{"product_id":"pentax-17x-smc-pentax-f-af-adapter","title":"Pentax 1.7x SMC Pentax-F AF Adapter - Accessory","description":"\u003cp\u003eAutofocus teleconverter made for K mount SLRs by Pentax. It multiplies the lens' focal length by 1.7x in exchange for some light transmission (1.5 EV). It can also allow manual focus K mount lenses to be used with autofocus as long as the camera has a built-in screw focus motor. The adapter does not transmit focal length information from the lens to the camera. It will work with any K mount lens back to the Pentax-K and Pentax-M series as long as their maximum aperture is equal to or faster than f2.8. Metal body available in black.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePentax 1.7x Teleconvrter SMC Pentax-F AF Adapter (6 elements, 4 groups)\u003c\/li\u003e\n\u003cli\u003eSize: 64 x 26 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 135g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pentax","offers":[{"title":"Default Title","offer_id":38219082203334,"sku":"pj4s","price":0.0,"currency_code":"CHF","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/9496\/7750\/files\/1_20-_20KR6932-1_8cd525a7-ff2d-4d0e-99c3-5cc2ca5f8a5b.jpg?v=1776689688","url":"https:\/\/kamerastore.com\/en-ch\/products\/pentax-17x-smc-pentax-f-af-adapter","provider":"Kamerastore","version":"1.0","type":"link"}