Upgrading (Or Buying) Lens or full frame ?

Digital cameras has crop sensors, meaning that they don't have that conventional 35mm frame behind that glass. This crop sensors sometimes give photographers an OCD on wanting a full frame sensor because that 35mm sensor is basically point 0 (Zero) when it comes to lens focal length, your 50mm is actually a 50mm unlike on a crop sensor where you have to compute for its equivalent focal length .

For a beginner photographer, this isn't much to care about because they haven't yet understood the differences between all the focal lengths. But for someone with experience, especially to street photographers, this means a lot .

canon eos 1100D :Crop sensor entry level camera

Let's say you can't really afford much and you bought an entry level camera with a crop sensor with a 1.6 crop factor, that makes your 50mm an 80mm. With a prime lens, this is a little bit tough to deal but it's okay with a standard zoom lens because you could just turn it to 24mm and you get your 50mm equivalent.

Achieving your desired focal length with a prime lens is hard, unless you upgrade to full frame or buy a wider lens. If you have the money to buy a full frame, I say buy the full frame. But if you don't, you may start to think whether to buy a wider lens or save up for a full frame dslr . 

A full frame dslr has many benefits, One is you get the right focal length equivalent of course. You're truly happy that you're not getting lied to about your focal length and you enjoy that sharp prime lens. Second is a bit of a theory. Full frame sensors are less noisy when bumping up to a higher ISO . That's a big benefit especially when you're still out shooting in the night. Last but not least, A full frame dslr has tons of features that will be useful and will improve your photography. 

The Full frame 5D Mark II

Take the Canon 5D for example, it's full frame and pimped out with buttons and dials . but that is too expensive compared to just buying a wider lens to compensate for the focal length you want.

When you buy a wider lens, you save money and you get to buy more lens with the rest of your money. Investing in good lenses is always a better choice because there are more lenses to choose from than there are full frame cameras that you could fit your lenses into .

Yashica Electro 35 GSN Rangefinder

Bottom line, I suggest you go with wider prime lenses. It's cheaper than a full frame dslr. If you still want a full frame camera that isn't cheap, then go buy a film camera with a 35mm film. there are some people who sell cheap but in good condition cameras. Some rangefinders online only cost about $100 or less. And Also, when you decide to buy wider lens , don't forget that you could also fit them into a full frame dslr. So go buy and invest with wider lenses and then buy a full frame . That would be my suggestion , because that is what I have decided as a photography with a small income .