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Description
3.97mm f/2.8 82d HFOV 16MP (No Distortion)(No Filter)The 3. 97mm is our newest 4K lens designed for the GoPro HERO camera line. With its 16MP sharp 8 glass non fisheye optics this lens captures the GoPro HERO 4, Hero 3+ and Hero 3 model's 12MP photos and up to 4k (8. 4MP) video. After removing the stock lens the 3. 97mm threads in easily. No need to change to a different lens mount and all GoPro accessories that mount around the plastic black lens surround are supported. No gap is present between the
The 3.97mm is our newest 4K lens designed for the GoPro® HERO® camera line. With its 16MP sharp 8 glass non-fisheye optics this lens captures the GoPro® HERO® 4, Hero 3+ and Hero 3 model's 12MP photos and up to 4k (8.4MP) video.
After removing the stock lens the 3.97mm threads in easily. No need to change to a different lens mount and all GoPro® accessories that mount around the plastic black lens surround are supported. No gap is present between the lens and the black GoPro® lens surround as the 3.97mm lens spans the entire cavity.
No fisheye/barrel distortion means objects are naturally straight and just as your eyes see the world. Mounting to a UAV? You'll be glad to know that's exactly where we mounted this lens the most as we were tweaking its production. See the videos below for examples mounted to the 3DR SOLO.
With the same f-stop as the stock lens the GoPro® software will never know the lens has been changed. Light levels will be handled as normal and depth of field will be very similar.
With it being over 40 degrees narrower than the stock GoPro® lens and 8 degrees narrower than the DJI Inspire and Phantom 3 cameras, this lens brings your subjects closer without being too zoomed in to introduce unwanted image jitter.
If you've thought of changing the lens on your camera but were never happy with the way the lenses on the market handled lens flare, you'll be glad to know that was a major concern of ours during development. We went through many iterations to reduce any "bad", concentrated flare spots and left only minimal cinematic flare. See the "Sunset at Scripps Pier" video below for an example.
| When you change the lens on the GoPro® HERO® cameras we recommend having us remove the stock lens profile software so the colors are natural (and not tinted pink around the edges). All example media shown has this lens profile removed from the camera. |
| Don't want to worry about sending you camera in to be modified? We sell new cameras with this lens installed HERE. |
| Model Number | GP39728 |
| Focal Length | 3.97mm |
| 35mm Equivalent | 22.63mm |
| Fish-eye Distortion | NO |
| Black Vignetting | NO |
| Weight (Stock Lens = 5.5g) | 15g |
| Angle of View (V*H*D) | 65 x 82 x 92 degrees |
| Aperture (f Stop) | 2.8 |
| Back Focal Length (BFL) | 4.65mm |
| Dimensions (Diameter x Length) | 17.40 x 22.48mm |
| Native Camera Sensor Support | 1/2.3" |
| Native Megapixel Support | 16MP |
| Thread Material | Metal |
| Optics Material | Glass |
| Fits in GoPro Waterproof Case? | Yes (Pressure on Lens Will Cause it to Shift Focus, So Use Extended Backdoor) |
| Case Mod Needed? | No (But Puts Less Pressure on Lens) |
| Dust Ring Included? | Yes (DR_A + DR_B) |
Works With These Cameras:
Example 3.97mm Media:
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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★★★★★ 5
Best spray I’ve tried
Style: Spray (6 Oz)
Great product, worth the cost
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Perfect for people who take carry on bags flying to beach vacation!
Style: Spray (2 Oz)
THE only spray on sunscreen, that is NOT a 200 SPF, thats less than 3.5 ounces so TSA doesnt confiscate it from bag en route to Cancun. I keep a few in the drawer and take the partially used one from last trip to finish off plus a new sealed one as backup. Smells great and sprays a fine lovely mist so you dont fry. LOVE this product. A GREAT purchase. We dont check bags and its hard to find ANY product in under 3.5 ounce packaging. Sure you can pour sunscreen into bottles that mfg says do not leak, but youll learn the hard way that they DO leak all over the inside of your suitcase. Skip that learning experience and buy COOLA.
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Reviewed in the United States on March 5, 2024
★★★★★ 5
Best Sunscreen and Reef Safe
Style: Spray (6 Oz)
I've been using this sunscreen for a couple of years now and this is the one! The lotion and the spray are both great, smell good and are reef friendly and organic. They are pricey but my skin appreciates the extra!
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Reviewed in the United States on July 22, 2024
★★★★★ 5
Works like a charm
Size: 7 Fl Oz (Pack of 1), Style: SPF 30
Easy to apply. No heavy scent. I'm very pale and am able to have fun in the sun without burning.
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Reviewed in the United States on February 27, 2026
★★★★★ 5
Sunscreen
Size: 7 Fl Oz (Pack of 1), Style: SPF 30
Love this sunscreen for using in the pool. Goes on smooth. Absorbs quickly. No white residue. I apply ever 2-3 hours after getting in the pool. Seems to do its job and prevent sunburn.
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Reviewed in the United States on March 1, 2026