FF confirmed! sorta...

Eagle_Friends · 10-04-2012, 04:36 PM

Quote:

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

Pentax patent for a 70-200mm f/2.8 lens | Photo Rumors

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

FF on the horizon right? right?

aurele · 10-04-2012, 04:41 PM

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.

Kryscendo · 10-04-2012, 04:43 PM

Oooh, a 70-200mm f2.8 would compliment my 16-50mm f2.8 and 50-135mm f2.8. :3

Julie · 10-04-2012, 04:47 PM

A Pentax weather resistant 70-200 2.8 sounds delicious...

Kona · 10-04-2012, 04:50 PM

Originally posted by Julie

A Pentax weather resistant 70-200 2.8 sounds delicious...

The pricetag surely won't be. Pentax has gone crazy with its lens pricing.

**maxfield_photo** · 10-04-2012, 04:53 PM

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.

DSims · 10-04-2012, 04:55 PM

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).

Julie · 10-04-2012, 05:04 PM

Originally posted by Kona

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....

DSims · 10-04-2012, 05:07 PM

Originally posted by maxfield_photo

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.

ducdao · 10-04-2012, 05:13 PM

Patent filing date: October 3, 2010

**Digitalis** · 10-04-2012, 05:52 PM

oh good, pentax is jumping on the 70-200 bandwagon.

Winder · 10-04-2012, 05:57 PM - **1 Like**

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.

Blue · 10-04-2012, 06:06 PM

Originally posted by Kona

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.

goubejp · 10-04-2012, 06:11 PM

Originally posted by aurele

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

goubejp · 10-04-2012, 06:12 PM

Originally posted by ducdao

Patent filing date: October 3, 2010

I read October 3, 2011 ?

10-04-2012, 04:36 PM	#1
Eagle_Friends Veteran Member Join Date: Feb 2010 Photos: Gallery \| Albums Posts: 971	FF confirmed! sorta... Quote: 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 Pentax patent for a 70-200mm f/2.8 lens \| Photo Rumors look a 70-200mm f2.8!!!!! FF on the horizon right? right?

10-04-2012, 05:57 PM - 1 Like	#12
Winder Veteran Member Join Date: Apr 2010 Location: Tennessee Posts: 6,617	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.

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10-04-2012, 04:41 PM	#2
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	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
Kryscendo Senior Member Join Date: Sep 2011 Posts: 222	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
Julie Veteran Member Join Date: Aug 2010 Location: Illinois Photos: Gallery \| Albums Posts: 1,069	A Pentax weather resistant 70-200 2.8 sounds delicious...

10-04-2012, 04:50 PM	#5
Kona Senior Member Join Date: Aug 2011 Location: Victoria Photos: Albums Posts: 201	Originally posted by Julie 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
maxfield_photo Site Supporter Join Date: Mar 2011 Location: Cincinnati, OH Posts: 1,216	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
DSims Veteran Member Join Date: Sep 2009 Location: Southern California Photos: Gallery \| Albums Posts: 3,236	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
Julie Veteran Member Join Date: Aug 2010 Location: Illinois Photos: Gallery \| Albums Posts: 1,069	Originally posted by Kona 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
DSims Veteran Member Join Date: Sep 2009 Location: Southern California Photos: Gallery \| Albums Posts: 3,236	Originally posted by maxfield_photo 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
ducdao Pentaxian Join Date: Dec 2009 Location: Montreal/Vermont Posts: 2,160	Patent filing date: October 3, 2010

10-04-2012, 05:52 PM	#11
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	oh good, pentax is jumping on the 70-200 bandwagon.

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10-04-2012, 06:06 PM	#13
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,377	Originally posted by Kona 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
goubejp Veteran Member Join Date: Oct 2007 Location: France Photos: Albums Posts: 804	Originally posted by aurele 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 2436 = sqrt (1212 + 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
goubejp Veteran Member Join Date: Oct 2007 Location: France Photos: Albums Posts: 804	Originally posted by ducdao Patent filing date: October 3, 2010 I read October 3, 2011 ?