The Guide TU635 3.0 is a 640 x 512 thermal scope from the Guide TU 3.0 series. It pairs a 12 µm sensor at 18 mK with a 35mm F1.0 lens for detection out to 1800 m, and runs on a built-in 18500 cell plus a replaceable 18650 for up to 12 hours. If you want the newer APEXVISION version, compare it with the Guide TU635S 3.0.
Guide TU635 3.0 Features
640 x 512 sensor at 18 mK
The 12 µm VOx detector picks up small temperature differences, so animals stand out clearly against grass, scrub and timber, even on humid or misty nights.
35mm lens with 3x to 24x zoom
The 35mm F1.0 lens gives an 11.8° x 7.1° field of view, about 21 m wide at 100 m, with 3x base magnification and digital zoom up to 24x. Detection range is up to 1800 m.
Shutterless image
The 3.0 shutterless design keeps the image running without the click and freeze of a shutter calibration while you are tracking an animal.
Central focus wheel and zoom lever
Focus and zoom sit where your hand falls, so you can adjust them without taking your eye off the target.
Full HD display and 10 reticles
A 0.49 inch 1920 x 1080 AMOLED display with 48 mm eye relief, 10 reticle styles in 5 colours and picture-in-picture mode.
Built for recoil and weather
Recoil tested to .300 Win Mag, shock resistance of 6000 J / 1200 G and IP68 protection. It fits standard 30 mm rings.
Recording and app connection
Photo and video with audio to 128GB of internal storage, with dual band Wi-Fi and Bluetooth for the TargetIR app.
Want to see what else is out there? Browse our Guide 640 thermal scopes or read how to choose a thermal scope.
Guide TU635 3.0 Specifications
| Sensor | |
|---|---|
| Detector type | Uncooled VOx, 8 to 14 µm |
| Resolution | 640 x 512 @ 12 µm |
| NETD | 18 mK |
| Frame rate | 50 Hz |
| Lens | |
| Objective lens | 35mm, F1.0 |
| Field of view | 11.8° x 7.1° |
| FOV at 100 m | 21 x 12 m |
| Magnification | 3x to 24x |
| Detection range | 1800 m |
| Focus | Manual |
| Display | |
| Display | 0.49 inch AMOLED, 1920 x 1080 |
| Colour palettes | White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia |
| Eyepiece | Eye relief 48 mm, diopter -5 to +5 |
| Reticles | 10 reticles, 5 colours |
| Picture-in-picture | Yes |
| Hardware | |
| Wi-Fi | 2.4 GHz and 5 GHz |
| Interface | USB-C (charge and USB 2.0) |
| Tube diameter | 30 mm |
| Other | Microphone, Bluetooth |
| System | |
| Recording | Photo and video with audio |
| Storage | 128GB |
| Power | |
| Battery | 18500 x1 built-in and 18650 x1 replaceable |
| Run time | Up to 12 hours |
| Environmental | |
| Operating temperature | -20°C to 50°C |
| Recoil | .300 Win Mag |
| Shock | 6000 J / 1200 G |
| Waterproof | IP68 |
| Physical | |
| Weight | 815 g |
| In the box | Scope, lens cover, eye cup, carry bag, 18650 battery x2, battery charger, 5V 2A adapter, USB-A to USB-C cable, quick start guide, warranty card |
Choose Guide TU Models
| (k) Guide TU Models 2027 | TU635 3.0 18mk – 3x – 640px – 1800m – Guide |
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Popular Unimounts + Rings + Quick Detach 2026
| Mount Brand | Burris, Darnox, Magne-Tech, SPUHR, Warne |
|---|---|
| Tube Size | 30mm Tube |
| Mount Models | Burris AR-PEPR – 30mm Tube – 40mm Height – 50mm Cantilever, Darnox 7075 Rings – 30mm Tube – 32mm Height – 0 MOA, Darnox 7075 Rings – 30mm Tube – 37mm Height – 0 MOA, Darnox ObsidianOne – 30mm Tube – 38mm High – 50mm Cantilever – 0 MOA, Magne-Tech 30mm Tube – TOP PART ONLY – 38.5mm high, (Part B), Magne-Tech BASE ONLY goes to picatinny rail (Part A), Magne-Tech FULL KIT – 30mm Tube – 38.5mm Height, SPUHR – QDP-3002 – 30mm Tube – 38mm Height – 0 MOA, SPUHR – QDP-3006 – 30mm Tube – 34mm Height – 0 MOA, SPUHR – QDP-3016 – 30mm Tube – 38mm Height – 0 MOA – 40mm Offset, SPUHR – QDP-3046 – 30mm Tube – 34mm Height – 0 MOA – 40mm Cantilever (recommended for Thermal), Warne XSKEL QD – 30mm Tube – 36mm Height – 0 MOA – 40mm Cantilever |
Quality Picatinny Rails
| Rifle Brand | Anschutz, Bergara BMR steel, Bergara Premier, Brno, Browning, CZ, Howa, Kimber, Lithgow, Marlin, Other / I Need Help, Remington, Ruger, SAKO, Sauer, Savage, Steyr, Tikka, UTG / Uni Dovetail, Weatherby, Winchester |
|---|---|
| Picatinny Rail | 11mm Dovetail to Picatinny Adapter – 145mm Long – MNT-ADP1102 CCOP, 12mm – 145mm Long – Dovetail to Picatinny Adapter – MNT-ADP1102 CCOP, 3/8 – 9.5mm – 125mm Long Dovetail to Picatinny Adapter – WODG048 CCOP, 3/8 Dovetail to Picatinny Adapter – 90mm – D0012 CCOP, 5/8 – 16mm – 145mm Long – Dovetail to Picatinny Adapter – MNT-ADP85002 CCOP, A-Bolt LA 0 MOA 43100 EGW, A-Bolt SA 0 MOA 43000 EGW, AC Howa 1500 Mini Action, Anschutz 11mm – 1450, 1451, 1415, 1416, 1418, 1420, Model 64 / Match 64, 1710, 1712, Model 54 / Match 54, 1761, 1903, 1907, 1913 – MNT-ADP1102 – CCOP, Anschutz 54 Action, 54.18, 1710, 1712 – Talley, Armacore Ruger, LA M77, M77 MKII, Hawkeye, Armacore Ruger, SA M77, M77 MKII, Hawkeye, Armacore Tikka T3, T3x, 0 MOA Australian Made, ATP Howa 1500 SA MOA, ATP Lithgow LA101 RH MOA, ATP Lithgow LA102, LA105, 0 MOA, ATP Remington 700 SA MOA, ATP Tikka M55 Black MOA, ATP Tikka T1x RH 0 MOA, Bergara BMR steel, Contessa SAKO 85 M PH13 – 75 IV, MA 05 M, L691, TRG-S M995, Contessa SAKO 85 S-SM PH12, CONTESSA SAKO 90, S90, SK90, S20/CZ 600 0 MOA – Picatinny on Picatinny, Contessa SAKO XS 85, 75 I, MA 05 XS, L461 Vixen, S491 – PH31 Standard, CZ 11mm Dovetail 452, 453, 455, 511, 512, 515 – 0 MOA – EGW HD 80910 [ejection slot], CZ 3/8 dovetail 452, 453, 455, 511, 512, 515 – 0 MOA – EGW HD 80900 [ejection slot], CZ 452 / 455 / Brno newer Model 2, 2E – 3/8' (11mm) – MNTCZ455 – CCOP, CZ 452 EURO / CZ 455 / CZ 512 / CZ 513 Rimfire – 11mm Dovetail – TLP0025008 – Talley, CZ 527 / OLD Brno 1 and 2 – 5 / 8 (16mm) Dovetail – MNTCZ527 – CCOP, CZ 527 American 16mm Picatinny Rail – 0 MOA – 80928 EGW HD, CZ 550 / CZ 557 / BRNO ZKK 600 / ZG-47 – Standard / Medium Action – 19mm Dovetail – 80914 – HD EGW, DN CZ 457, DN Sako S 85, 75 III, MA 05 S, L579 Forester, M591, VL63 Finnwolf, DN Sako XS 85, 75 I, MA 05 XS, L461 Vixen, S491, EGW HD Howa 1500/Weatherby Vanguard SA 81040, EGW HD Remington 700 SA 80000, EGW Savage Edge/Axis 41800, EGW Savage Flat Back SA 41200, EGW Savage Round Back SA 41000, EGW Winchester 70 SA 42000, Enter CZ Model In Notes Below, Kimber LA 84 (84L) – HD – 0 MOA (Center Spread 3.88″) EGW 81013, Kimber LA 8400 (8400 Magnum) 0 MOA (Center Spread 4.325″) HD EGW 81003, Kimber SA 84 (84M) – HD – 0 MOA (Center Spread 3.352″) EGW #81010, Kimber SA 8400 (8400 WSM) – HD – 0 MOA (Center Spread 3.678″) EGW #81000, LA HD Rem 700, 721, 725, Sauer 100, 101 – 0 MOA – 50100 – Center Spread: 4.485 – EGW, LA LW Rem 700, 721, 725, Sauer 100, 101 0 MOA – 40100 – Center Spread: 4.485 – EGW, LA Mark V (9 lug) HD Weatherby 80700 EGW, LA Ruger American – 0 MOA 7685M Warne, LA Ruger M77 MNT MKII LAUH – RUGM77MK2LAUH – CCOP, LA Sauer 100 / REM 700 M674M Warne, LA X-BOLT BRNT – 0 MOA 7642BB Warne, LA101 0 MOA Lithgow DN, Low 3/8 Wedge / 12.7-13mm on top – Dovetail to Picatinny Adapter – 145mm Long – MNT-ADP83002 CCOP, Magnum Action – CZ 550, BRNO ZKK 602 – 19mm Dovetail – 80920 – HD EGW, Mark VTRR (6 lug Bolt) HD Weatherby O MOA 80710 EGW, Marlin XT-17, XT-22 982, 917 – AC, Mini Action Howa / 1500 – 0 MOA 7656M Warne, Other / I'm Not Sure, Remington 783 LA 0 MOA, Remington 783 SA 0 MOA, Ruger 10-22 NON-Takedown – 46100 EGW, Ruger American 10-22 – PBRUG001 CCOP, SA Ruger M77 MNT MKII LAUH – RUGM77MK2SAUH – CCOP, SA Sako A7 0 MOA Talley, SA Steyr SBS Pro Hunter / Pro Varmint- 0 MOA (Center Spread 2.44″) – 81070 – EGW, SA Winchester 70 – Arctic, SA XPR Winchester 70 – Arctic, Sako 85 XS PH31 NV 0 MOA – Contessa, Sako 90 M/L Suits Bavarian, Hunter – PH109 Contessa, Sako 90 S Suits Bavarian, Hunter – PH108 Contessa, Sako 90 XS Suits Bavarian, Hunter – PH111 Contessa, Sako S20, CZ 600 Saphire / Helix 0 MOA PH70 – Contessa, Savage B Mag, Heavy Barrel, WSM, 0 MOA, BLK – 41970 EWG, Spuhr R-7001 Remington 700 SA 0MIL, Spuhr R-7011 Remington 700 LA 0MIL, SSA X-Bolt 7640M 0 MOA Warne, Tikka T3 / T3X 0 MOA – DN, Tikka T3 0 MOA – 44000 EGW, Tikka T3, T3x 0 MOA 76T3M Warne, UTG 9-11mm -100mm long Dovetail to Picatinny 9 slot, UTG 9-11mm Dovetail to Picatinny 14 slot 50mm cantilever, Warne HS Precision 700 SA Mountain Tech Tactical Rail, 8-40 / 6-48 – Bergara Premier – 7671M, Warne SA Mountain Tech Tactical Rail, Burnt Bronze – Remington – 7673BB, X-BOLT LA 0 MOA, X-BOLT SA 0 MOA |
Add a quality Picatinny Rail
| Rifle Brand | Anschutz, Bergara BMR steel, Bergara Premier, Brno, Browning, CZ, Howa, Kimber, Lithgow, Marlin, Other / I Need Help, Remington, Ruger, SAKO, Sauer, Savage, Steyr, Tikka, UTG / Uni Dovetail, Weatherby, Winchester |
|---|---|
| Picatinny Rail | 11mm Dovetail to Picatinny Adapter – 145mm Long – MNT-ADP1102 CCOP, 12mm – 145mm Long – Dovetail to Picatinny Adapter – MNT-ADP1102 CCOP, 3/8 – 9.5mm – 125mm Long Dovetail to Picatinny Adapter – WODG048 CCOP, 3/8 Dovetail to Picatinny Adapter – 90mm – D0012 CCOP, 5/8 – 16mm – 145mm Long – Dovetail to Picatinny Adapter – MNT-ADP85002 CCOP, A-Bolt LA 0 MOA 43100 EGW, A-Bolt SA 0 MOA 43000 EGW, AC Howa 1500 Mini Action, Anschutz 11mm – 1450, 1451, 1415, 1416, 1418, 1420, Model 64 / Match 64, 1710, 1712, Model 54 / Match 54, 1761, 1903, 1907, 1913 – MNT-ADP1102 – CCOP, Anschutz 54 Action, 54.18, 1710, 1712 – Talley, Armacore Ruger, LA M77, M77 MKII, Hawkeye, Armacore Ruger, SA M77, M77 MKII, Hawkeye, Armacore Tikka T3, T3x, 0 MOA Australian Made, ATP Howa 1500 SA MOA, ATP Lithgow LA101 RH MOA, ATP Lithgow LA102, LA105, 0 MOA, ATP Remington 700 SA MOA, ATP Tikka M55 Black MOA, ATP Tikka T1x RH 0 MOA, Bergara BMR steel, Contessa SAKO 85 M PH13 – 75 IV, MA 05 M, L691, TRG-S M995, Contessa SAKO 85 S-SM PH12, CONTESSA SAKO 90, S90, SK90, S20/CZ 600 0 MOA – Picatinny on Picatinny, Contessa SAKO XS 85, 75 I, MA 05 XS, L461 Vixen, S491 – PH31 Standard, CZ 11mm Dovetail 452, 453, 455, 511, 512, 515 – 0 MOA – EGW HD 80910 [ejection slot], CZ 3/8 dovetail 452, 453, 455, 511, 512, 515 – 0 MOA – EGW HD 80900 [ejection slot], CZ 452 / 455 / Brno newer Model 2, 2E – 3/8' (11mm) – MNTCZ455 – CCOP, CZ 452 EURO / CZ 455 / CZ 512 / CZ 513 Rimfire – 11mm Dovetail – TLP0025008 – Talley, CZ 527 / OLD Brno 1 and 2 – 5 / 8 (16mm) Dovetail – MNTCZ527 – CCOP, CZ 527 American 16mm Picatinny Rail – 0 MOA – 80928 EGW HD, CZ 550 / CZ 557 / BRNO ZKK 600 / ZG-47 – Standard / Medium Action – 19mm Dovetail – 80914 – HD EGW, DN CZ 457, DN Sako S 85, 75 III, MA 05 S, L579 Forester, M591, VL63 Finnwolf, DN Sako XS 85, 75 I, MA 05 XS, L461 Vixen, S491, EGW HD Howa 1500/Weatherby Vanguard SA 81040, EGW HD Remington 700 SA 80000, EGW Savage Edge/Axis 41800, EGW Savage Flat Back SA 41200, EGW Savage Round Back SA 41000, EGW Winchester 70 SA 42000, Enter CZ Model In Notes Below, Kimber LA 84 (84L) – HD – 0 MOA (Center Spread 3.88″) EGW 81013, Kimber LA 8400 (8400 Magnum) 0 MOA (Center Spread 4.325″) HD EGW 81003, Kimber SA 84 (84M) – HD – 0 MOA (Center Spread 3.352″) EGW #81010, Kimber SA 8400 (8400 WSM) – HD – 0 MOA (Center Spread 3.678″) EGW #81000, LA HD Rem 700, 721, 725, Sauer 100, 101 – 0 MOA – 50100 – Center Spread: 4.485 – EGW, LA LW Rem 700, 721, 725, Sauer 100, 101 0 MOA – 40100 – Center Spread: 4.485 – EGW, LA Mark V (9 lug) HD Weatherby 80700 EGW, LA Ruger American – 0 MOA 7685M Warne, LA Ruger M77 MNT MKII LAUH – RUGM77MK2LAUH – CCOP, LA Sauer 100 / REM 700 M674M Warne, LA X-BOLT BRNT – 0 MOA 7642BB Warne, LA101 0 MOA Lithgow DN, Low 3/8 Wedge / 12.7-13mm on top – Dovetail to Picatinny Adapter – 145mm Long – MNT-ADP83002 CCOP, Magnum Action – CZ 550, BRNO ZKK 602 – 19mm Dovetail – 80920 – HD EGW, Mark VTRR (6 lug Bolt) HD Weatherby O MOA 80710 EGW, Marlin XT-17, XT-22 982, 917 – AC, Mini Action Howa / 1500 – 0 MOA 7656M Warne, Other / I'm Not Sure, Remington 783 LA 0 MOA, Remington 783 SA 0 MOA, Ruger 10-22 NON-Takedown – 46100 EGW, Ruger American 10-22 – PBRUG001 CCOP, SA Ruger M77 MNT MKII LAUH – RUGM77MK2SAUH – CCOP, SA Sako A7 0 MOA Talley, SA Steyr SBS Pro Hunter / Pro Varmint- 0 MOA (Center Spread 2.44″) – 81070 – EGW, SA Winchester 70 – Arctic, SA XPR Winchester 70 – Arctic, Sako 85 XS PH31 NV 0 MOA – Contessa, Sako 90 M/L Suits Bavarian, Hunter – PH109 Contessa, Sako 90 S Suits Bavarian, Hunter – PH108 Contessa, Sako 90 XS Suits Bavarian, Hunter – PH111 Contessa, Sako S20, CZ 600 Saphire / Helix 0 MOA PH70 – Contessa, Savage B Mag, Heavy Barrel, WSM, 0 MOA, BLK – 41970 EWG, Spuhr R-7001 Remington 700 SA 0MIL, Spuhr R-7011 Remington 700 LA 0MIL, SSA X-Bolt 7640M 0 MOA Warne, Tikka T3 / T3X 0 MOA – DN, Tikka T3 0 MOA – 44000 EGW, Tikka T3, T3x 0 MOA 76T3M Warne, UTG 9-11mm -100mm long Dovetail to Picatinny 9 slot, UTG 9-11mm Dovetail to Picatinny 14 slot 50mm cantilever, Warne HS Precision 700 SA Mountain Tech Tactical Rail, 8-40 / 6-48 – Bergara Premier – 7671M, Warne SA Mountain Tech Tactical Rail, Burnt Bronze – Remington – 7673BB, X-BOLT LA 0 MOA, X-BOLT SA 0 MOA |
ADM American Defense - Quick Detach Mount
| American Defense Series | DELTA, RECON |
|---|---|
| Tube Size | 25mm Tube, 30mm Tube, 34mm Tube |
| Mount Height | 27mm, 29mm, 34mm, 35mm, 38mm, 39mm, 43mm, 49mm |
| American Defense Mount Models | AD DELTA QD C STD – 30mm Tube – 38mm Height – 0 MOA – (50mm Cantilevered for better eye relief, AD DELTA QD C-H – 30mm Tube – 49mm Height – 0 MOA – (50mm offset for better eye relief), AD DELTA QD C-H STD – 30mm Tube – 49mm Height – 0 MOA, AD DELTA QD C-M – 30mm Tube – 43mm Height – 0 MOA – (50mm offset for better eye relief), AD DELTA QD RC-30-STD – 30mm Tube – 43mm Height – 0 MOA – (25mm offset for better eye relief) – Left Side Levers, AD DELTA QD RC-L-30-STD – 30mm Tube – 34.9mm Height – 0 MOA – (25mm offset for better eye relief), AD DELTA QD STD – 25mm Tube – 38mm Height – 0 MOA, AD DELTA QD STD – 30mm Tube – 38mm Height – 0 MOA, AD DELTA QD STD – 34mm Tube – 39mm Height – 0 MOA, AD Recon 30 STD QD – 30mm Tube – 38mm Height – 0 MOA – (50mm Cantilevered for better eye relief), AD Recon 30 STD QD – 25mm Tube – 34mm Height – 0 MOA – (50mm Cantilevered for better eye relief), AD Recon 30 STD QD – 34mm Tube – 39mm Height – 0 MOA – (50mm Cantilevered for better eye relief), AD Recon H QD STD – 30mm Tube – 49mm height – 0 MOA, AD Recon QD SL-30-STD – 25mm Tube – 27mm Height – 0 MOA, AD Recon S 30 STD QD – 30mm Tube – 37mm Height – 0 MOA, AD Recon S QD STD – 34mm Tube – 39mm Height – 0 MOA, AD Recon SL QD STD – 30mm Tube – 29mm Height – 0 MOA, AD Recon SL QD STD – 34mm Tube – 29mm Height – 0 MOA |
Zeroing Targets - Thermal + Day + Night Vision 2026
| Zeroing Targets | Pulsar Thermal + Day + Night Vision Zeroing Targets, Hikmicro Thermal + Day + Night Vision Zeroing Targets, Thermal Flashing Tape Roll Zeroing (Best Value) |
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