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Best prime lens for Canon EOS R50?

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Hey everyone! I recently picked up a Canon EOS R50 as my first mirrorless camera and I’m trying to add a good prime lens to my kit. Right now I only have the RF-S 18-45mm, and while it’s convenient, I really want something faster for better low-light photos and more background blur.

I’m mainly shooting portraits of friends/family and casual street/travel stuff. I also do some indoor shots in average room lighting where the kit lens struggles (I’m seeing ISO jump up fast). Since the R50 is APS-C, I’m a little confused about what focal length makes the most sense—like whether an RF 35mm f/1.8 would feel “normal,” or if something like a 50mm f/1.8 ends up too tight.

Budget-wise I’m hoping to stay around $300–$500, and I’d prefer something with decent autofocus and sharpness wide open (f/1.8-ish). I’m open to RF or RF-S options.

Given the EOS R50 specifically, what prime would you recommend as the best all-around choice, and why?


8 Answers
20

- For your situation, I’d grab the Canon RF 35mm F1.8 MACRO IS STM—on R50 it’s a ~56mm “normal-ish” view, *actually* great indoors + street, and IS helps a ton (50 1.8 felt too tight, ngl).


14

Seconding the recommendation above. I’ve been shooting Canon APS-C for years and honestly the “mid-30s” prime vibe is just *chef’s kiss* on these bodies — it’s pretty much the focal length you leave on all day.

A few practical/budget notes:
- For $300–$500, stick to native Canon glass if you can… autofocus is usually just less drama.
- Look for a fast-ish prime *with stabilization* if you shoot indoors a lot — it buys you real keepers at lower ISO.
- A “nifty fifty” type lens is fun, but on APS-C it gets tight fast indoors (been there, backed into walls lol).

Lesson learned: pick the focal length you’ll actually carry, not the one that looks coolest on paper. gl!


12

Same boat, watching this


4

Seconding the recommendation above. A mid-30s prime on the R50 really is that sweet spot… it ends up feeling like a “normal” view (not ultra-wide, not tele), so it works for travel/street AND indoor family stuff without you backing into a wall lol.

Option A: a native Canon prime in the ~30–35mm range. Pros: AF is usually super reliable on the R bodies, size/weight is chill, and you get that nice subject separation at f/1.8-ish. Also, if it has stabilization, that’s *actually* clutch indoors—lets you keep shutter speeds lower so ISO doesn’t explode (your subjects still gotta hold still tho).

Option B: a budget “nifty fifty” type prime. Pros: cheap, sharp, lots of blur potential. Cons: on APS-C it’s pretty tight for small rooms and even casual street can feel like you’re sniping people from across the sidewalk… ngl it can be frustrating.

Option C: a third‑party autofocus prime around ~30mm. In my experience they’re pretty good value, but AF can be a tiny bit less consistent vs Canon, especially in low light (not always, just… sometimes).

If you want one do-it-all prime, I’d go Canon in that ~35-ish range and call it a day. gl!


4

Like someone mentioned, that wider focal length is usually the default advice for one-lens setups. But honestly, in my experience, I actually found the opposite to be true when I was starting out. I spent months trying to make a semi-wide prime work for portraits because everyone said it was the versatile choice. It was fine, but my shots always felt a bit... flat? Like they lacked that professional pop I was seeing online. I eventually swapped to a longer focal length—the one that everyone says is too tight for indoors—and it changed everything for me. Yeah, I had to back up into the hallway a few times to fit my kids in the frame, but the way it compressed the background and handled low light was just night and day. If you care about performance and that creamy blur, dont be afraid of the tighter squeeze. I learned that versatile sometimes just means middle of the road, and Id rather have a lens that does one thing perfectly than one that does everything just okay. Just food for thought before you commit to the wider glass.


3

Just catching up on this thread. Honestly, I've been super satisfied sticking with native glass on my camera. For the best experience with the autofocus and weight, just stick with the Canon brand. You really cant go wrong with their affordable prime lineup right now. A few resources that helped me decide:

  • DPReview for looking at side-by-side spec comparisons.
  • YouTube reviewers like Christopher Frost who do clinical sharpness tests.
  • The official Canon refurbished site for snagging deals in your budget. Comparing Canon to third-party stuff like Sigma or Tamron, the native lenses just feel more reliable for tracking moving people. I had no complaints once I committed to the RF system. Just grab any Canon prime that fits your price range and you'll be happy.


3

Ok adding this to my list of things to try. Thanks for the tip!


2

Same boat, watching this


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