The Canon RF 600mm f/11 IS STM and RF 800mm f/11 IS STM lenses both offer extreme reach in portable packages and at very affordable prices, but with so many similarities, you are unlikely to buy both. So, how do you choose between them? This helpful video answers that question.
Coming to you from Christopher Frost, this great video discusses the differences between the Canon RF 600mm f/11 IS STM and RF 800mm f/11 IS STM lenses and how you might want to choose between the two. While there is a difference in price and a rather substantial difference in size between the two, another thing to consider is your ability to crop. The difference between 600mm and 800mm isn't as extreme as the difference between something like 50mm and 250mm. This means that you might be better off using the 600mm f/11 and cropping in if needed (unless you absolutely need every last bit of reach), particularly if you are using a high-resolution body, like the EOS R5, on which you have megapixels to spare. Remember that you can always crop in a bit, but if your subject is too large for the frame, you can't fix that in post. Check out the video above for Frost's full thoughts on both lenses.