top of page



Tangent Theta 5-25x56mm model TT525P Rifle Telescope is an extreme-range precision sighting instrument for professional marksmen. Designed for heavy field use, Tangent Theta’s industry-leading development team has used their extensive experience to optimize and refine it for unfailing ruggedness, mechanical precision and unsurpassed image quality. Elevation and windage mechanisms exhibit precise tactile response and feature a truly TOOL-LESS RE-ZERO®  procedure.

Tangent Theta rifle telescopes are built in Canada and are specifically designed and function-tested for long lifecycles in the harshest of environmental conditions.

Key Features

  1. 56mm objective lens

  2. 34mm main tube

  3. eleven reticle illumination settings

  4. side parallax adjustment

  5. TOOL-LESS RE-ZERO®  feature (patent pending)

  6. non-translating knobs with elevation zero-stop

  7. double-turn elevation with rev indicator

  8. 5-25x magnification range

  9. lockable rapid adjusting diopter

FEATURE                                           SPECIFICATION

Magnification                                   5x-25x

Length                                                425mm

Width                                                   103mm

Height                                                  86mm

Weight                                                 1150g

Tube diameter                                 34mm

Objective bell diameter               65mm

Objective lens diameter              50mm nominal

Eyepiece diameter                        45mm

Reticle options                                Tremor3, Gen 2XR, MoA

Field of View @ 5x                          4.3 degrees (7.6m @ 100m)

Field of View @ 25x                       0.9 degrees (1.6m @ 100m)

Diopter range                                  -3 to +2.5

Eye relief                                           90mm

Exit pupil @ 5x                                11mm

Exit pupil @ 25x                             2.3mm

Re-zero mechanism                   TOOL-LESS RE-ZERO® (patent pending)

Total Adjustment Range

Elevation                                          30 mrad (103 MoA)

Windage                                           +/- 10 mrad (+/- 34 MoA)

Working Adjustment Range

Elevation                                         28 mrad (96 MoA )

Windage                                          +/- 6 mrad (+/- 20 MoA)

Adjustment resolution             0.1 mrad or 1/4 MoA

Parallax adjustment range     50m to infinity

Crosshair illumination              LED, 11 settings

Battery type                                  DL2032 3v lithium

Exterior finish                              Type II Anodized, matte


Waterproof:                                  4 hours @ 10 meters

Shockproof:                                 700g's @ 10,000 cycles

Standard accessories:            Tenebraex lens covers & ARD

If you are interested in this product please contact us below
Contact Us

Thanks! Message sent.

bottom of page