EF 24-105 f/3.5-5.6 IS Patent

[Canon Rumors]

• Patent Publication No. 2010-237455
• Release date 2010/10/21
• Filing date 2009/03/31
• Example 6
• Focal length f = 24.90 – 102.02mm
• Fno = 3.62 – 5.82
• Angle of 81.96 – 23.94 °
• Image Circle 43.28mm
• Total lens length 119.84 – 151.84mm
• BackFocus 38.50 – 51.35mm
• An aspheric surface
• Patent Technology
• Pojitiburidotaipu zoom
• Zoom a positive polarity
• Chromatic aberration, spherical aberration, coma aberration correction
• Refractive index and placement optimization
• Moving the second lensInnerfocusing equation
• Zooming
• All the lens moves
• Miniaturization

It looks like a cheap zoom for full frame. 5D3 low end kit lens?

[source]

cr

[futrtrubl]

Minor thing.
"Pojitiburidotaipu zoom" should be "Positive ride type zoom". Though I would have expected them to spell it raido ライド.

エドワード ie Edward ;']

[dpgizmo]

I smell a lower-end full frame body is coming...

[epsiloneri]

I wonder why it's not called 25-102mm, or even 25-100mm, since that seems to be the focal length range (for focus at infinity, I assume).

"Pojitiburidotaipu zoom" should be "Positive ride type zoom".

Ah yes, I wondered about that too. Not that "positive ride type zoom" is much more illuminating (to me).

[bvukich]

I smell a lower-end full frame body is coming...

It would almost have to.  Who in their right mind would want to put this thing on a 5D MkII/III?

But even then, it would have to have IQ significantly better than the (not entirely horrible, worth the $200 I paid for mine, but not much more) 28-135 to ever find a home even on a budget FF.  They really can't price it under the 28-135, so they'll pretty much have to beat it on quality.

[traveller]

If Canon did make a budget full-frame model it would have to be considerably cheaper than the A850.  Sony's 'low-cost full-frame' idea has failed to win them the market share that I think they hoped it would.  A Canon budget full-frame camera would have to be around the 7D's current retail price, or who'd bother?

[bvukich]

If Canon did make a budget full-frame model it would have to be considerably cheaper than the A850.  Sony's 'low-cost full-frame' idea has failed to win them the market share that I think they hoped it would.  A Canon budget full-frame camera would have to be around the 7D's current retail price, or who'd bother?

Sony's idea of low cost is only about $200 less than a 5DMkII, thats probably a good reason why it didn't sell well.  And after saving that measly $200 you're still stuck with a Sony.

I don't think they need to get as low as 7D pricing, but if the street price was anywhere in the $1700 neighborhood, it would probably sell great.

[dpgizmo]

Given that D7000 is attracting lot of attentions in crop world, Canon might fight back in another way - a full frame in current 7D price range but slower FPS, lot better IQ and iso performance. Unless, we will see another better placed crop sensor coming out but 7D is only about one year old, no reason to be replaced any time soon.

[IllegalFun]

I sincerely hope this is just a patent...
there are far too many cheap lenses floating around, clogging up valuable shelf space

I know the 24-105 L IS is only ~5 years old.... but it needs the IS to be updated.
that would go well with a 5D mk3
and the 28-135 would go well with a 3D

also most people who upgrade to full-frame have thought long and hard, and buy full-frame lenses before, so a cheap kit lens might not play in Canon's favour.

[bvukich]

I sincerely hope this is just a patent...
there are far too many cheap lenses floating around, clogging up valuable shelf space

X2

[Grumpy]

Photorumors also show a Canon patent for a 600/f5.6 http://photorumors.com/2010/11/22/canon-files-a-patent-for-a-600mm-f5-6-lens/#more-7020 Now, this is way more interesting stuff.

Regards,

Rob

[Digited]

I am one who of those who has been waiting for a better standard zoom lens with IS for some time.  If this is what will be offered, I think I am disappointed. 

It is odd that it has a worse range than the new 15-85 cropper or 28-135 FF, and mostly worse aperture than the existing 24-105. 

Requiring larger lenses for full frame,  I don't see how it could cost less than the 15-85 with out making the IQ worse, or the same quality and making it not much cheaper than the existing 24-105 at best. 

So it is likely somewhere between a 28-135 and 15-85 in quality and around the 15-85 in price.  I would have preferred a FF version of the 15-85 for around $900, a 24-70 IS, with the same IQ or better, or a new 24-105 with lower distortion and higher mtf at 24, and better IS.

[JLN]

Interesting... it's been quite awhile since canon has released a non-L EF lens.

While it's not a lens for the cognoscenti per say, i do like that they're showing interest in other market segments.

[Waleed Essam]

It's either that we are crazy, Canon are crazy, or maybe just maybe something really great is about to happen!!

Everybody keeps on talking on the new FF mpix boost and current lenses resolving this boost etc... so why on earth are they releasing a cheap kit lens that will certainly have less IQ than the 24-105L ? who will put this on 5DIII when people are already doubting the ability of the 24-105L to resolve the extra mpix!!!

UNLESS... MAYBE... Canon will divide the 5D series into 2 categories (like they did the 50D) one with better AF higher than the current 5D price (3d), and a lower same AF in a cheaper body (6d)!

So we're crazy: Any crappy lens can resolve any sensor
Canon are crazy: They don't care that lenses can or cannot resolve the new sensors
Something great: 3D & 6D!

I hope it's the last one, this is the only common sense answer to the existence of this lens IMO.

[dilbert]

...
<p>It looks like a cheap zoom for full frame. 5D3 low end kit lens?</p>
...

But does it make any mention of IQ? No.

I see a lot of replies in this thread about how IQ will be poor, etc.

Humbug.

There's no way to ascertain what the IQ will be just by looking at a patent.

The only curious parts to this patent are the lack of USM in the tag. I don't know if that's just an oversight or there really is no mention of USM as the focus mechanism in the patent (seems highly unlikely.) If it really has no USM, then I can see it being cheap but...

The 28-135 is still shipped in packages for the 7D, etc, right? (it is a 45-216 there)
This 24-105 would be a 38-168 on such cameras. Not quite as useless.

I can't imagine that the IQ could be any worse than the 28-135.