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Matt from DIYPerks has recently built a f0.4 lens on an estimated total cost of $190: https://www.youtube.com/watch?v=9cT0jXI7l4E https://www.youtube.com/watch?

Matt from DIYPerks has recently built a f0.4 lens on an estimated total cost of $190: https://www.youtube.com/watch?v=9cT0jXI7l4E https://www.youtube.com/watch?v=9cT0jXI7l4E

nicoburns 4y ago
Impressive as that project is, for the most part they bought that lens rather than building it.
- rglullis 4y ago
  So is this one here, no? Both projects seem to assume that the glass itself is a given.
  - hwsmythe 4y ago
    But here the aperture and focus is also 3d printed
    - rglullis 4y ago
      Matt also did the part about focus (between the projector lens and the fresnel lenses) but ok, I guess it is an important distinction that you made.
- lesuorac 4y ago
  Not my area of expertise but you might be able to CNC the lens. (Part 2: Goes into math) https://www.youtube.com/watch?v=ADtw6cxEK28 https://www.youtube.com/watch?v=ADtw6cxEK28 (Part 1: Shows CNCing / usage) https://www.youtube.com/watch?v=ZW2lj0KjyT8 https://www.youtube.com/watch?v=ZW2lj0KjyT8
  - digdugdirk 4y ago
    Super cool project, and they did a really great job documenting the process. That said, a hobbyist level CNC will not be able to make a functional lens. Tolerances are way too high. Maybe it'll be good enough for focusing light and burning holes in paper, but it's not going to be remotely close to photography level.