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Key Features
- K Mount Lens/APS-C Format
- 76.5-207mm (35mm Equivalent)
- Aperture Range: f/2.8 to f/22
- Three Extra-Low Dispersion Elements
The smc PENTAX-DA* 50-135mm f/2.8 ED (IF) SDM Lens from Pentax is a telephoto zoom designed for APS-C-format K mount DSLRs, where it will provide a 76.5-207mm equivalent focal length range. Three extra-low dispersion elements are incorporated within the optical design, which help to reduce chromatic aberrations and improve clarity and sharpness. Benefitting handling, the constant f/2.8 maximum aperture ensures consistent performance throughout the zoom range and also enables working with shallow depth of field and selective focus techniques. This lens also features an SDM autofocus motor that provides quick, near silent focusing performance and a Quick Shift Focus System for instantly switching between manual and autofocus operation.
More DetailsSee any errors on this page? Let us know
question
I have Pentax K-1 camera. Can I use this lens on mu Pentax?
yes you can use it with the K1. I do it all the time however your K1 will operate as a crop sensor camera. other than that it will be fine.
Date published: 2020-04-09
question
Will it work on Canon 5D with K to EF mount adapter?
B&H does not carry an adapter that would enable one to mount a K-mount lens onto a Canon EOS body, nor am I aware of one on the market. That being said, even if you were able to find an adapter, this lens is designed for APS-C size sensors, so its image circle wouldnt cover the 5Ds entire sensor. You would also likely lose all auto functions.
Date published: 2019-09-28
question
is f/2.8 available through out all zoom positions?
Yes, it is.
Date published: 2019-07-09