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10-04-2012, 04:36 PM   #1
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FF confirmed! sorta...

QuoteQuote:

Pentax filed a patent 2012-189817 in Japan for a 70-200mm f/2.8 lens:

  • Patent filing date: October 3, 2010
  • Zoom ratio: 2.82
  • Aperture: 2.9 - 3.0
  • Focal length: 70.21 - 198.32mm
  • Image height: 21.64mm
  • Lens length: 296.16mm
  • 17 images lens group configuration 14
  • 4 ED elements
  • 2 low-dispersion elements
  • Internal zoom and f focusing


look a 70-200mm f2.8!!!!!

FF on the horizon right? right?



10-04-2012, 04:41 PM   #2
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The height of the image created is only 21mm whereas FF supposed to be a little less then 24mm.

So, i won't be happy too fast.
10-04-2012, 04:43 PM   #3
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Oooh, a 70-200mm f2.8 would compliment my 16-50mm f2.8 and 50-135mm f2.8. :3
10-04-2012, 04:47 PM   #4
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A Pentax weather resistant 70-200 2.8 sounds delicious...

10-04-2012, 04:50 PM   #5
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QuoteOriginally posted by Julie Quote
A Pentax weather resistant 70-200 2.8 sounds delicious...
The pricetag surely won't be. Pentax has gone crazy with its lens pricing.
10-04-2012, 04:53 PM   #6
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I'm not sure I follow the logic. This patent was filed two years ago and the image circle this lens projects wouldn't fill a 35mm frame. It is odd though that it's in a focal length commonly associated with a classic tele zoom.
10-04-2012, 04:55 PM   #7
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The slightly smaller image circle gives credence to my idea that Pentax may release a ~1.1 or 1.2 crop ratio K-mount camera, in order to make sure in-camera SR works will all legacy FF lenses. It's not like they haven't done something like this before (645D).
10-04-2012, 05:04 PM   #8
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QuoteOriginally posted by Kona Quote
The pricetag surely won't be. Pentax has gone crazy with its lens pricing.
I know... if it is going to be priced high, it had better really kick Tamron's butt (as the Tamron can be had new for around $750). I can't imagine the Pentax version being cheap, all you have to do is look at the price of the DA* 16-50 2.8 and 50-135 2.8....

10-04-2012, 05:07 PM   #9
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QuoteOriginally posted by maxfield_photo Quote
This patent was filed two years ago and the image circle this lens projects wouldn't fill a 35mm frame.
I can't read Japanese, but are you sure the filing date isn't March 10, 2011? That would still be interesting, since it's pre-Ricoh. And it wouldn't have contradicted any of Hoya's claims that it wasn't working on FF, since it's a bit cropped.
10-04-2012, 05:13 PM   #10
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Patent filing date: October 3, 2010
10-04-2012, 05:52 PM   #11
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oh good, pentax is jumping on the 70-200 bandwagon.
10-04-2012, 05:57 PM - 1 Like   #12
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21mm Image height would make it perfect for an 28.7x19mm APS-H sensor with IBIS.

The patent for the 12-24mm F/4 replacement was also filed in 2010. We should see it this spring.

Last edited by Winder; 10-04-2012 at 06:04 PM.
10-04-2012, 06:06 PM   #13
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QuoteOriginally posted by Kona Quote
The pricetag surely won't be. Pentax has gone crazy with its lens pricing.
Given the price of the DA* 60-250/4, you are correct.
10-04-2012, 06:11 PM   #14
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QuoteOriginally posted by aurele Quote
The height of the image created is only 21mm whereas FF supposed to be a little less then 24mm.

So, i won't be happy too fast.
Image circle needed for 24*36 = sqrt (12*12 + 18 * 18) = 21,633 mm precisely
The patent is for a lens with an image circle of 21,64 mm so it fits;
I can't read Japanese but I don't see a patent for a lens giving image dimensions by its width and its height. It is the image circle that is specified here
10-04-2012, 06:12 PM   #15
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QuoteOriginally posted by ducdao Quote
Patent filing date: October 3, 2010
I read October 3, 2011 ?
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