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Rf800 F11 on the R7

Started 2 months ago | User reviews thread
OP Distinctly Average Senior Member • Posts: 2,527
Re: Rf800 F11 on the R7
2

John Sheehy wrote:

Steve Fink wrote:

Nice shots!

I certainly could've used an 800mm for shots of red headed ducks on our lake. I used my RF 600mm F11 but didn't quite have the reach.

Other than distance shots, I'm not so sure I'd get my monies worth for it. I already find the RF 600mm F11 to be too much for some of my shots and BIF shots I agree might be a huge challenge with an 800mm lens.

I also am concerned about the extend retract feature of the lens. I had a push/pull EF zoom that collected a lot of dust instead that I couldn't clean. I don't know if this lens would eventually have the same problem.

You don't ever have to retract the lens. Just extend it once out of the box, and leave it that way forever. The police will NOT bother you, I guarantee!

I don't know how much air resistance there is with the rear cap on, but you can take it off and then extend/retract the lens, and then it can't change the air pressure inside the lens. It's not like the original EF100-400 where there is glass at both ends.

The mechanism, whether it is push pull or twist, any extending lens has to displace air. People often state the EF100-400II is better than the MK1 for sucking dust in and blame it on the push-pull element. But both lenses displace a similar amount of air, it is just filtered better on the MK2

I hope that with these RF lenses thinks have improved since the 20+ years old designs that are still being mentioned and are often still in use. Quite a testament to how good we have it.

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