12x42 Professional Binoculars ED Lens BAK4 Prism Waterproof Metal Telescope for Outdoor Bird watching Camping Traveling
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Specifications
- Brand Name
- LOERSTON
- Magnification
- 12X
- Objective Lens Diameter
- 42mm
- Eyepiece diameter
- 23mm
- Field of View
- 123M/1000M
- Type
- Binoculars
- High-concerned chemical
- None
- Water Resistance Level
- IPX6.5
- Origin
- Mainland China
- Lens Coating Description
- FMC
- Focus Type
- CENTRAL
- Prism Description
- BAK4
- Model Number
- C8090
- Eyepiece diameter:
- 23mm
- Material:
- Metal frame + outer rubber
- Magnification:
- 12X
- Exit pupil distance:
- 17mm
- Focusing system:
- center axis focusing
- Objective diameter:
- 42mm
- Prism diameter:
- 16.5mm
- Exit pupil diameter:
- 4.2mm
- Field of view:
- 123M/1000M
- Product size:
- 18*6*13cm
- Close focus distance:
- 3m
- Color:
- Dark green/black/blue
- Gross weight:
- 700g
- Prism system:
- BAK4
- Lens type:
- all-optical ED lens
- Choice
- yes
Product Description
Specifications:
Eyepiece diameter: 23mm
Material: Metal frame + outer rubber
Magnification: 12X
Exit pupil distance: 17mm
Focusing system: center axis focusing
Objective diameter: 42mm
Prism diameter: 16.5mm
Waterproof system: IP67 waterproof and dustproof
Exit pupil diameter: 4.2mm
Field of view: 123M/1000M
Product size: 18*6* 13cm
Close focus distance: 3m
Color: Dark green/black/blue
Gross weight: 700g
Prism system: BAK4
Lens type: all-optical ED lens
Lens coating: A5 Zeiss Red +FMC full band green film
Pros & Cons
Pros
- ED lens and BAK4 prism for sharp, clear images
- 12X42 magnification with wide 123M/1000M field of view
- Waterproof IPX6.5 and rubber armored metal frame
- Central focusing for easy outdoor use
Cons
- 700g weight may feel heavy for prolonged use
- Close focus 3m limits very near viewing
- Specific colors only
- Exit pupil 4.2mm smaller in low light
Common Questions
What material are the 12x42 professional binoculars?
Metal frame with outer rubber; all-optical ED lens, BAK4 prism.
What size specs for LOERSTON binoculars telescope?
Product size 18*6*13cm; objective 42mm, eyepiece 23mm; weight 700g.
Compatible for bird watching camping? Waterproof level.
Waterproof IPX6.5; for outdoor bird watching, camping, traveling.
How to use the 12X binoculars with central focus?
Center axis focusing; 12X magnification, field of view 123M/1000M.
Shipping for 12x42 ED lens binoculars?
Choice: yes; origin Mainland China; colors dark green/black/blue.
Product information last updated on March 24, 2026