This FotodioX Pro Pentax K to Sony A Lens Adapterfrom FotodioX Pro Pentax K to Sony A Lens Adapterenables the use of your Pentax K lenses on Sony A mount SLR and DSLR cameras. It features a durable brass construction with stainless steel finish and a leaf spring ensures a secure connection between the lens and adapter. Additionally, through the use of a 1.4x multi-coated focus correction lens, this adapter is designed to maintain infinity focus. This correction lens can also be removed to render the adapter as an extension tube for macro shooting.

Pentax K to A Mount DSLR    1.4x Multi-Coated Focus Correction Lens    Maintains Infinity Focus    Leaf Spring Mount Design    Brass with Stainless Steel Finish

This manual adapter does not maintain automatic lens control between the camera and lens; aperture priority or manual shooting modes should be used, as well as stop-down metering for exposure control.

Related Questions and Answers

Q: 1. Does it also work with Pentax PK mount lenses?

A: Wikipedia says PK is an abbreviation for Pentax K so it should.

Q: 2. Does anybody know if you can use the auto focus 645 pentax lens to be electronically connected via an adapter to a nikon D800 SLR? I will be grateful for any help. Thanks, John Dufton

A: There is no electronic connectivity between Pentax AF lenses and a Nikon digital body with this adapter. Manual focus and manual exposure control. If you chose this route, you're going old-school so be prepared to miss a few shots unless you're stopped down for a wider DOF.

Q: 3. Description mentions iris control on the adapter, but there is no such lever or control from the photos. Can you confirm if it is possible?

A: Yes there is iris control with this adapter.

Q: 4. would the medium format pentax 6x7 lenses fit this adapter and work on nikon digital (d610)and 35mm(nikon f100) film bodies?

A: There is, I believe, another Fotodiox adapter specifically for Pentax 6X7 lenses to Nikon F-mount. Pentax 6X7 lenses are much larger.

Q: 5. How do I remove the 1.4 lens from the Fotodiox Pro?

A: Typically the lens cannot be removed.

Q: 6. does this work with full frame sony a7 without cropping?

A: Tried on 3 different lenses. No cropping.

Q: 7. How much macro extension does it provide?

A: When using the FotodioX Pentax K Lens to Sony E-Mount DLX Stretch Adapter, the adapter gives one between 12mm and 20mm extension.

Q: 8. Does this adapter work with wide apartures like F1.2 or f1.4?

A: Yes. Is make sure to match the solid white dot to the solid red dot. This is allows you to set the aperture manually.. You may have to stop down a bit it's a bit the compensate for vignetting. Note the lens is purely manual in this this configuration and none of the auto features will work.

Q: 9. does this fit a nikon d850 camera?

A: Yes, it does.

Q: 10. How badly does this product effect image quality? Is there a lot of aberrations, soft focus, etc?

A: This adapter is very good in terms of maintaining the sharpness and offers a good build quality.