An optical formula patent application for an 8-15mm fisheye zoom lens has appeared at the USPTO.
The patent covers both the APS-C (EF-M) and full-frame (RF) mirrorless mounts as the backfocus for each embodiment is well shorter than the EF's 44mm.
APS-C embodiment:
Focal length: 5.30mm – 9.51mm
F-number: 3.50 3.50
Angle of view: 181.00° 182.00°
Image height: 7.50mm 13.50mm
Total lens length: 77.28mm – 69.52mm
BF: 11.09mm 16.77mm
Full-frame embodiment:
Focal length: 8.01mm 15.30mm
F-number: 3.78 4.60
Angle of view: 177.30° – 183.10°
Image height: 11.15mm 21.64mm
Total lens length: 105.23mm – 103.57mm
BF: 12.00mm 28.46mm
Some of our articles may include affiliate links. If you purchase through these links, we may earn an affiliate commission at no extra cost to you.
This means the RF lens would be about 2 cm shorter on EOS R bodies (103.57 mm -20 mm=83.57 mm, same length, but w/o 20 mm adapter).
Impressing.
For now, releasing those zooms and two versions of the 85/1.2 should keep them busy for now, and I think a pricey but sharp RF 100-400/3.5-5.6L IS zoom would sell well and make some profit for them as well.
It is not only nice to have a native RF lens it will be also interesting, what the different optical formula (still 2 cm shorter) will deliver.
Interesting times.