The Funleader 18mm f/8 cap lens was first launched on Kickstarter back in 2019, and it was quite successful raising about $35,000 USD.
The lens itself is an 18mm full-frame tiny pancake lens with a fixed aperture of f/8 that doesn't require autofocus. It has a depth of field from about 2.6feet to infinity, so you can just point and shoot and everything should be in focus.
I ordered one of these to try out. I don't expect L lens quality, but I do like to switch up the look of my shots at the lens instead of in post.
You can now purchase the Funleader 18mm f/8 cap lens on ebay for the RF mount, as well as Sony's E-Mount and Nikon's Z-Mount. It's relatively affordable for what it is at about $149 USD.
Funleader 18mm f/8 Cap Lens at ebay (when i started this post, it was in stock. It's currently showing as out of stock for the RF mount)
You can also buy directly from Funleader here.
FUNLEADER Cap Lens 18mm f/8 Technical Specifications
- Focal Length: 18mm
- Aperture: f/8.0
- Field of view: 100°
- Closest focusing distance: 0.8m
- Construction: 6 elements in 4 groups
- Coating: Multi-coated
- Body material: Brass
- Finishing: chrome plating
- Weight: 80g
- Size: 62mm × 15mm