Reddit mentions of Canon EF 24mm f/2.8 IS USM Wide Angle Lens - Fixed

Hey guys! First time checking out this subreddit.

Current camera: Canon T5i

Current lenses:

• Kit (Canon 18-55mm)
  
• 50mm f/1.8
  
• Canon 55 - 250mm
  
  
  Two questions:
  
  1: I wanted to get a wide angle lense for doing some star photography / landscapes / cityscapes. I was torn between these two lenses:
  
  
• Canon EF-S 10 - 18mm IS STM
  
• Canon EF-S 10 - 22mm USM
  
  I don't really care that the 10-18 is mostly plastic, given the lenses I already have. But, I didn't know if the 10 - 22mm would be worth it. It also seems to be lacking IS but would it be more versatile having the extra 4mm and toting it around for the day?
  
  2: While I love the prime 50mm I have, I find that it's incredible zoomed in for obvious reasons. I see a lot of amazing pictures taken (suggestive/tainted opinion, photos of which I aim to take) with prime lenses around the 20mm's range. These two lenses I was interested in and didn't know if they are more "wide angle" than they are actually for candid/portraits and a good reliable daily shooter:
  
  
• Canon EF 24mm f/2.8 IS USM
  
• Canon EF 28mm f/1.8 USM
  
  Again, I'm running into the IS or no IS problem. Didn't know if people have had experiences with either.
  
  Thank you!

Like someone else said, they seldom do. There's one example that comes to mind, though: the EF 24mm f/2.8 IS USM, a full-frame lens, is twice as long, twice as heavy, and four times more expensive than the EF-S 24mm f/2.8 STM. While the IS in the EF lens is a factor, look at the size of the optics. The crop lens can use a much smaller optical design because it doesn't need to project as large an image circle as the full-frame lens.

So it's not just about cheaper lenses, it's about smaller and lighter as well.