Lots of patents, how many are real products?

Patent Number: 20090180199
EF 35-70 f/2.8 IS
EF 28-70 f/2.8 IS

I posted this a few days ago and removed it because I didn't really understand it.

Patent Number: 20090201585
EF 600 f/4 DO
EF 70-300 f/4.5-5.6
EF 28-35 f/1.6-2.1

Patent Number: 20090284847
EF 14 f/2.8
EF 24 f/2.8
EF 300 f/4 IS
EF 400 f/2.8 IS

As always with patents, I really don't speak their language and a lot can be lost in the translation. I'll keep this posted and let you folks dissect them.

thanks [NL]

cr

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26 Comments

  1. The 400 DO is a terrific lens, albiet pricey.

    The only issue I have seen with it is lower contrast. That’s easily remedied in post.

    Rumored about the 400 DO: Early production models had lower IQ than they do now. Nothing has been confirmed though.

  2. I agree. That’s a little too short. At that range, it only “replaces” two primes: 28mm and 35mm–that are not so far apart that it is a dramatic difference in use. At least replace 3 primes!

  3. Hi,

    What about the Patent Number: 20090284847 ?

    Does it mean that Canon works on a new 300mm f4 IS ?

  4. It doesn’t even replace them at all… Unless ofcourse the resolution, bokeh and other specs match the primes… (the 28 1.8 isn’t exactly stellar, but the 35 1.4 certainly will put up a fight)
    Oh, and it’s a very short range indeed, so what is the advantage of ‘zooming’ here? If they make it 20-50 f/2, it might be interesting, though.

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