Patent: Dual internal teleconverter telephoto lens.

mb66energy · May 13, 2019

Would be a funny being! But after taking some time to look at it: A very interesting idea if you look how well the converters work with different lenses - two integrated (in terms of optical design) integrated adapters might be a three-focal-length lens with the excellent IQ of the best primes ... in one package.

thomas2279@hotmail.com · May 13, 2019

Good innovation Canon and despite any Sony Home bouys tell themselves Canon nor Nikon are finished in the photography business

snoke · May 13, 2019

What T-stops for lens?

snoke · May 13, 2019

This first patent lens.
Second patent lens:

500/f4
700/f5.6
360/f2.8

DragosP · May 13, 2019

What I would like to see, is something similar to Nikon 500mm f/5.6E PF....

awair · May 13, 2019

I would have “settled” for a 400/2.8 with 1.4x builtin, as a replacement for my 400 mk II. The 200-400 is too slow for some of the events I cover.

If a reducer could be added, enabling 280(?) f/2, that would be absolutely mind-blowing!

$20k or thereabouts, but worth every penny...

3serious · May 13, 2019

This multi-converter lens is cool and all, but I'd much rather see something like a sub-$10k 600mm f/5.6 for us enthusiast mortals who live down here on Earth, and don't want a zoom sigma 150-600 f/6.3

AlanF · May 13, 2019

3serious said:
This multi-converter lens is cool and all, but I'd much rather see something like a sub-$10k 600mm f/5.6 for us enthusiast mortals who live down here on Earth, and don't want a zoom sigma 150-600 f/6.3

A sub $4k 500mm f/5.6 would be my preferred choice for two reasons. First, weight and secondly wider field of view, and 500mm would help keep the price down.

unfocused · May 13, 2019

Not sure I get the point of this lens. Same focal length and aperture as the 100-400 which takes a 1.4 converter very nicely. I suppose a fixed focal length and matched teleconverter might be marginally sharper, but not sure it would be visibly sharper in real world use. Such a lens might be lighter than the zoom, but it would also be longer. Too long to fit in my camera bag. It would make more sense if this were an R lens. Shorter, lighter, maybe faster focus and something different to excite people.

vangelismm · May 13, 2019

Ok, just give me 50mm that becomes 70mm and 35mm.

3serious · May 13, 2019

vangelismm said:
Ok, just give me 50mm that becomes 70mm and 35mm.

24-70 2.8 yo

mb66energy · May 13, 2019

vangelismm said:
Ok, just give me 50mm that becomes 70mm and 35mm.

1.8 35 - 1.4 50 - 2.0 70 incl. 1:3 Macro @70mm ...

vangelismm · May 13, 2019

3serious said:
24-70 2.8 yo

No.

mb66energy said:
1.8 35 - 1.4 50 - 2.0 70 incl. 1:3 Macro @70mm ...

Yes.

SwissFrank · May 14, 2019

I think this is a "just for the record we tried this" kind of patent.

There's no IS, and I'm led to believe IBIS isn't as good as in-lens IS for long teles.

And why do this instead of an actual zoom? Image quality, but the spherical aberration with TC B is bad and astigmatic. Not sure if better than a zoom, but at least this is no panacea.

A little related is that Leica tele's for their old SLR camera had interchangeable front "halfs" and back "halfs" you could mix and match for different focal lengths. I wonder how that worked, image quality-wise, compared to these solutions.

SwissFrank · May 14, 2019

mb66energy said:
1.8 35 - 1.4 50 - 2.0 70 incl. 1:3 Macro @70mm ...

You remember how old TV cameras (1950s?) had three lenses on a rotating mount? Given the RF's short film-to-flange you could probably make something like that that could mount 3 EF lenses.

Leica's rangefinders also had a "Tri-Elmar" lens with three fixed focal lengths. I've used M for decades but literally have never touched the Tri-Elmars. I don't know if they're actually zooms that just have three zoom settings, or whether the image isn't really usabable between the specific focal lengths.

RunAndGun · May 14, 2019

Kinda like these that we had in the days of 16x9/4x3 switchable TV cameras. Most of our ENG lenses had a built-in 2x extender, but for a while they added the option of adding in a .7x(I believe) element to maintain the FoV when the camera was switched from 16x9 to 4X3(the sides of the chips were just electronically cropped).

RunAndGun · May 14, 2019

SwissFrank said:
You remember how old TV cameras (1950s?) had three lenses on a rotating mount? Given the RF's short film-to-flange you could probably make something like that that could mount 3 EF lenses.

Leica's rangefinders also had a "Tri-Elmar" lens with three fixed focal lengths. I've used M for decades but literally have never touched the Tri-Elmars. I don't know if they're actually zooms that just have three zoom settings, or whether the image isn't really usabable between the specific focal lengths.

https://www.newsshooter.com/2019/04/10/multi-turret-old-school-meets-new-school/

Pixel · May 14, 2019

I take it, this is the ”crazy” lens mentioned a couple weeks ago?

goldenhusky · May 14, 2019

Canon rocks with lenses!!! imagine if Canon makes lenses for Sony and Nikon we will have best of all worlds. Best Sensor Tech (Sony), Best weather sealing and ergonomics (Nikon&Canon), Fantastic Lenses (Canon)