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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16
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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
4.1 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Good quality device
Color: White
Nice device
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Reviewed in the United States on June 3, 2026
★★★★★ 5
5-in-1 Bikini Trimmer
portable, small, effective. Good charge and doesnt hurt.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Battery lasts long
Works wonderful. Cuts hair short, without cutting skin. Battery lasts long time. Easy to wash.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Meets all grooming need with multiple attachments.
Color: Beige
I can finally wear dresses and shorts without stressing over last-minute grooming. This tool has quickly become one of my go-to personal care essentials. Not only is it convenient, but it's also incredibly effective. With my busy lifestyle, having one device that meets all my grooming needs is a true game-changer.
The shave is smooth and comfortable, even in sensitive areas. I was worried about skin irritation, but the blades are gentle and prevent nicks or pulling. The variety of attachments is fantastic, letting me effortlessly switch between facial hair, underarms, legs, and bikini area without needing multiple gadgets.
I also love that it's rechargeable and cordless. The long-lasting batter and handy charging dock keep everything organized and ready to go. Plus waterproof is another advantage, since I can use it in the shower and clean it quickly afterward. Overall, I am so happy with this razor! It's versatile, travel-friendly, and does exactly what I need.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Safe and fast trimmings
Color: Beige
This 5-in-1 bikini trimmer is really convenient for everyday grooming and makes getting ready much quicker. The different replaceable heads are useful for trimming facial hair, underarms, legs, and bikini areas without needing to find different tools. It’s lightweight, cordless, and easy to pack for trips and used around in different places in the house without being limited by the cord, and the waterproof design makes it really simple to clean after use. The USB charging dock is also nice to have since you can keep it powered after you use it without dealing with batteries all the time.
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Reviewed in the United States on May 29, 2026
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