The Canon RF 100-400mm f5.6-Eight is a low-cost telephoto zoom for the full-frame EOS R mirrorless system that’s aimed toward sports activities and wildlife. Introduced in September 2021 alongside the RF 16mm f2.8, the RF 100-400 prices round $649 or 699 kilos and I had a quick likelihood to deal with a pre-production mannequin, though not but shoot with it, so I’ll hold this quick.

First issues first, the RF 100-400 is just not the mirrorless model of the high-end EF 100-400. It’s a smaller, lighter and optically dimmer mannequin aimed toward decrease budgets – extra just like the EF 70-300mm USM in model. Canon’s high-end mirrorless telephoto zoom is the RF 100-500mm, and I’ve a full evaluate of that in case you’re .

The brand new RF 100-400 weighs 635g and measures 80x165mm. There’s a customisable RF management ring, easy handbook focusing ring, and a broad zoom ring that may be locked on the shortest place. When zoomed to the longest focal size, the barrel extends in a single part by round 76mm. So far as I do know, it’s not weather-sealed, however there’s fast and quiet Nano-USM focusing, optical stabilisation good for five.5 stops or 6 coupled with a physique with IBIS, and a 67mm filter thread. If you would like extra attain, it’s suitable with the 1.4x and 2x RF tele-converters.


For me essentially the most revealing specification of a zoom is the place within the vary the aperture adjustments, and I used to be in a position to measure the figures for the brand new mannequin. So I’ve made this beautiful chart for you displaying the aperture adjustments for the outdated EF 100-400mm f4.5-5.6 on the high, the brand new RF 100-400 within the center, and the RF 100-500 f4.5-7.1L on the backside. The brand new RF 100-400 begins at f5.6 and dims to f6.three at 113mm, then to f7.1 at 156mm, then to its minimal f8 from 259mm to 400mm. So throughout this final part, it’s a cease slower than at 100-112mm. 

This makes the brand new RF zoom dimmer than the 2 L fashions, however it’s additionally significantly smaller, lighter and cheaper- in truth roughly one third the value of the EF 100-400 L and one quarter the value of the RF 100-500 L, so clearly it’s a totally completely different proposition. Whereas it lacks their glamour, I’m happy Canon’s additionally producing quite a lot of extra inexpensive native RF lenses and sit up for testing it. I’ll hyperlink to my full evaluate right here as soon as it’s prepared, however within the meantime, try my evaluations of the opposite RF lenses together with my preview of the brand new 16. Thanks for watching and see you once more quickly!

Examine costs on the Canon RF 100-400mm USM at B&H, Adorama, WEX UK or Alternatively get your self a replica of my In Digicam guide or deal with me to a espresso! Thanks!

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