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Author Topic: Patent - EF-S 18-300 f/3.5-5.6  (Read 6862 times)

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Patent - EF-S 18-300 f/3.5-5.6
« on: September 30, 2013, 04:59:32 AM »

A new superzoom

As we mentioned a while back, Canon is working on an EF-S 18-300 f/3.5.5.6 IS STM to replace the no-so-good EF-S 18-200 IS.


The 18-300 appears to be closer to happening as a patent has shown up showing the optical formula in practice.


18300

Canon EF-S 18-300 f/3.5-5.6


Source: [EG]


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Patent - EF-S 18-300 f/3.5-5.6
« on: September 30, 2013, 04:59:32 AM »

Ellen Schmidtee

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #1 on: September 30, 2013, 05:31:42 AM »
Is a 16.67x zoom really going to be that much better, IQ wise, from the EF-S 18-200mm IS?

My guess it's an attempt to compete with the Tamron 18-270mm (some stores in Israel sell pair it with Canon bodies as a kit), so I expect IQ to take the back seat to the focal range. Having the extra STM, 1/3 extra stop + 30mm at the long end, and the Canon brand name would help selling it even if IQ is about as good as the Tamron's.

Don Haines

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #2 on: September 30, 2013, 06:12:03 AM »
The F5.6 will allow AF on all the Canon bodies, and considering it will zoom to 300mm, it will probably be a lot wider and heavier than the 18-200....

Personally, I doubt that the IQ will be anything to write home about.... A 16X zoom range is hard to make decent, most great zooms are 3X or less.... But it would serve as a one lens solution for the masses and would probably sell quite well. Most people don't realize how much better lenses like the 70-200's are than the kit lenses, we fanatics and gear-heads are in the minority.
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WoodyWindy

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #3 on: September 30, 2013, 06:43:09 AM »
As with all of these, we'll have to wait and see just what the lens is capable of. Canon has set the bar pretty high with the new kit STM lenses.

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. Then again, this could be shifted upscale from the 18-200, and less of a compromise image-wise, too.

I'll choose "cautiously optimistic" at this point.

Lichtgestalt

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #4 on: September 30, 2013, 06:57:21 AM »
could be a nice travel zoom.

i was never interested in canons "travel" zooms but the 300mm end could make it attractive for me. when the price is right.

Ellen Schmidtee

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #5 on: September 30, 2013, 08:06:52 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.

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #6 on: September 30, 2013, 08:35:32 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.

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. ;)

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #6 on: September 30, 2013, 08:35:32 AM »

ajfotofilmagem

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #7 on: September 30, 2013, 08:43:18 AM »
By drawing seems to have 21 optical elements. :o Who will carry this weight? :( It would be useful to have a good quality 18-200 STM. 8)

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #8 on: September 30, 2013, 09:09:25 AM »
Another option I would consider is an EF-S 85-300mm F4-5.6 IS STM. With light weight and price down to $ 350 would be a perfect match for 15-85mm, and I would buy.
« Last Edit: September 30, 2013, 09:45:24 AM by ajfotofilmagem »

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #9 on: September 30, 2013, 10:06:08 AM »
The F5.6 will allow AF on all the Canon bodies, and considering it will zoom to 300mm, it will probably be a lot wider and heavier than the 18-200....

Personally, I doubt that the IQ will be anything to write home about.... A 16X zoom range is hard to make decent, most great zooms are 3X or less.... But it would serve as a one lens solution for the masses and would probably sell quite well. Most people don't realize how much better lenses like the 70-200's are than the kit lenses, we fanatics and gear-heads are in the minority.

I agree with most of your points, save the first one.  Even through the Tamron has a maximum aperture of f/6.3 on the tele end, it actually doesn't cause an AF issue with any Canon bodies because it's maximum aperture on the wide end is something like f/3.5.  I used the Tamron at one point for a while and it did AF just fine.
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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #10 on: September 30, 2013, 10:18:25 AM »
Most people don't realize how much better lenses like the 70-200's are than the kit lenses, we fanatics and gear-heads are in the minority.
when I was in the market for a 70-200, f2.8L,  either one,  someone tried to convince me that the 18-200  is all the lens I would ever need  and any improvement in image quality wasn't  noticeable in real world application and certainly didn't justify the price. 

I  just wanted to shake him.   But he was so adamant...
« Last Edit: September 30, 2013, 10:26:57 AM by jdramirez »
Upgrade  path.->means the former was sold for the latter.

XS->60D->5d Mkiii:18-55->24-105L:75-300->55-250->70-300->70-200 f4L USM->70-200 f/2.8L USM->70-200 f/2.8L IS Mkii:50 f/1.8->50 f/1.4->100L->85mm f/1.8 USM-> 8mm ->100L & 85L

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #11 on: September 30, 2013, 10:28:36 AM »
Another option I would consider is an EF-S 85-300mm F4-5.6 IS STM. With light weight and price down to $ 350 would be a perfect match for 15-85mm, and I would buy.

 why would it need to be stm?   wouldn't a usm  motor be just fine?   are many people doing video at 300mm... I  suppose for sports,  but that would still be a challenge.
Upgrade  path.->means the former was sold for the latter.

XS->60D->5d Mkiii:18-55->24-105L:75-300->55-250->70-300->70-200 f4L USM->70-200 f/2.8L USM->70-200 f/2.8L IS Mkii:50 f/1.8->50 f/1.4->100L->85mm f/1.8 USM-> 8mm ->100L & 85L

neuroanatomist

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #12 on: September 30, 2013, 10:31:51 AM »
why would it need to be stm?   wouldn't a usm  motor be just fine?   are many people doing video at 300mm... I  suppose for sports,  but that would still be a challenge.

It likely won't be USM.  STM is cheaper than micromotor AF, which is why we're seeing it in many new consumer lenses.
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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #12 on: September 30, 2013, 10:31:51 AM »

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #13 on: September 30, 2013, 10:33:31 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.
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Lee Jay

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #14 on: September 30, 2013, 10:48:53 AM »
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.

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Re: Patent - EF-S 18-300 f/3.5-5.6
« Reply #14 on: September 30, 2013, 10:48:53 AM »