Canon EXT. RF2X(N) (4114C002)

Works fine with the Canon 200-800 RF. A little slow at 1600mm F18, but perfectly fine in bright sunlight shooting 1/1000th. Sharpness looks good on both the R7 and R5MarkII. Stabilization works but at 1600mm it still has a bit of movement even with stabilization on. A little bitter pill to swallow concerning the price, but it's really well made. With the current cost of lens, the price is in line. I do miss the EF 1.4 and 2x prices though. The paint doesn't seem to match the same tone as the 200-800's paint scheme.

Very pleased with this lense doubler. Canon is my go to and this lives up to my expectations.

Does an awesome job, but a bit on the expensive side. Compared to other brands, this one cost more and there isn't a lot of science behind it. But it is good quality and does what it does, making a 400mm do 800mm. Just know a few things! It'll be half the f-stop, twice the shake, the image stabilization will not be as good, and you are going to think about ISO more. That said, I've had a lot of fun being able to reach twice as far. I've done the solar eclipse, moon, sunsets, birds, and other animals.

I used it on RF 200-800 F/6.3-9 and it does good job if there is enough light. I set aperture to minimum + a little bit more, and then compensate with shutter speed and ISO based on situation. So there is no magic - if we give up two stops of light, better we can compensate it with shutter speed (slow moving subjects) or ISO (good enough environment light). Then results are great. Here I provide images of Moon with and without (cropped) converter. One may argue they are the same, but they are not. Image with converter has actually a little more information in it. The image is sharper. It depends on quality of lens a lot. The images attached are taken with non-L lens. Kudos to Canon for making this product transparent for AF and other features on camera. As of price - this could be made more affordable I guess. Converter is expensive but I am keeping it.

This item is NOT compatible with all the lenses it says it is.

Very impressed with this extender. Yes the price is a little steep and giving up a couple of F stops are disadvantages. But if you look at buying the cheaper Canon 800mm, you're looking at an aperture of F11 at $1200 or to go with the pro 800mm lens, you're looking at $18,000. So you have to weight the advantages to disadvantages to your needs. I primarily use this for outdoor nature photography so I can compensate for the higher f stops. I use a R6 M2 with a 100-400 RF lens, here are a couple of samples with extender. Dragonfly: shutter 1/1250, F16, 2000 ISO Butterfly very overcast day: 1/1250, F16, 3200 ISO Painted Bunting dark shade and tripod: 1/80, F16, 3200 ISO

This extender paired well with the rf 100-500 for bird photography. The image quality was good, or at least I couldn't notice a difference. The focus speed is just a tad slower than the rf 1.4x extender, but completely acceptable (even for birds). As any extender will, the light to lens is greatly reduced. So the iso goes up and the image degrades or the shutter speed gets slower; or both. I think it's a good purchase if you need a little extra reach and don't like cropping in post.

I have a 100 to 400mm making it 800mm F16 since it doubles size and f-stop. I used it with my APSC or Cropped Sensor camera. Equivalent to a bit over 1200mm. F16. Value- Worth Every Penny. Image Stabilization - None Do Auto Focus - No impact Size, Weight - Negligible since is close to the body. Compatibility - No issue. Works out of the box.