) but it's worth noting

For best use

SMC Pentax 50mm f1.4 Soft Release it's pretty handy to haveThe SMC Pentax 50mm f1. 4 is a fast standard lens for Pentax K mount cameras. This is from the original K mount series, larger and heavier than the later Pentax M series. Cosmetic condition is good, with some paint and finish wear; optics are somewhat dusty, but free of haze or fungus. Smooth focusing, good diaphragm.