Big white lenses for the RF mount are a logical next step for Canon, and I was expecting to see at least a couple of them announced ahead of the Tokyo games this year, but that appears to still be in a certain level of flux, so who knows at this point?
Outside of an RF 300mm f/2.8L IS USM, all of the optical formulas that appear in this USPTO patent uncovered by Northlight Images are also part of the rumoured RF lens roadmap that I published a while ago.
Another of the rumoured lenses on our roadmap is an RF 1200mm f/8L IS USM, but I haven't seen any sort of patent reference for such an optical formula yet.
| Canon RF 300mm f/2.8L IS USM | |
| Focal Length | 292.50mm |
| F-Number | 2.91 |
| Half Angle of View | 4.23° |
| Image Height | 21.64mm |
| Total Lens Length | 274.19mm |
| Backfocus | 52.99mm |
| Canon RF 400mm f/2.8L IS USM | |
| Focal Length | 390.15mm |
| F-Number | 2.91 |
| Half Angle of View | 3.17° |
| Image Height | 21.64mm |
| Total Lens Length | 371.16mm |
| Backfocus | 54.90mm |
| Canon RF 500mm f/4L IS USM | |
| Focal Length | 489.84mm |
| F-Number | 4.12 |
| Half Angle of View | 2.53° |
| Image Height | 21.64mm |
| Total Lens Length | 385.02mm |
| Backfocus | 55.61mm |
| Canon RF 600mm f/4L IS USM | |
| Focal Length | 584.72mm |
| F-Number | 4.12 |
| Half Angle of View | 2.12° |
| Image Height | 21.64mm |
| Total Lens Length | 452.08mm |
| Backfocus | 55.69mm |
| Canon RF 800mm f/5.6L IS USM | |
| Focal Length | 789.82mm |
| F-Number | 5.88 |
| Half Angle of View | 1.57° |
| Image Height | 21.64mm |
| Total Lens Length | 489.04mm |
| Backfocus | 82.90mm |
Da dum, Da dum, Da dum da dum da dum da dum ...
I think we're going to need a "bigger camera! " :ROFLMAO:
I'm guessing that the design for telephoto lenses stays pretty similar except that they basically have a built in RF adapter to bridge the extra backfocus, but I'm sure there's not much Canon can do about that in those designs
Of course if someone starts from scratch that is a different story.
I would be very interested to know if Canon will make a whole new lens for the 600mm on the RF mount, or will adapt the EF design for RF uses in some way.
I assume Canon has been eyeing making the big whites DO like in their sample DO 600mm F/4, which looked amazing, but it seems like that has taken awhile.
Another interesting thought--I know the F/11 lenses are consumer based, but what if Canon make the 500mm F/4, for example, collapsible as well? I see no reason they couldn't make a super sturdy geared mechanism for that.
Reducing the price... and the minimum focus distance!! more in the direction of zoom lenses please... not over 3m! <3m would be fine to me!
To have a solid line-up Canon needs a great combination of bright (2.8/4.0) and more mobile/flexible lenses (4.0/5.6 & ZOOOMS!)
EDIT: But some of these can be achieved by ... cheating on f/sise: Let's say a 600 f/5.6 DO or a 800 f/8 or ...
Leica APO-Telyt-R Module 280 / 400 / 560 / 800 mm
You still have a wallet? :D
That's not the question, you will.
Will you have to abduct someone off the street (or cannibalize a relative) to sell their kidneys as well? That's the real question.