Originally posted by Miserere Tommy, a lot of work goes into designing a new lens. It's not just the shape of the glass elements that comes into play, but also their placement and the material they're made out of. Most glass for lenses is supplied in standard sizes and materials; then it's the job of the optical engineer to organise a subset of them in such a way that they produce an image on the sensor plane.
This is most definitely patentable, the same way a book can be copyrighted. A book is nothing but a collection of words that belong to no one, yet the way they are organised is particular to each novel, story, etc. and can be copyrighted to protect the author's rights. Same thing with a lens.
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Yeah, you are right. My initial thought was maybe a little simplified. I have the impression that in some areas of technology it is a lot harder to get a patent than in others and definitely harder than to get a copyright on a book. It's not enough to make a new thing, it has to be revolutionary to qualify for a patent. But that is only my personal impression and I could be very wrong here. I actually like your book-analogy.....I guess technology can differ as much as books. It could be just-another-novel that hits the bestseller lists for a while and is then forgotten (but still, of course, a new and different story). Or it could be a revolutionary book than no one ever forgets.
To get back on topic a little....personally I would only buy a 16-28 if I had a full-frame sensor. With APS-C, the zoom range is a little strange....but with FF it is suddenly an ultra-wide and the short zoom-range is excused. Seems like Sigma and Tokina are planning for more FF cameras being sold. I can't imagine that many 1D MkIV users buying third part lenses so they must be aimed at the cheaper FF cameras. We haven't seen many of these....A850 is one. Do you think Sigma, Tokina and Tamron knows something about Pentax (or Sony, Canon, Nikon or Olympus for that matter) plans for sensor sizes in future cameras before we know?