JC Penney Auto 2x 增距鏡（Pentax K 接環相機與鏡頭專用）

Finally got this mounted on my K1000 and the 2x magnification is exactly what I needed for wildlife shots. The build quality feels solid, definitely a great vintage find for Pentax shooters.

Put this on my Pentax MX and it's surprisingly sharp for a 2x teleconverter. The auto aperture coupling works perfectly, so no fumbling with stop-down metering. Solid vintage build quality that really complements the old camera.

Bought this as a collectible for my old Pentax kit, and the metal build feels rock solid for something this age. The 2x magnification works exactly as expected on my K-mount lenses, and the auto aperture coupling engages smoothly. A nice piece of history that still functions perfectly.