Yes the lens is removable, that is a key feature of the DSLR cameras. Canon makes numerous lenses to suit a wide range of photo & video capture opportunities. Many can get very expensive, but there are plenty of consumer-friendly price points as well. I'm not a photographer, but have replaced the stock 18-55mm lens with an 18-135mm as my "walk-around lens" which gets a ton of use and a 100-400mm that I use for my son's baseball games and longer range shots requiring a more powerful zoom. Love the camera by the way, the ability to shoot photos AND video with one camera combined with all of the lenses is awesome.
Yes, on the T3i, the lenses are easily removed. Just push the release button on the left front side, and twist the lens off gently. Replace with any other compatible lens. Which is better, the 135mm or 55mm is a subjective question? Which is better, Ford or Chevy? The answer here depends on what you like to shoot and when. A 55mm lens on a cropped camera like the T3i will result in 55 x 1.6 or the equivalent of an 88mm lens, which happens to be very close to a perfect portrait lens. As for the 135mm lens, I can't imagine why I would own this lens. Rather have a 15-85mm lens which, at the 85mm setting, gives you the equivalent of a 136mm lens. So I have to wonder why you would want a prime 135mm lens for a cropped camera? HTH.
Yes the lens do come off and its pretty simple to switch the lens. 135 MM is the better Lens you can zoom in alot more than the 55mm. If you decide to go with the 55MM lens alot of people than buy the 250MM lens but that lens is pretty bulky so the 135 is a good compromise in my opinion and you only have to worry about carrying 1 lens instead of 2.
The lenses are interchangeable. It only takes a few seconds to change. You push a button and twist the lense off.
If you are new to photography, go with a versatile lense lie a 55mm-135mm. This way you can zoom in close (135mm) or have a wide angle view (55mm). If new, I would recommend you don't go with a single focal length lense like a 55mm or a 135mm. Hope that helps. Costco and qvc have a good bundle package on T3i. I am sure you can find on amazon as well. Bundle has camera, 2 lenses and a carrying case
yes the lens comes off.what lens depends on what you want to take pictures of......you don't sound like you know to much about cameras or lenses read up on both they DO NOT MAKE a 55 mm or a 135mm lens the 50 mm lens is a good lens. get the 1.8 cheaper on for 100.00 that lens works well for video.
Yes; you hold down a button and it will twist off. I don't have the 18-135mm lens, but I can tell you now that the 18-55mm lens has a very bad zoom and it barely zooms in at all! I do like macro photography and the 18-55mm lens is perfect to reverse for macro shots.
Yes, of course, it's an SLR, standard Canon EOS bayonet mount. Depends on what you want to use the lens for. I'd not get either of those, but a good Canon prime lens. Something in the 18 or 20-24mm range. Rent a Canon 24mm f/1.4. You'll be impressed. For a walk around wide-range zoom, try Tamron's 18-270. For something a bit sharper, try a Sigma 17-50 f/2.8. Canon's 16-35 or 17-40 is pretty sharp, but at F/4 for the 17, it's not much for low light.