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I'm keeping my 400mm DO II. I just won't use it with the 2X extender anymore and will use the RF 200-800mm instead.

I picked mine up from my local camera shop on December 26. We've had cloudy/overcast weather in southern Wisconsin so I don't have notable photos to show yet, but I have a few comments. In terms of specifications and weight, the closest I have is the 400mm DO IS ii + 2X extender. For me, the...

Venus transiting the setting Sun.

I've been happy with the 24-240mm as my travel lens (on an RP). Here are examples across the focal length range, chuckwalla (240mm), Morgan Falls (129mm), Titus Canyon (24mm).

I had a good experience converting my EOS M to IR with LifePixel. I have an RP (not converted), and I think it would be a great converted camera. I think a more important issue is that some lenses have bad artifacts with IR "hotspots." The 22mm M lens seems artifact free and is the one I use the...

The RF 24-105 F4 is a very nice lens that I have used for travel with great results. Also consider the RF 24-240mm which comes very close in quality if you don't need F4.

Desert 5-spot, Death Valley, CA

The more I use this lens, the more I like it. Blue-grey gnatcatcher, Madison, WI.

Blue-grey gnatcatcher, Madison, WI

What is your question? Gear recommendations for backpacking or international travel? Strategies to get top level , heavy, bulky gear to remote places, or something else?

First, I agree with the comments that you can print great large prints from 20 megapixels. Second, I have an R5 and I love it (but I do shoot birds and do a lot of cropping). Third, I have experimented with the AI upscale filters and have been impressed. I'll share one example taken with my...

Neuro, can you post a photo that shows how much of the Commlite adapter was removed?

Thank you neuro! This is great information.

Cooper's hawk with prey, R5 + EF 100-400 ii + 2X iii, 1/1000 sec, F11, iso 1600.

Bald Eagle and Gull on the ice in Madison.

Snowy Owl near Madison, WI. 5Ds R + 400mm DO ii + 1.4X extender iii.

In a spot check of half a dozen EF and RF mount camera body specs at Canon USA, all of the bodies listed an "operating environment" of 32-104F. That being said I have had no problems using my cameras below 32F in Wisconsin. I do own the RF 24-240, but I don't think I've used it in temperatures...

To the point about depth of field and needing a narrower aperture, here is a duck photo at 600mm, f11, 1/1000, iso 2500 and the tail is still slightly out of focus.

I partially reproduced what you describe with my R5. My R5 had not been powered on for a few days. I removed the lens before I turned on my R5 and got noise and vibration similar to what you describe. After reattaching the lens, powering the camera on and off (with sensor cleaning on power down)...

A couple of points: First, if you use the EF-S 55-250mm f/4-5.6 IS STM on an R-series camera, you are forced to use crop mode which greatly limits the available resolution. Second, I have compared the EF-S 55-250mm f/4-5.6 IS STM used on an SL1 to the RF 100-400mm used on an RP and the image...