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Bering Optics ACE series 10x42 Side Focus

by Bering Optics
Price £172.50

ACE series 10x42

The Ace models are built with high quality optics that provide sharp and high resolution viewing in various conditions. The fully multi-coated optics with green tint was designed to improve the light transmission coefficient in order to achieve a brighter, clearer image in sunset or sunrise environment. The robust d30mm mono-tube scope body is milled from one solid piece of aircraft aluminum and finished in matte black to prevent undesirable reflections.

The sights feature illuminated switchable reticle, red or green, with five brightness settings. The sights may be used without a battery. The reticle is black in off position. The Ace sights have a side focus parallax adjustment mechanism that allows parallax correction from 10 yards (meters). The parallax correction wheel is included with the sight to make the adjustment precise and convenient. The parallax correction wheel has specially designed grooves to avoid off-set positions when it is set up and in use.

All adjustment mechanisms such as focus, windage and elevation have been perfected to have smooth and pleasant action to make the sights use satisfactory. Optional accessory includes a 3" (77mm) sunshade BE55901 to prevent glare in sun bright conditions.

Product Modification






Magnification, x



Objective lens diameter, mm



FOV at a distance 100 yards / 100m, yard/m

8.5-2.7 / 8.6-3

4 / 4.4

Eye relief distance, mm

95 - 78


Diopter adjustment, D

+ 3

Exit pupil, mm

11 - 3


Focus range, approx., yard/m

10 / 9 to infinity

Light transmission coefficient, %



Reticle type

MIL-Dot illuminated

SIR illuminated

Reticle color

Red / Green / Black

Reticle windage / elevation adjustment range

+ 30MOA

Reticle windage / elevation adjustment at a distance 100 yards / 90m

¼ MOA per click

Scope tube diameter, in/mm

1.18” / 30

Overall dimensions w/out  a blend, in/mm

13.2”x2.4”x3.5” / 335x61x89

13.43”x2.4”x3.5” / 341x61x89

Scope weight, oz/g

24 / 680

22.4 / 635

Side focus parallax correction wheel, in/mm

2.28” / 58

Length with the lens sunshade, in/mm

16.22” / 412

16.46” / 418

Mounting length, in/mm

5.67” / 144

6.3” / 160

Power supply

CR2032 or DL2032 or ECR2032 3V battery (one)

Estimated battery life, hour


Operating temperature, °F/°С

-22 to +122 / -30 to +50

Water intrusion

Meets IPX4 rating

Humidity, %

to 93%



  • Sight
  • Side focus parallax correction wheel BE55900
  • Two flip-up protective caps BE55902
  • Allen (hexagon) key
  • Lens cleaning tissue
  • CR2032 (3V) coin-style battery
  • Instruction manual


About Bering Optics

Bering Optics is an independent manufacturer of a full-line of night vision optics, red dot sights and accessories. 

Established in 2009, Texas-based Bering Optics is one of the few remaining manufacturers that creates and designs its own products. 

Bering Optics product parameters have no rounding or exaggerations - the consumer gets exactly what is advertised. 

To ensure customer satisfaction, all products come with the Limited Lifetime Warranty for optical and mechanical parts. Furthermore, all products pass a quality check before being shipped to the customer. 

Customer supportive website,, featuring complete product information including key specifications, instruction manuals and the original “Look through the device” visual simulation feature. 

Gun Trade World magazine listed Bering Optics as of one of the leading manufactures in the Riflescopes as well as Night Vision Spotlight section during 2013 & 2014 seasons, a honour carried by only a few makers. 

The Bering Optics product line-up features more than 40 models. Every model has been well thought about and fully tested before being offered to ensure the maximum satisfaction and the same approach will be utilized as we keep expending the Bering Optics entire line.

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