What is the best budget telephoto lens for the Canon EOS R10 that isnt going to cost me a fortune? I just got this camera for my birthday and I am honestly so confused by all the different names and numbers on everything. I really want to take pictures of birds and wildlife in my backyard but the lens it came with just doesnt zoom in far enough and everything looks like a tiny speck. I am leaving for a big trip to Yellowstone in exactly six days so I am kind of panicking and need to buy something fast so it arrives before I fly out. My budget is really low, maybe $400 or $500 at the absolute most because I am a student and I have already spent way too much on this hobby lol. I keep seeing people talk about RF lenses and then some people say I should get an adapter for older lenses but I dont even know what an adapter is or if it is hard to use. Is there just one simple lens I can click onto my R10 that will let me see stuff far away? Sorry if this is a stupid question I just have no idea where to start and the clock is ticking...