Patent: Canon 100-400mm f/5.6-7.1

[melgross]

7.1 is the new 6.3.

 

[TMACIOSZEK]

I'm sure Canon has a perfectly good reason for these lenses ending in f/7.1... but it's a mystery to me.

 

[TMACIOSZEK]

View attachment 188838

That there's funny, I don't care who you are.

 

[Iskandar]

I would absolutely buy a native 100-400 on an EF-M Mount. This is the biggest thing I think the M cameras are missing - a lightweight long tele. I am fine with 7.1 if it means it’s small to carry on hikes.

 

[Sharlin]

I'm sure Canon has a perfectly good reason for these lenses ending in f/7.1... but it's a mystery to me.

The reason is: because it's possible. Now that there's no artificial f/5.6 restriction to AF anymore.

 

[Deleted member 7828]

The only way this makes sense, IMO, is as an M lens. It would be nice, actually, to have the option of a native EF-M lens with more than 200mm of reach, even if that means f7.1 at the long end to keep it compact. Whatever.

Personally I think I’d rather hold out for a 600mm FF lens, though. Shots taken back in the day with my 7D left me wanting in terms of detail, etc...

 

[Roy Hunte]

I'm sure Canon has a perfectly good reason for these lenses ending in f/7.1... but it's a mystery to me.

According to camera conspiracies it's called the Canon cripple hammer.

 

[koenkooi]

The reason is: because it's possible. Now that there's no artificial f/5.6 restriction to AF anymore.

The new restriction is that DLA starts happening around f/5.1 on the M6II. But DLA is not a cliff, so f/7.1 could very well be 'good enough'.

 

[Pape]

The new restriction is that DLA starts happening around f/5.1 on the M6II. But DLA is not a cliff, so f/7.1 could very well be 'good enough'.

yeah i think all phone cameras go 2 stop under DLA straight to verge of cliff

 

[Pape]

I think they seriously try now make super sharp M lense ,lack of IS hints it.
Now we see what is possible when no need protect 1 serie and big whites

 

[Dragon]

oh woah could be amazin birdler lense for M cameras . Sharpest supertele ever made if made well?
Thank you canon confusing me even more about what to do next
So M5ii must be coming , and M barrel diameter isnt unbreakable law.
There isnt IS so M5ii got ibis?
Guys i would love to see your face if next M camera would be M1 would make some :O
It even makes sense ,camera for professional bird shooters

Given the layout, I think this will fit into the standard 61mm M series barrel diameter. If not, it will come very close. Take this, the 18-150, and the 11-22 and you have 17.6-576mm equivalent in a very small package with good to excellent IQ. I think M is here to stay for quite a while.

 

[sulla]

Why are lenses for the EOS M restricted to 61mm diameter? As long as the rear diameter of the lens elements fits the bayonett, can't the front diameter be whatever it takes?

 

[sulla]

I would't consider a 120-360mm lens a "100-400". That stretches the concept of rounding a bit toooo much for my taste.

 

[koenkooi]

Why are lenses for the EOS M restricted to 61mm diameter? As long as the rear diameter of the lens elements fits the bayonett, can't the front diameter be whatever it takes?

We can only guess to why, but Canon seems to really stick to that self-imposed restriction.

 

[Cat_Interceptor]

Ugh. So Canon lets it's engineers off the chain for camera bodies and the cripple hammer attack the lenses instead.

No sorry but 7.1 is just one big fat noooooooooooooooooooooooope

 

[TMACIOSZEK]

Ugh. So Canon lets it's engineers off the chain for camera bodies and the cripple hammer attack the lenses instead.

No sorry but 7.1 is just one big fat noooooooooooooooooooooooope

They've developed the very fast (RF f/1.2) and very slow (RF f/7.1)... perhaps they have a happy middle in store for us next?

 

[AlanF]

yeah i think all phone cameras go 2 stop under DLA straight to verge of cliff

The DLA for a new iPhone is about f/2.4 and the various lenses vary from f/1.8 for the main to f/2.4 for the wide angle. The advantage of these very short focal lenses is that it is easy to get wide f-numbers to compensate for the small pixels of about 1.4 microns.

 

[Sharlin]

Ugh. So Canon lets it's engineers off the chain for camera bodies and the cripple hammer attack the lenses instead.

Your comment is hardly worth replying to, but most likely it’s the exact opposite to what you think: the disappearance of the f/5.6 limitation lets engineers explore more of the space of plausible lens designs.

 

[dwarven]

So the "this new RF mount will allow some wild new lens designs, we can't wait to see what's in store" hype became "just get an adapter and use older glass".

 

[SecureGSM]

Now what? 85 5.6?

500/F8. I have one of these from my film days sitting in my closet