I Turned a Cheap Camera Into a DIY Interchangeable-Lens Camera

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The quick verdict: I turned a cheap point-and-shoot into a camera that could take a small interchangeable lens, and it produced a more interesting image than my tiny keychain camera builds. It also had a serious pink color cast, took a lot of tinkering, and isn't a camera I'd recommend building just to save money. As an experiment, though, it was a lot of fun.

Why I started modifying tiny cameras

I've been having fun taking cheap cameras apart and trying to make them do things they were never designed to do. In an earlier project, I added interchangeable lenses to a tiny G6 keychain camera. Being able to swap lenses was cool, but changing the lens didn't magically turn that little camera into a great one.

For this follow-up, I wanted to push the idea further: try some ridiculous lenses on the tiny camera, then see what happened when I put a better lens on a larger cheap point-and-shoot.

A giant telephoto lens on a tiny camera

First up was a 420–800mm lens with a 2x teleconverter attached to the modified G6. The camera looked absurd behind a lens that much bigger than it was, and the result was just as difficult to use as you'd expect.

At that extreme magnification, every little movement showed up in the image. Rolling shutter and vibration made the footage difficult to use, whether I was aiming at a distant pole or trying to follow a plane. It was a funny demonstration of just how much reach you can get from a tiny sensor, but it wasn't a practical wildlife setup.

I also had to deal with a blue flashing light leaking onto the G6's sensor after the modification. That was a useful reminder that once you open up a camera, even a small light inside the body can affect the image.

The cheap point-and-shoot that surprised me

The more promising project started with a larger budget 4K point-and-shoot I'd tested before. I took it apart, removed its original lens assembly, and worked out how to position a new mount in front of the sensor. The setup used a C-mount ring, an infrared-cut filter, and a small f/1.6 CS-mount lens.

Getting the spacing and alignment right was a big part of the project. A lens doesn't become useful just because you can attach it to a camera: it has to sit in the right place to focus, and the sensor has to be properly aligned behind it.

Once I got it working, this was the camera that impressed me the most. Compared with my tiny camera experiments, I liked what I was seeing in lower light and the separation I could get between a subject and its background. I also took it out to try a shot of the moon. You can see the actual tests and images in the video above.

The color problem I couldn't ignore

There was a catch. Straight out of the camera, the photos had a strong pink cast around the edges with a greener center. I couldn't say for sure what caused it, so I wouldn't treat any single explanation as a confirmed fix.

I used black and white for some of the photos to get around the distracting color. That makes the images easier to enjoy, but it doesn't mean the underlying color problem was solved. If you're expecting clean, reliable color photos from this build, that's a pretty important limitation.

What about the other lens experiments?

I tried reversing the idea by putting a tiny M12 lens up against an ARRI Alexa. I couldn't get it to focus in that setup. Small lenses and camera mounts have their own spacing and image-coverage requirements, so a lens that works on a tiny sensor isn't automatically a usable match for a cinema camera.

I also tried an anamorphic lens on a small camera. It was an interesting proof of concept, but the image was soft and the effect was limited in my test. The video is the best way to see how those experiments actually looked.

How much did the DIY camera cost?

When I made the video, the point-and-shoot body was roughly $40–$50. I found the lens used for about $10, while the filter was around $12 and the mount about $10. That's before other supplies and tools, and the prices of individual parts can change. My rough all-in estimate with extras was around $100.

That also doesn't account for the time spent opening the camera, fitting the mount, troubleshooting, and testing it. This is a project for someone who enjoys experimenting and accepts that a camera may be damaged in the process.

Would I recommend building one?

As a fun DIY experiment, absolutely. As a sensible way to buy a camera, no. The modified point-and-shoot gave me a better result than I expected, but the color issue and amount of work make it hard to recommend as a practical photography camera.

If your goal is simply to take better photos for the money, I'd look for an older used camera instead. My guide to shopping for used cameras at KEH, eBay, and MPB explains how I compare listings, condition, and price. If you want another inexpensive project to read about, here are two $50 used DSLRs I actually like.

Frequently asked questions

Did the interchangeable lens improve the cheap camera?

In my experiment, the modified point-and-shoot produced a more appealing result than my tiny keychain camera builds, especially in lower light and subject separation. The comparison is based on my tests, not a controlled measurement of every cheap camera.

Why were the photos pink?

The images had a pink cast around the edges and a greener center, but I didn't establish the cause. I used black and white for some photos instead of claiming to have fixed it.

Can you put any lens on a tiny camera?

No. A lens needs the right spacing to focus and sufficient image coverage for the sensor. Even when a combination can be adapted, the results may be soft, shaky, or otherwise impractical, as several of my tests showed.

Is it cheaper than buying a used camera?

Not necessarily. The parts and extras added up to roughly $100 in my estimate at the time, before counting my labor. A used camera may be a better value if you're after a dependable tool rather than a project.