ASTRA OTX/HTX1600 Laser Rangefinder User Guide

ASTRA OTX/HTX1600 Laser Rangefinder

Specifications & Features

• Magnification   6X
• Objective Lens Diameter 21 mm
• Close Focus 6 yards
• Eye Relief   16 mm
• Exit Pupil 3.5 mm
• Field of View   31 .50 ft. at 1 00 yds.
• Water-Resistance Rating IPX4 (Water-Resistant)
• Lens Coating Multi Coated
• Housing Material   Composite with Rubber Armoring
• Dimensions   4″x 1.44″x 3.11″
• Total Wt. (including battery) 4.25 oz.
• Laser Type 905 nm Class 1 Eye-Safe
• Display Type   High Transmission LCD
• Range Response Time 0.1 seconds
• Battery Type   CR-2 3-volt Lithium
• Battery Life Approximately 10,000 Readings
• Laser Range (Reflective) 6-1,760 yds.
• Laser Range (Tree) 6-1,000 yds.
• Laser Range (Deer) 6-800 yds.
• Horizontal (Angle Corrected) Mode Yes
• Angle with Line of Sight Mode Yes
• Archery Mode Yes
• Gun Mode   Yes
• Golf Mode Yes
• SCAN Mode   Yes

What’s in the Box?

• 6 Power x 21 mm Laser Rangefinder Monocular
• Soft Premium Carry Case
• Microfiber Lens Cleaning Cloth
• Adjustable Neck-style Lanyard
• Astra Optix™ Decal Sticker
• CR-2 3-volt Lithium Battery (Battery Pre-Installed)
• Quick Start Guide

Your Rangefinder at a Glance

High Transmission LCD

Quick Start

1. Connect the Battery: Open the Battery Cover and remove the plastic insert from the top of the battery.

2. Turn on unit and Adjust Eyepiece Diopter Focus: Press the Power (Range) Button to turn on the rangefinder High Transmission LCD display.
   Turn the Eyepiece Diopter Focus until both the image in the field of view and Aiming Reticle are clear and focused.

3. Measuring Distance: Aim the Aiming Reticle on the object you want to range and press the Power Button to display the distance. Your unit factory default setting is the Horizontal (Angle Corrected) Mode.
   The Line of Sight (LOS) value is displayed at the top of the display for 2 seconds.
   The angle-corrected Horizontal Distance( ) value is displayed at the bottom of the display for up to 8 seconds or until you take a new measurement.

4. Menu Settings – Button Operation Summary

5. Menu Settings – Menu Operation Summary

  * Distance Units Selection
    * YIM
  * Standard Mode (Std)
    * Horizontal (Angle Corrected) with Line of Sight
    * Angle with Line of Sight
    * OFF (Only Line of Sight)
  * Archery Mode (ArCH)
  * Gun Mode
  * Golf Mode
2. Yards & Meters Selection: In the menu press the Power (Range) Button to cycle between Yards (Y) and Meters (M). Press the Mode Button to select.
3. Select the Operation Mode:  

Press the Power Button to cycle between Standard Mode (Std), Archery Mode (ArCH), Golf Mode or Gun Mode. When the selection you want to use is blinking, press the Mode Button to select your preferred mode.

4. Sub-Modes under Standard Mode: Press the Power Button to cycle between each sub-mode. Press the Mode Button to select.

Tips for Using Your Rangefinder

• Your laser rangefinder comes defaulted to the Horizontal (Angle Corrected) with Line of Sight distance mode. For archery or shooting, this mode will give you the angle-corrected shoot-at distance to use. For Archery only, use the Archery Mode
  (ArCH) if you prefer to only show the Horizontal (Angle Corrected) value without the Line of Sight distance.

• If you turn off your rangefinder, it will keep the last settings used.

• This rangefinder also has Angle with Line of Sight mode. In this mode, it will display the Line of Sight (LOS) value for 2 seconds at the top of the display followed by the Angle value at the bottom of the screen. Shooters can use this information to calculate holdover using a ballistics calculator.

• The Gun Mode is optimized so that the value displayed will be the farthest distance value of a group of targets that are within your field of view. This is good if you are trying to range a target through trees or other obstructions.

• If using this rangefinder on the golf course, choose the Golf Mode (GOLF). The Golf Mode will display the nearest distance value (Golf Flagstick) of a group of targets that are within your field of view.

• Under ideal conditions, your Astra Optix™ Laser Rangefinder can measure the distance of reflective objects out to 1,760 yds. It can also measure a deer out to 800 yds. The type of target you are ranging strongly impacts the maximum ranging distance.

• Shiny reflective objects such as metal buildings will range much better than
  less-reflective objects such as trees, animal fur, bushes or grass. Objects that are more dense, such as trees or rock, will range better than bushes or grass.
  Bright-colored objects normally range better than dark-coloured objects. Rain, fog, snow, bright sunny days and dusty days will reduce the overall ranging performance. Cloudy days without fog, snow, rain or dust blowing in the air provide the best-ranging conditions.

• Targets that have a flat surface 90° to the laser emitting from the laser rangefinder range better than targets that have a curved surface, or are positioned at an angle in relation to the emitted laser.

• If you have problems ranging your target, use the SCAN feature by holding down the Power Button to take continuous measurements. This can help you quickly range a hard to range target. Your rangefinder will display continuous readings, making it easier to locate your target’s distance.

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Warning

• Do not look directly at the sun with your rangefinder, as it could cause serious damage to your eyes.
• Do not aim the rangefinder at a person’s eyes and do not look into the objective-lens side of the product when you are pressing the power button.
• Keep out of reach of small children.
• Only use a CR2 3-volt battery and do not use any outside power source.
• Do not attempt to open or take apart your laser rangefinder, as this will void your lifetime warranty, may damage your product and could cause electric shock.
• Class 1 Laser Product. Product complies with IEC60825-1: Ed. 3: 2014-05 and 21CFR1040. 10/11.

We are here to help!
Don’t hesitate to reach out to us if you have any questions or concerns about your product. On behalf of the Astra Optix family, we want to thank you for your purchase and support.

www.astraoptix.com
contact@astraoptix.com

Download the full instruction manual at www.astraoptix.com.
For customer service support, email Contact@astraoptix.com

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