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Author Topic: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6  (Read 7714 times)

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Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« on: August 31, 2012, 06:15:44 AM »

More Patents

A couple of new lens formula patents which seems to address lowering chromatic aberrations in a new way


Patent Publication No. 2012-163746



  • 2012.8.30 Release Date

  • 2011.2.7 filing date


Example 4



  • Zoom ratio 4.67

  • 56.11 – - 131.85mm f = 28.21 focal length

  • Fno 4.12 -. 4.89 – 5.77

  • Half angle of view ω = 37.48 – 21.09 – 9.32deg.

  • Image height 21.64mm

  • 242.67 – - 266.43mm 224.00 overall length of the lens

  • BF 55.79 – 70.40 – 82.95mm

  • 20 sheets of 14 group lens configuration

  • Two two-sided aspherical

  • Three low-dispersion glass

  • Four Super UD glass

  • 102.40mm effective diameter of the first surface

  • 5-group zoom negative positive negative


Example 5



  • Zoom ratio 10.31

  • 93.64 – - 307.06mm f = 29.77 focal length

  • Fno 3.31 -. 4.71 – 5.85

  • Half angle of view ω = 36.00 – 13.01 – 4.03deg.

  • Image height 21.64mm

  • 263.66 – - 304.01mm 209.34 overall length of the lens

  • BF 61.72 – 89.40 – 106.84mm

  • 18 sheets 12 groups lens configuration

  • Three 3 aspherical surface

  • Three low-dispersion glass

  • 2 UD glass sheets

  • 84.36mm effective diameter of the first surface

  • 5-group zoom negative positive negative

  • In the zoom lens of the positive lead type, reducing the chromatic aberration of magnification of the secondary


Source: [EG]

cr


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Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« on: August 31, 2012, 06:15:44 AM »

Viggo

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #1 on: August 31, 2012, 06:33:38 AM »
Because they sold so many of the old 28-300?  ;D
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marekjoz

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #2 on: August 31, 2012, 07:27:11 AM »
Because they sold so many of the old 28-300?  ;D

No. Because they can :)
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nicku

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #3 on: August 31, 2012, 07:50:52 AM »
the 28-135 will finally be replaced ( maybe). I used that lens many years ago......  :D

Rienzphotoz

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #4 on: August 31, 2012, 08:31:35 AM »
Because they sold so many of the old 28-300?  ;D

No. Because they can :)
+1 for marekjoz
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Rienzphotoz

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #5 on: August 31, 2012, 08:35:16 AM »
This is good news ... I wish they will start production asap ... Canon can count me in as their customer for the EF 28-300 ... it will be incredibly convenient during vacations.
Canon 5DMK3 70D | Nikon D610 | Sony a7 a6000 | RX100M3 | 16-35/2.8LII | 70-200/2.8LISII | 100/2.8LIS | 100-400LIS | 40/2.8 | 50/1.4 | 85/1.8 | 600EX-RTx2 | ST-E3-RT | 24/3.5 T-S | 10-18/4 OSS 16-50 | 24-70/4OSS | 55/1.8 | 55-210 OSS | 70-200/4 OSS | 28-300VR | HVL-F43M | GoPro Black 3+ & DJI Phantom

Viggo

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #6 on: August 31, 2012, 09:32:35 AM »
This is good news ... I wish they will start production asap ... Canon can count me in as their customer for the EF 28-300 ... it will be incredibly convenient during vacations.

Not if it's the L-version...
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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #6 on: August 31, 2012, 09:32:35 AM »

Rienzphotoz

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #7 on: August 31, 2012, 09:37:19 AM »
This is good news ... I wish they will start production asap ... Canon can count me in as their customer for the EF 28-300 ... it will be incredibly convenient during vacations.

Not if it's the L-version...
For me it doesn't matter if it is L or non-L ... it should not be the same weight as the current version .... if the new 28-300 (even it is an L version) is the same weight as 70-300L than it would be PERFECT.
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neuroanatomist

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #8 on: August 31, 2012, 09:42:46 AM »
This is good news ... I wish they will start production asap ... Canon can count me in as their customer for the EF 28-300 ... it will be incredibly convenient during vacations.
Not if it's the L-version...

There's a non-L 28-300mm from Canon?  I haven't seen one...  You may be thinking of the old 28-200mm.

FWIW, I use my 28-300L for travel, and it is very convenient.  Is it big and heavy?  Yes.  But it's no heavier than the two-lens setup it replaces (24-105 + 70-300L), and means no lens changes required.

the 28-135 will finally be replaced ( maybe). I used that lens many years ago......  :D

For many years, the 28-135mm was the kit lens for the lower end of the lineup, film cameras, that is.  Seems like a refreshed 28-135mm would be a good kit lens for an entry-level FF dSLR...
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simonxu11

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #9 on: August 31, 2012, 09:49:30 AM »
This is good news ... I wish they will start production asap ... Canon can count me in as their customer for the EF 28-300 ... it will be incredibly convenient during vacations.
Not if it's the L-version...

There's a non-L 28-300mm from Canon?  I haven't seen one...  You may be thinking of the old 28-200mm.

FWIW, I use my 28-300L for travel, and it is very convenient.  Is it big and heavy?  Yes.  But it's no heavier than the two-lens setup it replaces (24-105 + 70-300L), and means no lens changes required.

the 28-135 will finally be replaced ( maybe). I used that lens many years ago......  :D

For many years, the 28-135mm was the kit lens for the lower end of the lineup, film cameras, that is.  Seems like a refreshed 28-135mm would be a good kit lens for an entry-level FF dSLR...

I was thinking the same thing, just hope they annouce the entry FF in September

WoodyWindy

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #10 on: August 31, 2012, 01:15:28 PM »
Actually, the 28-135 IS was introduced with the much-adored EOS 3, and was considered a premium (though non-L) optic for a long time before it became the big-box store kit lens with the x0D series.

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #11 on: August 31, 2012, 01:17:34 PM »
The 28-135mm is overdue for an update. Perhaps a new Kit lens for the Budget FF body to come? 8)

paulc

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #12 on: August 31, 2012, 03:27:15 PM »
Is anybody else afraid of what the new 28-135 is going to cost with that parts list?  I'm thinking that can't possibly be the new kit lens, too expensive.

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #12 on: August 31, 2012, 03:27:15 PM »

Rienzphotoz

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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #13 on: August 31, 2012, 03:46:23 PM »
Is anybody else afraid of what the new 28-135 is going to cost with that parts list?  I'm thinking that can't possibly be the new kit lens, too expensive.
Not really coz I would never buy such a relatively limited zoom range (28-135) with variable aperture ... besides I like my 24-105 f/4 L IS way too much to go the 28-135 way. But EF 28-300 would be incredibly convenient even it is a variable aperture zoom lens ... I would like it even more if it was an L lens but with the same size and weight of 70-300L ... all wishful thinking at this moment  ;D
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Re: Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6
« Reply #13 on: August 31, 2012, 03:46:23 PM »