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    Patent: Optical formulas for Canon RF macro lenses

    By 80 Comments1 Min Read Canon Patents
    patentrfmacro - Patent: Optical formulas for Canon RF macro lenses

    We're obviously going to get an RF L macro lens sooner than later, and Canon News has uncovered another patent showing various optical formulas for such a lens.

    Canon RF 65mm f/2.8

    • Focal length: 65.13mm
    • F number : 2.92
    • Angle of view: 18.38°
    • Image height: 21.64mm
    • Lens length: 135.78mm
    • Backfocus: 21.40mm

    Canon RF 90mm f/2.8 Macro

    • Focal length: 87.04mm
    • F number: 2.92
    • Angle of view: 13.96°
    • Image height: 21.64mm
    • Lens length: 135.86mm
    • Backfocus: 19.58mm

    Canon RF 100mm f/2.8 Macro

    • Focal length: 97.62mm
    • F number: 2.92
    • Angle of view: 12.50°
    • Image height: 21.64mm
    • lens length: 123.21mm
    • Backfocus: 18.86mm

    Canon RF 180mm f/2.8 Macro

    • Focal length: 189.96mm
    • F number: 2.92
    • Angle of view: 6.50°
    • Image height: 21.64mm
    • Lens length: 185.34mm
    • Backfocus: 23.95mm
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    80 comments

    2. Good news. Personally a great 100-ish macro and a pancake would get me onboard onto the RF train. I don't need IS for a macro lens, as I do nearly 100% on a tripod, ymmv. Plus, won't the bodies be stabilized?
    3. Man I hope these come soon, I’d prefer the 100 or 180, and it’d be great if one of them did more than 1:1 mag, I’d love a 1-5x like their manual focuse MP-E 65
    4. Personally I would like to see 180mm f4 IS USM macro over 180mm f2.8 Macro. Sigma already offered similar lens and it was very bulky lens. Now due to shorter flange distance if these lenses offer some additional working distance over their Slr counterparts then I would gladly purchase these lenses along with hypothetical crop sensor based RF camera.
    5. Good news. Personally a great 100-ish macro and a pancake would get me onboard onto the RF train. I don't need IS for a macro lens, as I do nearly 100% on a tripod, ymmv. Plus, won't the bodies be stabilized?

      The 100 macro makes for a great portrait lens too, and that's where a lot of shooters would benefit from IS. Although with the upcoming IBIS, all of this matters less and less...
    8. I wish I could find the quote, I think it was from the CEO of Olympus who said there is a limit of how many stops of stabilization is possible due to forces from the Earth's rotation....anyone?
    10. That 180 macro... Is probably on my bag when it comes

      Will it make a sonic boom flying off the shelf into your bag? If not, well, I just can't take this rhetoric seriously.

      :D:p
    14. Wow, 180mm f/2.8 is very interesting! Hope it will sport IS.
      Also hope the 65mm will be the MP-E counterpart with improved sharpness.
      Switching to R system one day gonna be a budget disaster... :-)
    15. Can I hope and hope that there might just be an updated RF 65mm lens like the MPE-65. From my handheld macro perspective IS isn't much of an issue or want, since at +1x or more I feel that it wouldn't have much effect. Anyone on here use the MPE-65 on a EOSr body?
    18. Well, just wait for better performance. Earth’s rotation is slowing by about 1.7 milliseconds per century. :giggle:

      No wonder the days seem to drag on more as I get older!

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