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Author Topic: Patent - EF-S 18-300 f/3.5-5.6  (Read 5373 times)

TWI by Dustin Abbott

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #15 on: September 30, 2013, 10:50:11 AM »
Canon demonstrated with the 55-250 EF-S that they can make a sharp, inexpensive zoom lens. If an 18-300 EF-S could have similar sharpness it would be quite an incredible lens.

Unfortunately, it seems like getting that sharpness in a lens that goes from wide to telephoto is a lot harder than getting it from normal to telephoto.

+1.  That is the basic problem there.  The optical compromises to accommodate both ends of the spectrum are, I suspect, near impossible to overcome.  The best example I am aware of in the EF-S line is the 15-85mm, an excellent lens, but a 5x zoom ratio is far from the 16+ proposed here.
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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #15 on: September 30, 2013, 10:50:11 AM »

Ellen Schmidtee

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #16 on: September 30, 2013, 12:13:03 PM »
There could be design optimizations for video (e.g. parfocal behavior) that give it a major leg up, even if its pixel-level sharpness isn't quite tip-top.

I know Canon often introduces new features in lower-end products, e.g. dual pixel AF in the 650D then 70D, but I doubt the first parfocal lens would be a low end super zoom.


Which touches my other point - the assumption is that this is a low-end zoom. Let's not forget that Canon introduced a 28-300 L - a range that was typically dismissed as "tourist class"... This lens could be a shocker in any number of ways...or not. ;)

According to rumor, it's intended "to replace the no-so-good EF-S 18-200 IS". I don't see Canon replacing a low end lens with a high end one.

joshmurrah

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #17 on: September 30, 2013, 12:29:38 PM »
Interesting to see Canon finally develop this range.

I've long recommended a rebel and a Tamron 18-270 VC, to anyone who's asked me about starting with an dSLR... I rocked that combo for a few years, including Yellowstone and a Blue Angels airshow, and it was a fantastic combo, with no lens swapping decisions to make.
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ajfotofilmagem

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #18 on: September 30, 2013, 01:18:30 PM »
I'd trade 100mm on the long end for 3mm on the wide end - 15-200.  I can't believe the only 15mm-xxx zoom is still the 15-85IS.  All these 17-xx and 18-xx zooms for the EF-s mount are stupid, frankly.  And, yes, that includes the 17-55/2.8 and all the third-party lenses.  Even my Canon compacts all start at 24mm or 25mm equivalent, not 27mm or 29mm.
I've given up dreaming with a 15-200mm lens with good image quality. Judging by the current 15-85mm, a hypothetical 15-200mm cost well over $ 1000 and weigh at least 1 kg. Actually I wish very much a 15-55mm F2.8 IS. ::)

9VIII

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #19 on: September 30, 2013, 03:27:01 PM »
Canon demonstrated with the 55-250 EF-S that they can make a sharp, inexpensive zoom lens. If an 18-300 EF-S could have similar sharpness it would be quite an incredible lens.

Unfortunately, it seems like getting that sharpness in a lens that goes from wide to telephoto is a lot harder than getting it from normal to telephoto.

+1.  That is the basic problem there.  The optical compromises to accommodate both ends of the spectrum are, I suspect, near impossible to overcome.  The best example I am aware of in the EF-S line is the 15-85mm, an excellent lens, but a 5x zoom ratio is far from the 16+ proposed here.

One can only hope they try to make one in EF-M. 18-300mm with an entirely telephoto design should be both lighter and sharper.

(Now if only someone could be bothered to make a full frame 40-200 zoom.)
« Last Edit: September 30, 2013, 03:31:53 PM by 9VIII »
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verysimplejason

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #20 on: September 30, 2013, 10:35:51 PM »
I'd trade 100mm on the long end for 3mm on the wide end - 15-200.  I can't believe the only 15mm-xxx zoom is still the 15-85IS.  All these 17-xx and 18-xx zooms for the EF-s mount are stupid, frankly.  And, yes, that includes the 17-55/2.8 and all the third-party lenses.  Even my Canon compacts all start at 24mm or 25mm equivalent, not 27mm or 29mm.

+1 but I want the extra 50mm on the long end.  15-250 sounds about right.

verysimplejason

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #21 on: September 30, 2013, 10:37:32 PM »
There could be design optimizations for video (e.g. parfocal behavior) that give it a major leg up, even if its pixel-level sharpness isn't quite tip-top.

I know Canon often introduces new features in lower-end products, e.g. dual pixel AF in the 650D then 70D, but I doubt the first parfocal lens would be a low end super zoom.

You


Which touches my other point - the assumption is that this is a low-end zoom. Let's not forget that Canon introduced a 28-300 L - a range that was typically dismissed as "tourist class"... This lens could be a shocker in any number of ways...or not. ;)

According to rumor, it's intended "to replace the no-so-good EF-S 18-200 IS". I don't see Canon replacing a low end lens with a high end one.

You did already.  18-135 STM IS is much better than the previous 18-135 IS.  Even the 18-55 STM IS is much better than the 18-55 IS II.

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #21 on: September 30, 2013, 10:37:32 PM »

Ellen Schmidtee

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #22 on: October 01, 2013, 01:25:09 AM »
There could be design optimizations for video (e.g. parfocal behavior) that give it a major leg up, even if its pixel-level sharpness isn't quite tip-top.

I know Canon often introduces new features in lower-end products, e.g. dual pixel AF in the 650D then 70D, but I doubt the first parfocal lens would be a low end super zoom.

You


Which touches my other point - the assumption is that this is a low-end zoom. Let's not forget that Canon introduced a 28-300 L - a range that was typically dismissed as "tourist class"... This lens could be a shocker in any number of ways...or not. ;)

According to rumor, it's intended "to replace the no-so-good EF-S 18-200 IS". I don't see Canon replacing a low end lens with a high end one.

You did already.  18-135 STM IS is much better than the previous 18-135 IS.  Even the 18-55 STM IS is much better than the 18-55 IS II.

Those lenses being better than their predecessors doesn't make them high end.

Furthermore, both lenses kept the same focal lengths range, which makes it easier to improve IQ.
« Last Edit: October 01, 2013, 07:49:17 AM by Ellen Schmidtee »

preppyak

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #23 on: October 01, 2013, 11:44:21 AM »
I know Canon often introduces new features in lower-end products, e.g. dual pixel AF in the 650D then 70D, but I doubt the first parfocal lens would be a low end super zoom.
Cant see them making it parfocal, simply because of the thin margin of error to make that work. It usually makes the lens a lot bulkier and heavier. And raises the price

Which touches my other point - the assumption is that this is a low-end zoom. Let's not forget that Canon introduced a 28-300 L - a range that was typically dismissed as "tourist class".
The EF-S is what makes it a low-end zoom. Even the 17-55 isn't an expensive lens, by L standards. Can't imagine they are gonna drop a $1500+ super zoom that only works with APS-C cameras

Don Haines

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #24 on: October 02, 2013, 11:34:58 PM »
You have to look at the intended market. Super zooms are not about image quality, they are about convenience. This lens will probably cost slightly more than the 18 200... The image quality will probably be about the same. It will sell well.

The best camera is the one in your hands

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #24 on: October 02, 2013, 11:34:58 PM »