Free Standard Shipping to the US Lower 48 & Canada on Orders Over $200

5-25x56mm Professional

USD $5,885.00 - USD $6,778.00
4 reviews Write a Review
  • Safe & Secure Shipping

  • Free Support

  • Safe Payments

  • Amazing Selection

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

  • 56mm objective lens
  • 34mm main tube
  • eleven reticle illumination settings
  • side parallax adjustment
  • TOOL-LESS RE-ZERO® feature (US Patent # 10,591,253)
  • non-translating knobs with elevation zero-stop
  • double-turn elevation with rev indicator
  • 5-25x magnification range
  • lockable rapid adjusting diopter

Check out our latest feature: AIF Turrets. A - Auto, I - Isolation, F- Feature



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 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
Product Group:
Tangent Theta
Optic Brand:
Tangent Theta

4 Reviews

  • 5
    5x25x56mm ,gen2,MOA ,ER

    Posted by Yves Paradis on 2023 Nov 24th

    Exceptional glass quality, the purity of the colors is breathtaking, the parallax is very forgiving! The reliability and general quality is incredible...second to none! Top notch service, so proud of this product.** Tangent -Theta yours. Yves

  • 5

    Posted by Rob Ostrowe on 2023 Mar 5th

    Best glass I’ve ever seen. Believe the hype! This scope is awesome. I own other “premium” scopes (Nightforce, Leupold Mark 5, Vortex Razor Gen II); the Theta clarity is significantly better. Also, the turrets are the best I’ve felt/heard.

  • 5
    TT525P Scope

    Posted by John Stewart on 2022 Dec 13th

    This is the third “Professional” model I’ve purchased and I obviously keep coming back for a reason. Many other independent reviews point out the scopes’ excellent clarity and tracking, and although the toolless zero reset is a minor convenience, convenience it is. Another nice touch for the professional is the included antireflection device. But the thing that really prompted me to make a third purchase is the very generous eye box that the scopes provide. This is a factor that isn’t subject to hard specifications, and most reviews don’t mention it, but it makes it so much easier to pick up the reticle in the prone and when shooting from other awkward positions—something this old body really appreciates. I have other upper tier riflescopes, but Tangent Theta is definitely the best.

  • 5

    Posted by Doug on 2021 Dec 12th

    Unbelievable optic. Next level customer service. Thank you

Q. Why do I have illumination issues with my Tremor3 or H59 reticle?
A. Due to licensing agreements with Horus, we are limited in what we can illuminate to only the center dot and (on the Tremor3) the 2, 4, 6, and 8 MRAD dot below the horizontal crosshair. Our illumination module is also designed to limit stray light emissions from the front of the scope, which means that illumination on the Horus reticles we offer is optimized for use in low light and clip on night vision. As such, you may not be able to see the illumination with the naked eye during the day.

Q. What rings should I use?
A. We mostly use Badger Ordnance and Cadex Defence mounts here, but any high end mounting solution will work well for you as long as you take care to follow the torque guidelines set out in the instructions.

Q. What is the torque spec when installing my Tangent Theta scope?
A. For our TT525 and TT315 'P' series scopes (34mm tube) we recommend up to 25 in/lbs. For our TT315M & LHR (30mm tube) we recommend 15 in/lbs.

Q. What is the warranty for my TT?
A. We offer a lifetime warranty against manufacturer defect, and we conduct all warranty and non-warranty repairs at our facility here in Halifax. The same people who built your scope will be the ones to look after it in the unlikely event it needs any work done.

Q. How do I clean my scope glass?
A. First, use a soft brush or cloth to remove any dirt or grit. Then use either the microfiber end of the included lens pen or a quality microfiber cloth to clean the lens. Use a circular motion, working from the inside to the outside.