A patent application showing the optical formula for an EF 10mm f/2.8 prime lens has been filed in Japan.
It looks like this patent may have been a part of the EF 11-24mm f/4L USM development.
But this one could be used with the ND filter adapter.
www.canonrumors.com
But it also goes to reinforce the fact that Canon are still progressing with ef lenses....it's not an Rf revolution....but the two formats living alongside each other. I think i would prefer a 10mm f2.8 prime than a 11-24mm f4 zoom. Especially if it was substantially smaller and lighter.
If anything, the front lens looks even a bit bigger on this one, probably not too different in terms of size or weight, it lets in twice as much as light after all with an even wider field-of-view. With the possibility of using a big rear element and bending light rays differently, a substantial reduction in size can be achieved with the RF mount.
I doubt we'll ever see this lens. When Canon decides to make a lens, we sometimes see the lens before the patent, not three years after.
You really don't under stand what a patent is do you....patents always come first. Production never comes before a patent.
Here comes the usual Rf mantra and regurgitation of recently learned information....done a lot of lens design have you? This patent is for an EF lens not an Rf lens. It is an indication that Canon are sill designing and applying for patents for their EF lens designs. It means that they are still applying R&D budget to the EF format. If Canon feels that they have developed something new...they will protect their "device" by applying for a patent.
It's more than that, it is the patent of the optical formula of the EF 11-24mm f/4L USM.
Ahem!... See above.
You really don’t understand how a patent works, do you? A patent will be filed before a product is launched, but the patent doesn’t publish until 18 months after it is filed.
You've made a rubbish remark about wishing it was be smaller and lighter without looking at what it actually is, I responded that if that is what you wish, it probably makes more sense for them to shrink it for the RF mount since it has its advantages, but whatever, I am sure they will make it just for you
