Canon 18-45 f/3.5-5.6 Kit Lens for APS-C Mirrorless Patent

[c.d.embrey]

My fear is that Canon will treat their CSC cameras as a step-up from P&S, instead of a step-up from a 7D. With modern technology there is no reason for not building a Pro Quality CSC and Pro Quality Primes.

Please. please. please don't give us Rebel quality CSCs with effing-kit-zoomz

 

[Freshprince08]

My rebel camera with kit zoom is not much heavier than a mirrorless camera, and is already a bit too small for my hands. For me there are two types of cameras: Those who fit in my pocket, and those who don't.
The mirrorlss and the DSLR are both in the second category.
For the first category, I prefer cameras like the Lumix LX3.

Tend to agree with this, especially for guys. If it's big enough to require its own bag then there's not much difference in bringing a DSLR. Pocketable + 50mm equiv pancake lens, however, would be different!

 

[DzPhotography]

I fully agree. Most consumers don't even buy an extra lens for their DSLRs, what makes anything think people will be buying extra lenses for these mirror-less boxes? And, who wants to invest in a completely new set of lenses anyway?

The frustrating thing is this shouldn't be that tough. The Fuji X-10 is about 80% of the way there, and the Canon G1-X is also about 80% there. But, they both seem to have bungled the remaining 20%. Having more interchangeable lenses to invest in isn't a plus in my book. Give me a good viewfinder, decent resolution and a quality 2.8-ish lens that zooms from 28ish-100ish and I'll be there.

+1 I fully agree. A cam like you describe it is on the top of my wishlist. Don't need extra lenses in my compact then

 

[gmrza]

Gimme an EF compatible body and a pancake prime for taking on vacation and I'll be a happy happy man.

I agree, EF compatible body is what I am waiting for in the mirror less camera from Canon, I have seen EF adapters for other mirror less cameras in the market but it would be nice if Canon released one with EF and EFS mount

About this new lens 18-45mm, it would have been nice if they had provided 24 - 70mm instead of 29 to 70mm

In order to be "compatible" with EF lenses, it is necessary to maintain the same distance from the mount to the focal plane as in an EOS (D)SLR. That doesn't help much for compactness - the xx0D range is possibly about as compact as you can get with an EF (well, really EF-S) mount.

Using an adapter to mount an EF (or EF-S) lens is a different discussion. - That is what Sony already does with its Nex cameras.

I believe it is very challenging for a camera manufacturer to build a mirrorless system that is really going to be revolutionary. In order to really compete, EVFs and in-sensor phase-detect AF will need to mature as technologies first. Canon probably also still needs deal with the challenge of how to collect light from a lens that is closer to the focal plane - because current sensors don't collect light which coming from extreme angles very well. - Just think of the ISO-fudging that Canon does with lenses like the 85mm f/1.2L when it is wide open. (I am not sure what patents Leica/Kodak own that may block Canon's progress in this respect.)

 

[dr croubie]

That is the start of the future of APS-C with its gradual move into the consumer arena. Imagine a mirrorless 7D equivalent and then wonder if there is a future for the DSLR 7D as well?

There already is, and it's called the NEX-7.
Sure, it's expensive, but it's there, it's APS-C, it's 24MP, and from what i've read, IQ isn't so bad either.
I love my 7D, but if I could go on a holiday, take one do-it-all-zoom (like EFs 15-85), a wide prime (like zeiss 21 or canon/samyang 14), and maybe a portrait (like my Takumar 50/1.4 is the size of a niftyfifty), I could leave the 7D at home and not worry about the weight.
I'd still keep the 7D, shooting birds on live-view is too hard (although i'm sure i could practise more) but mirrorless is the future for travel.


ps, M9 is MILC but not EVIL. M10 is rumoured to have live-view, then it will be both...

 

[Rocky]

Excuse me for coming off ignorant, but what is with all the hype over mirror-less cameras. I'm serious, what am I missing? I get the part of less mechanical, maybe higher shutter speeds (maybe not), but what about the loss of a "real" viewfinder?

Yes, I know mirror-less have been around on and off for years, but I don't understand what market they're aimed at. Is this to compete with the P&S market, DSLR, market or its own? It seems to me they targeted towards the hip, got-to-have-the-lastest, the in-thing, trendy market.

Please, someone enlighten me. ???

See Leica M9...

not a good example imho. Leica M9 is rangefinder, not mirror-less. And also not affordable for most of the people. I don't understand the hype either, maybe it has to do with less bulky design and still interchangeable lenses. But most mirrorless systems do not have fast enough lenses for my use. Maybe the new Fuji X-Pro 1 will resolve that matter, but it's really expensive again...

M9 is a good example of how good a mirrorless can be.
1. It is the only FF mirrorless.
2. It is the only small sensor (FF, APS-C APS-H included) that does not have an AA filter.
3. It is backward compatable with most lenses that are made by (or for) Leica since 1930's.
4. Fastest lenses (f 0.9 ) available.
5. Fast focus in the hand of the right person with manual focus.

 

[marekjoz]

Excuse me for coming off ignorant, but what is with all the hype over mirror-less cameras. I'm serious, what am I missing? I get the part of less mechanical, maybe higher shutter speeds (maybe not), but what about the loss of a "real" viewfinder?

Yes, I know mirror-less have been around on and off for years, but I don't understand what market they're aimed at. Is this to compete with the P&S market, DSLR, market or its own? It seems to me they targeted towards the hip, got-to-have-the-lastest, the in-thing, trendy market.

Please, someone enlighten me. ???

See Leica M9...

not a good example imho. Leica M9 is rangefinder, not mirror-less. And also not affordable for most of the people. I don't understand the hype either, maybe it has to do with less bulky design and still interchangeable lenses. But most mirrorless systems do not have fast enough lenses for my use. Maybe the new Fuji X-Pro 1 will resolve that matter, but it's really expensive again...

M9 is a good example of how good a mirrorless can be.
1. It is the only FF mirrorless.
2. It is the only small sensor (FF, APS-C APS-H included) that does not have an AA filter.
3. It is backward compatable with most lenses that ar made by (or for) Leica since 1930's.
4. Fastest lenses (f 0.9 ) available.
5. Fast focuse in the hand of the right person with manual focus.

Thank you! This is exactly what I'm talking about!

+1

 

[ghosh9691]

Wow!!! I am surprised that no one picked up on the problems with this rumor!!! Either this rumor is completely bogus, or the specs are incorrect... Assuming that this is an APS-C sensor, then 18mm will be 28.8mm equivalent in 35mm. Now, which 28mm lens has an angle of view of 36 degree? NONE. It will be more like 73 degrees. If we assume that the specs are correct, then to get a 36deg angle of view, the equivalent focal length in 35mm will be 70mm...giving a FOV crop factor of 3.88x - i.e. closer to a 2/3inch sensor.

Back focus distance of 0.5mm: Assuming that the translation is correct, I assume this means flange to focal plane distance. Of 0.5mm??? The back of the lens will sit flush on the sensor in that case. Make it interchangeable, and you will guaranteed damage the sensor when changing lenses

None of this makes any sense. I think our desire for a Canon mirrorless is making us grasp at straws...

 

[lol]

I didn't check, is the angle given half the field of view? Does the other end work out right on that assumption?

Back focus distance is from the rear of the lens, not the mount.

 

[ghosh9691]

I didn't check, is the angle given half the field of view? Does the other end work out right on that assumption?

Back focus distance is from the rear of the lens, not the mount.

Angle of view is generally specified for the diagonal...not in halves.

And a rear of the lens element sitting 1/2 millimeter from the sensor? just imagine the manufacturing tolerances that would be needed to prevent the lens from hitting the sensor...

Sorry, folks are still grasping at straws....wanting their desires to come true! There's nothing wrong with that, but I am still calling this lens posting as bogus...

 

[maxxevv]

18mm for the NEX. Here's a list of ALL lens mounts http://en.wikipedia.org/wiki/Lens_mount

Thanks, I've already seen the table. It addresses the 'flange mount distance' not the 'back focus distance' of the lens since we do not know the flange mount distance of this lens, its moot ....

 

[maxxevv]

Back focus distance of 0.5mm: Assuming that the translation is correct, I assume this means flange to focal plane distance. Of 0.5mm??? The back of the lens will sit flush on the sensor in that case. Make it interchangeable, and you will guaranteed damage the sensor when changing lenses

They are different things. You're mixing them up.

Canon EF Mount has a flange distance of 44mm. But most of its lenses have a 'back focus' of between 35-60mm. See the difference there ?

Get to read a few more of the patents on those new EF lenses and perhaps you'll catch the groove.

 

[ghosh9691]

Back focus distance of 0.5mm: Assuming that the translation is correct, I assume this means flange to focal plane distance. Of 0.5mm??? The back of the lens will sit flush on the sensor in that case. Make it interchangeable, and you will guaranteed damage the sensor when changing lenses

They are different things. You're mixing them up.

Canon EF Mount has a flange distance of 44mm. But most of its lenses have a 'back focus' of between 35-60mm. See the difference there ?

Got read a few more of the patents on those new EF lenses and perhaps you'll catch the groove.

Yes, "back focus distance" is the distance from the rear-most lens element to the film (or sensor) plane. If it is 0.5mm as claimed, it means that the rear most lens element is sitting almost on top of the sensor.

 

[maxxevv]

Yes, "back focus distance" is the distance from the rear-most lens element to the film (or sensor) plane. If it is 0.5mm as claimed, it means that the rear most lens element is sitting almost on top of the sensor.

Yup that's the value .. at least that's what the translation says. Its possible and plausible as minimising the back focus distance is a means to minimising the overall lens package size too. But we never know really as it may indeed be an error somewhere .

Which was why I was asking if anyone has any idea the comparable back focus distances for the Sony NEX or the Leica M system to see if it made real sense.

But 0.5mm is plenty of space really for machine tolerances. Typically, I work in the range of 0.025- 0.05mm clearances for parts of similar size.

 

[ghosh9691]

Yes, "back focus distance" is the distance from the rear-most lens element to the film (or sensor) plane. If it is 0.5mm as claimed, it means that the rear most lens element is sitting almost on top of the sensor.

Yup that's the value .. at least that's what the translation says. Its possible and plausible as minimising the back focus distance is a means to minimising the overall lens package size too. But we never know really as it may indeed be an error somewhere .

Which was why I was asking if anyone has any idea the comparable back focus distances for the Sony NEX or the Leica M system to see if it made real sense.

But 0.5mm is plenty of space really for machine tolerances. Typically, I work in the range of 0.025- 0.05mm clearances for parts of similar size.

For the Leica M, it is 27.8mm. For Sony NEX, it is shorter (that is why an M mount lens can be mounted on the NEX via adapter)...

 

[simonxu11]

非球面 4面=4 ASPH
Canon put 4 ASPH in a kit lens???

 

[dr croubie]

非球面 4面=4 ASPH
Canon put 4 ASPH in a kit lens???

Pentax made the 18-55 kit lens on their K5 waterproof.
Stranger things have happened...

 

[maxxevv]

For the Leica M, it is 27.8mm. For Sony NEX, it is shorter (that is why an M mount lens can be mounted on the NEX via adapter)...

That is the flange mount distance Leica M Bayonet. Not the typical 'back focus' values of Leica M Bayonet lenses. :

Leica M39 screw mount has a different value, which has to be differentiated.

 

[amy123]

well done!

 

[amy123]

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