Celestron Trailseeker 42mm Binoculars

£179.00✓ 2 year warranty


2x in stock shipped 1-2 working days

About this product

Model:  cel_trlskr_10x42_71406
Part Number:  71406-CGL

TrailSeeker 10x42 binoculars are an excellent choice for walks, birding and nature observation.

Phase and dielectric coated BaK-4 prisms increase light transmission through the prism system.

They also offer a useful 6.5' close focus ability and a relatively wide field of view.

The lightweight magnesium alloy frame is durable and fully waterproof for use in any weather condition.

Video Tour


  • Magnesium Alloy Body: Lightweight, durable frame that will last a lifetime and handle use in the field.
  • BaK-4 Prisms with Phase and Dielectric Coatings: Increased light transmission through the prism system for brighter images. Increased contrast and resolution.
  • Wide Field of View: Quickly acquire the subject being viewed. Follow your subject more easily, with less need to move the binoculars.
  • Ergonomic Design
  • Fully Multi-Coated Opitcs: Increased light transmission for brighter views and more resolution.
  • 6.5' Close Focus: Detailed, up close observation of subject in close proximity.
  • Metal Multi-Stop Twist Up Eyecups: More durable with a longer life than plastic eyecups. Multiple stops for correct positioning of the eyes.
  • Tripod Adaptable: Attach your TrailSeeker to a tripod for extended viewing sessions.

360° Product Tour

What's in the box

  • Tailseeker Binoculars
  • Objective Lens Caps
  • Rainguard
  • Carrying Case
  • Neck Strap
  • Harness Strap
  • Lens Cloth
  • Instruction Manual


Objective Lens Diameter (mm)42 mm42 mm
Magnification (x)8x10x
Angular Field of View8.1°6.5°
Linear Field of View426ft / 142m341ft / 113m
Close Focus6.5ft / 2m6.5ft / 2m
Exit Pupil (mm)5.25 mm4.2 mm
Eye Relief (mm)17 mm15 mm
IPD Max73 mm73 mm
IPD Min55 mm55 mm
Optical CoatingsFully Broadband Multi-CoatedFully Multi-Coated
Weight (oz)23.1 oz (655 g)22.4 oz (635 g)
Dimensions LxWxH (in/mm)5.5" x 5.1" x 2" / 141 mm x 130 mm x 51 mm5.5" x 5.1" x 2" / 141 mm x 130 mm x 51 mm
Prism Glass (Type)BaK-4BaK-4
Twilight Factor18.3320.49
Relative Brightness27.5617.64
Nitrogen Filled (Fogproof)YesYes
Tripod AdaptableYesYes
Included ItemsObjective lens caps, rainguard, neck strap, harness strap, carrying case, lens cloth, instruction manualObjective lens caps, rainguard, neck strap, harness strap, carrying case, lens cloth, instruction manual

Downloads / Manuals

Celestron Trailseeker Instruction Manual (PDF)

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Q1. How much do these binoculars weigh?

The Celestron Trailseeker 42mm binoculars weigh approximately 635g / 22.4oz.

Q2. How do I use the harness strap?

Granite ED and TrailSeeker binoculars include a binocular harness strap similar to a photographerís Cuban hitch. This harness strap serves a dual purpose. Compared to the conventional neck strap (also included with your binoculars), the harness distributes the weight load of the binoculars to your shoulders and torso, taking the strain off your neck. It is very comfortable and also safely keeps the binoculars handy when carrying them during extended use.

To use the harness, first find the small straps (about 6 inlong) that came with your binoculars. Remove the regular strap to get it out of the way. Thread the shorter straps (one on either side) onto the binoculars.

Once you've threaded the short straps, you can don the harness. The mesh side will go against your back, while the perforated fabric side will face outwards. Pass your ams and shoulders through the two loops so the harness panel rests on your back. Next, clip the binocular's two short straps to the swivel hooks on the harness. You are now set to observe with your binoculars.