Pentax smc PENTAX-DA 40mm F2.8 XS Lens on film

PentaxDA40XS-7082 PentaxDA40XS-7084

The Pentax smc PENTAX-DA 40mm F2.8 XS Lens is an impossibly thin pancake lens that was originally designed to go with the digital APS-c Pentax K-01 but as some people have noted it also covers a full 35mm film frame.   I needed to find out for myself so I mounted it to my Pentax MZ-6 a camera that I had given away but received back and am very happy about that.  I had really under rated the camera, while not built to take a beating like a professional camera, it has all the functionality of one.  Back to the lens though. While the lens is very thin it shouldn’t be all that surprising as many 35mm film point and shoot cameras have similar sized lenses that are often even closer to the film plane.  As a lens used with 35mm film I can say that it does an excellent job with very little vignetting which is the one thing you might expect to see when using an APS-c lens.  The fact that it takes up next to no room in a camera bag and that it can be used on both film and digital really makes this a must carry lens for me.


2 Responses to “Pentax smc PENTAX-DA 40mm F2.8 XS Lens on film”

  • DA40 XS on the Q | Wallace Koopmans Artlog Says:

    […] The Pentax Q has a tiny little mouse dropping of a sensor, 1/2.3″ (a measurement as clear in information as liters/100km would be to a horse that just found out he had one horespower)   What it means though is that it only has about 1/30 of the surface area of a 35mm film frame.  If you want to equate the field of views between those two disparate sizes while using the same lens you need to multiply the focal length by 5.6 on the Q.  In this case the DA 40 XS would wind up being the equivalent of a 224mm f2.8 lens on 35mm film.    And that is what makes this a neat little combination, it functions like a close focus telephoto and because the lens is so thin it fits the little camera nicely.  Another benefit of the small sensor is that it provides greater depth of field for a given aperture.  I know that sounds counter intuitive in this ‘thin is in’ shallow depth of field mad world but when you’re measuring it in millimeters having a little extra in focus without the need to stop the lens down can be a real advantage.  So not only is the DA40 XS a great lens on an APSc DSLR with an adapter  it fits nicely on the Pentax Q and here is another hint ‘it fits on a 35mm SLR’ too  Pentax-DA 40mm F2.8 XS on film. […]

  • Pentax Full Frame and APS-c Lenses | Wallace Koopmans Artlog Says:

    […] More similar things can be seen here DA 40 XS on film […]

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