Canon Patent Application: Ultra Wide Zooms

[Canon Rumors Guy]

I think it’s pretty safe to say that Canon has all the ultra wide zoom lenses that they could possibly need, but we also have to keep in mind that once the dust settles and the lens start production, they are hard at work on the Mark II variant of the lens. While we can

See full article...

 

[DhlcadR6]

15-35L is one of those lens that raised the stereotype that RF is big and bulky.

Challenge Sony's 16-35 GM2, Canon did it RF135L and 10-20L. We love gear wars

 

[EricN]

6 years go by fast...

 

[mxwphoto]

Is stretching the corners and full electronic control the future? I am a bit concerned for longevity of such lenses. We have vintage lenses from 60 years ago that still can work well on current cameras because optics are solid and is mechanically coupled. What about these electronic lenses with digital stretching, especially when the control algorithm is proprietary?

 

[Richard CR]

Is stretching the corners and full electronic control the future? I am a bit concerned for longevity of such lenses. We have vintage lenses from 60 years ago that still can work well on current cameras because optics are solid and is mechanically coupled. What about these electronic lenses with digital stretching, especially when the control algorithm is proprietary?

you can always fix the image in post. full electronic control though is a much harder thing to work around. But I've seen some people adapt Contax electronic mount lenses to EF .. so there's always a way.

 

[Richard CR]

6 years go by fast...

it does! I was a little surprised when I looked it up.

 

[Maximilian]

it does! I was a little surprised when I looked it up.

Me, too, when I read that in the post.

 

[Maximilian]

15-35L is one of those lens that raised the stereotype that RF is big and bulky.

Minimum lens length 144.35 mm - 20 mm Flange = 124.35 mm
"Old" 15-35L: 126.8 mm

==> almost same length. So Size was not the reason for this patent.

 

[DhlcadR6]

Minimum lens length 144.35 mm - 20 mm Flange = 124.35 mm
"Old" 15-35L: 126.8 mm

==> almost same length. So Size was not the reason for this patent.

If it’s same length but internal zoom will be a upgrade

 

[Maximilian]

If it’s same length but internal zoom will be a upgrade

Where do you read internal zoom?
I read

Lens length 154.50 144.35 145.20

So the lens formula differs by about 1 cm, depending on FL.
Will interesting if and how this can be implemented as internal zoom.

And if so, the lens will be about 1 cm larger, than the old one.

Edit: I did also check the other two formulae. They have less differing lengths, still several mm.
So no constant length, and no fully internal zoom.

 

[koenkooi]

Where do you read internal zoom?
I read

So the lens formula differs by about 1 cm, depending on FL.
Will interesting if and how this can be implemented as internal zoom.

And if so, the lens will be about 1 cm larger, than the old one.

Edit: I did also check the other two formulae. They have less differing lengths, still several mm.
So no constant length, and no fully internal zoom.

It could be like the EF17-40L, that pretends to be internal zooming, but the front element moves a few mm.

 

[DhlcadR6]

It could be like the EF17-40L, that pretends to be internal zooming, but the front element moves a few mm.

Or the EF 20-35L