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01-10-2010, 12:50 PM   #1
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Possible Solution for Fast, Cheap(er), Normal Prime?

I and others have posted remarks in the the recent past, ranting about the lack of a fast, affordable prime lens in the normal - which is to say the 28-35mm range - for APS-C cameras. Pentax has its wonderful FA 31mm f/1.8 Limited and leftover FA 35mm f/2.0 lenses, of course. But the Limited is genuinely unaffordable for many of us and the FA 35 is now simply overpriced for what it is.

Well, enter Samsung's new NX10... which will apparently offer three lens options when it first hits the market. There'll be two kit zooms: an 18-55mm f/3.5-5.6 and a 50-200mm f/4-5.6 (both image stabilized). But there'll also be a 30mm f/2.0 prime without stabilization. We also know Samsung is talking about an adaptor that will allow some Pentax lenses to be used on the NX10, although details remain elusive.

But how about turning that question around? What about an adaptor that would allow the 30mm Samsung prime to be used on Pentax cameras? The lens was designed with an APS-C sized sensor in mind. And since the Samsung lenses are quite small to begin with (since their application is on an EVIL camera), a reasonably sized adaptor might still result in a nice set-up on a Pentax DSLR body.

I don't know who is actually manufacturing the Samsung-branded lenses for the NX10. We know the lenses for Samsung's DSLRs came from Pentax. Pentax maintains it had no input on the NX10 - but does that include the lenses? And even if the NX10's lenses come from elsewhere, might they be at least as good as the better Sigmas and Tamrons? And if they do come from Pentax, would Pentax bar the creation of an adaptor for use on its cameras - much in the way it won't allow some Tokinas in Pentax mounts? If Pentax gets a version of the NX 10, this might be a moot point - but I see no evidence of that and don't know if it would even make sense.

Granted, there are a lot of questions here. But the thought of a potential solution to the fast, cheap(er), normal prime question coming from Samsung's NX10 is interesting and exciting for me. Any thoughts?

01-10-2010, 01:00 PM   #2
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Because of registration distance, it will not be able to focus to infinity on a K-mount.
You can go further out (as with the adapter from K to EVIL NX) but not the other way.
There is, of course, the very affordable Sigma 30mm lens, which in regards to center sharpness is as good as the 31mm and the 35mm.
01-10-2010, 01:03 PM   #3
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As Diffusion says, it won't work mate. You'll never be able to focus the lens because the registration distance is too different.
01-10-2010, 03:40 PM   #4
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The people who make the Samyang/Vivitar/Bower/Rokinon etc. 85mm/1.4, 500/6.3 mirror and 8mm fisheye have said they'll have a 35mm f1.4 lens this summer. It'll be manual focus and KA mount. The other lenses seem to be a good value for the money. If this one sells for $250, it will be a lot easier than finding a Pentax-A 35mm f2.0.

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