Promaster 2x autofocus teleconverter

Lens Search. Log in or register to remove ads. The 1. This thread is a discussion of diffraction issues when using TC's. Pepe Guitarra. Aditya Panda. Style Selector. All times are GMT The time now is AM. See also: NikonForums. It's great to see you back on the forum! Have you considered joining the community?

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Lens Compatibility. Pentax Serial Number Database. In-Depth Reviews. SLR Lens Forum. Sample Photo Archive. Pentax Camera Reviews. Check Shutter Count. SLR Discussion Forums. Mirrorless Discussion Forums. Pentax KP. Pentax K-3 III. Pentax K New Posts. Today's Threads. Recent Updates. Unanswered Threads. Recently Liked Posts. Forum RSS Feed. Promaster Spectrum7 AF 1. Recommended By. Lens Review Date: August 18, Sharp, able to use with all AF lenses see text.

Camera Used: Pentax K When attached to any Pentax or Sigmas autofocus lens including my Sigma mm F2. All in all a great buy and I am very happy with my purchase! The Rokunar TC works perfectly out of the box as it provides full AF and metering functionality with this lens. So grab one of these if you can find one of these at a reasonable price. Lens Review Date: February 23, Camera Used: K5iis.

On equivalent aperture settings Promaster is almost twice faster then Kenko 2x and more sharper than Pentax 1. Acceptable IQ loss on the border frame at F3. Focus is fast. Actual product may vary slightly due to ongoing improvements in design. Our warranty provides coverage for defects in manufacturing only while supplies last.

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