Onsight 375 Headlamp
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Why We Like The Onsight 375 Headlamp
When we go climbing we don't stop when the sun goes down, instead we reach for the Onsight 375 Headlamp. This headlamp boasts a low profile and a dual-beam configuration that lets you scale walls and solve problems after dark.
Details
- Versatile headlamp built specifically for climbing after hours
- 375 lumens on max setting ensures you can light up the crag
- Climbing and Route-finding modes optimize your beam style
- Perforated elastic headband offers reliable comfort and performance
- Dual-fuel lets you pick between AAA or rechargeable batteries
- Water and dust proof ratings lets you climb through bad weather
- Digital lockout feature prevents unwanted battery drain in pack
- Item #BLDZ9DF
- Power Source
- Lithium Ion BD 1800, Alkaline cells
- Batteries Included
- alkaline
- Modes
- climbing, route-finding
- Lumens
- 375
- Strap
- perforated, elastic
- Waterproof
- IP67
- Manufacturer Warranty
- 3 years
Reviews
Q&A
What do you think about this product?
Overall Rating
4.5 based on 72 ratings
Review Summary
Fits True To Size
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.Customer Images
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Selecting an option will reload the available reviews on the pageFebruary 26, 2025
Good value
Works as advertised. The addition of a red light feature would be a nice improvement
Originally reviewed on blackdiamondequipment.com
February 7, 2025
Great for long expeditions
I use this for multiple days out without access to a charge and limited batteries and it has yet to fail. Great cast of light. Would buy again.
Originally reviewed on blackdiamondequipment.com
February 1, 2025
Light and bright
Exactly what I wanted for my climbing helmet. Love the touch gestures to control the settings.
Originally reviewed on blackdiamondequipment.com
December 12, 2024
Works well
I’ve used this once. The light output is decent; however I was expecting more illumination as it was advertised for nighttime climbing. I would like to see a stronger intensity light for finding holds, bolts and features that are further away for route finding. The back battery pack is fairly heavy while the front bulbs are light. This makes for an imbalanced feeling. Adjusting intensity is easy enough. The battery life is short. The clamps to open the battery cover seem weak. I can’t speak for its robustness or longevity.
Originally reviewed on blackdiamondequipment.com
September 7, 2024
Perfect for night ops!
Bought these for my wildland fire crew! Perfect for when we need a nice widespread field of view but also need the focused beam for hiking a trail that may not be so obviously marked.
Originally reviewed on blackdiamondequipment.com
May 24, 2024
Love the wide angle
I have used this headlamp multiple times. Night climbing in the Gunks was pretty awesome. Gave me a very wide field of vision for climbing. It feels very balanced while wearing and works with a helmet well. Easy to change out the battery and love that you can use the battery pack and regular AA batteries. It my go to lamp for outdoor adventures and battery life has been great. I've used to climbing, hiking & splitboarding.

Originally reviewed on ExpertVoice.com
April 8, 2024
Feel the Quality
"I recently purchased this headlamp and I must say, it exceeded my expectations in every way. The build quality is top-notch, and it feels very durable. The straps are adjustable and comfortable to wear for extended periods. The brightness and beam distance are impressive, making it perfect for outdoor activities like hiking or camping. Overall, I highly recommend this headlamp for anyone looking for a reliable, high-quality light source."
Originally reviewed on blackdiamondequipment.com
March 5, 2024
Why so complicated.
- Familiarity:
- I've used it once or twice and have initial impressions
I just want a rechargeable headlamp that can also take regular batteries for convenience/emergencies/offgrid. I also like having battery back in back for comfort. So this gets pretty close but ultimately just frustrating. Rechargeable battery does not come with it; i bought the separate battery but it does not fit; it does say 1800 which was out of stock, but I got a 1500 but for some stupid stupid reason there is a battery contour strip which makes the 1500 not fit. Additionally, there is no charging port on the rechargeable battery; apparently I would need an external charger. Only sport this is excelled in was an exercise in frustration. One thing I DON'T love dealing with: half of my gear list being the friggin headlamp components. Get it together, BD.
March 5, 2024
I always use Blackdiamond headlamps
I always use Blackdiamond headlamps and I think they are the best I have used them for years
Originally reviewed on blackdiamondequipment.com
February 24, 2024
Great light that dims
Glad to have a headlamp with a dimmer. I've noticed that the batteries have lasted longer and I expect it's due to the dimmer functionality. I enjoy the flood light capability on my morning walks too
Originally reviewed on blackdiamondequipment.com
Do you have a question about this product?
March 5, 2025
Does this include rechargeable battery?
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