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Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

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Dear Customer!

Congratulation and thank you for purchasing this
professional competition K product from KAHLES!
Before using it for the first time, please read this
information carefully.

All specific technical data and reticle drawings
of the KAHLES K products are available online at
www.kahles.at.

If you have any further questions, please contact
your authorized KAHLES dealer, gunsmith or contact
our support team directly.

Your KAHLES Team

1. Operating Adjustment

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

1 – Diopter compensation ring

2 – Magnification ring

3 – Parallax adjustment wheel

4 – Illumination control

5 – Elevation adjustment turret

6 – Windage adjustment turret

7 – Rotation indicator pin

8 – Battery cover

2. Use and Mounting

KAHLES rifle scopes are waterproof and extremely durable. Nevertheless, careful handling is advised, especially around the turrets. Please protect your rifle scope against excessive impact and abuse.

To ensure proper function and performance use a professional gunsmith to mount your KAHLES rifle scope. Ensure maximum eye relief is achieved. Please read all safety instructions before use.

3. Safety instructions

  • Never look directly into the sun or any other intense light through your rifle scope
  • Please protect your rifle scope from excessive solar radiation and heat
  • Please note the eye relief distance specified for properly mounting the rifle scope
  • All repairs must be performed by KAHLES
  • The rifle scope must be mounted by professional gunsmith
  • Attention – the screws of mounts shall in no case be tightened stronger than max. 240 Ncm
  • Always check carefully and be certain that your firearm is unloaded before undertaking any work upon it

4. Mechanical center

The reticle has been factory-set to optical center. If you need to reset, follow these steps:

  1. Turn the elevation or windage adjustment until it stops (do not force).
  2. Now turn the adjustment in the opposite direction while counting the total number of clicks until it stops.
  3. Half of this total number of clicks is the optical center.
  4. Repeat this procedure for the second adjustment turret.

Pay attention, never use any strong force when you do any adjustments on the turrets. 

5. Diopter and Parallax adjustment

  • Turn the diopter compensation ring (1) until you get a sharp reticle image
  • Turn the parallax adjustment wheel (3) until you achieve a sharp image and the reticle does not move on the target due to head placement.
  • Magnification ring (2) turn to increase or decrease magnification 
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

6. Sighting in the rifle scope

After the rifle scope has been properly mounted and bore sighted by a professional gunsmith you will need to sight in your rifle and rifle scope. Attention – the screws of mounts shall in no case be tightened stronger than max. 240 Ncm! 

Sight in the rifle scope (on the shooting range) to your specific distance and desired point of impact by turning the elevation and windage adjustments to move the bullet impact to your desired point of impact. The direction of bullet impact is engraved on each adjustment. 

Once you have established the preferred point of impact on the target you will need to zero the elevation and windage adjustments. 

Expert mounting is required to ensure optimum performance. 

6.1 Zeroing the elevation and windage dial for K15i and K16i

If the point of impact of the bullet deviates from the aiming point, this can be easily and precisely corrected by adjusting the elevation and the windage turret of the rifle scope. To make adjustments, simply unscrew the screw-on caps of the elevation and windage turrets. 

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

The aim point correction per click can be taken from the information engraved on the elevation or windage adjustment turret of your rifle scope. 

Pay attention, never use any strong force when you do any adjustments on the turrets. 

6.1a Zero Point adjustment

Once you have aligned the scope to the rifle, you can retain this basic setting. The scale for this is located on the index disc of the elevation/windage adjustment turret. 

  1. Hold the turret with your fingers
  2. Use a coin or an empty cartridge case and turn the locking screw (1) in counter clockwise direction
  3. Loosen the locking screw till you get a free moving index disc (3)
  4. Turn the index disc/ring (3) until the zero point of the scale is aligned with the index point on the scope
  5. Hold the index disc/ring (3) and the turret disc (2) turn the locking screw clock wise in right direction. While performing this process you should hear no mechanical click. Your adjustment is now zeroed to your point of impact.
  6. Your adjustment is now zeroed to your point of impact.

Pay attention, never use any strong force when you do any adjustments on the turrets.

6.2 Zeroing the elevation dial for K312II, K312i and K624i

Using the supplied allen key, loosen the two set screws on the turret 1– 3 turns (do not remove the set screws completely) until you have a free moving turret without clicks. With the set screws loosened turn the elevation turret in the down direction (the direction of bullet impact is engraved on the adjustment) until it stops. This will be 3 or 4 marks below the zero mark on the dial. Turn the turret so that the zero on the dial lines up with the indicator mark on the body tube. Align the marks and using the short end of the supplied allen key tighten again the two set screws to approximately 1Nm or 8 inch pounds (do not exceed 1Nm or 8 inch pounds). 

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

Your elevation is now zeroed.

The mechanical (physical) stop will be about 3 or 4 clicks below zero. This allows adjustments slightly below zero for special conditions as increased temperature or closer targets. 

Pay attention, never use any strong force when you do any adjustments on the turrets. 

6.2a Zeroing the windage dial for K312II, K312i and K624i

With the rifle and scope sighted in to the desired point of impact loosen the two set screws on the windage adjustment dial 1– 3 turns (do not remove the set screws completely) and move the dial to align the zero mark to the indicator mark on the body tube. Using the short end of the supplied allen key, tight the two set screws to approximately 1Nm or 8 inch pounds (do not exceed 1Nm or 8 inch pounds). Your windage is now zeroed. 

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

Pay attention, never use any strong force when you do any adjustments on the turrets.

6.2b Reset to factory conditions (full elevation) for K312II, K312i and K624i

  1. Turn the elevation turret (5) in the up direction until you reach the mechanical stop.
  2. Use the supplied allen key to loosen the two set screws 1– 3 turns (do not remove the set screws completely) until you have a free moving turret without clicks.
  3. Now turn the elevation turret in the up direction until you reach the mechanical stop.
  4. Use the short end of the supplied allen key to tighten the two set screws to approximately 1Nm or 8 inch pounds (do not exceed 1Nm or 8 inch pounds).
  5. Turn the elevation turret in the down direction until you reach the mechanical stop.
  6. Use the supplied allen key to loosen the two set screws 1– 3 turns (do not remove the set screws completely) until you have a free moving turret without clicks.
  7. Now turn the elevation turret in the down direction until you reach the mechanical stop.
  8. Use the short end of the supplied allen key to tighten the two set screws to approximately 1Nm or 8 inch pounds (do not exceed 1Nm or 8 inch pounds).
  9. You have now deactivated the zero stop feature. Your rifle scope will now have full elevation travel.

Note: The mechanical (physical) stop will be about 3 or 4 clicks below zero. This allows adjustments slightly below zero for special conditions as increased temperature or closer targets.

Pay attention, never use any strong force when you do any adjustments on the turrets.

6.3 Zeroing the elevation dial for K1050/K1050i FT

Using the supplied allen key loosen the two set screws on the turret 1– 3 turns (do not remove the set screws completely) until you have a free moving turret without any clicks. With the set screws loosened turn the elevation turret in the down direction (the direction of bullet impact is engraved on the adjustment) so that the zero on the dial lines up with the indicator mark on the body tube. Align the marks and use the short end of the supplied allen key to tighten the two set screws to approximately 1Nm or 8 inch pounds (do not exceed 1Nm or 8 inch pounds). Your elevation is now zeroed. 

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

Pay attention, never use any strong force when you do any adjustments on the turrets.

6.3a Zeroing the windage dial for K1050/K1050i FT

With the rifle and scope sighted in to the desired point of impact loosen the two set screws on the windage adjustment dial 1– 3 turns (do not remove the set screws completely) and move the dial to align the zero mark to the indicator mark on the body tube. Using the short end of the supplied allen key, tighten the two set screws to approximately 1Nm or 8 inch pounds (do not exceed 1Nm or 8 inch pounds). Your windage is now zeroed. 

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

Pay attention, never use any strong force when you do any adjustments on the turrets.

7. Elevation and Windage adjustment

KAHLES rifle scopes incorporate fingertip, coin or empty cartridge case adjustable elevation and windage dials with mechanical and audible clicks. Each click moves the point of impact towards the direction which is engraved on the turrets.

7.1 K4i

If the point of impact of the bullet deviates from the aiming point, this can be easily and precisely corrected by adjusting the elevation and the windage turret. To make corrections, simply use the adjustment screw of the elevation or windage turret and turn the adjustment dial in the appropriate direction (up/down or left/right) as indicated by the displayed markings on the turrets. 

Pay attention, never use any strong force when you do any adjustments on the turrets. 

8. Rotation Indicator Pin

Double turn turret There are two rows of numbers (X) on the elevation adjustment. If the indicator pin (7) is flush to the top of the adjustment you are using the bottom row of numbers (first rotation). If the indicator pin is raised up, you are using the upper row of numbers (second rotation). 

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

Tripple turn turret

There are three rows of numbers (X) on the elevation adjustment. If the indicator pin (7) is flush to the top of the adjustment you are using the bottom row of numbers (first rotation). If the indicator pin is raised up about 1mm (red), you are using the middle row of numbers (second rotation). If the indicator pin is raised up about 2mm off the housing (white and red), the highest row of numbers (third rotation) is in use. 

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

9. Illumination

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

Most KAHLES rifle scopes are equipped with illuminated reticles. To switch on the reticle illumination turn the illumination switch towards clockwise direction. The illumination intensity will get brighter or lower by turning the adjustment switch greater or lesser. The adjustment can be turned in direction to the off point or to the desired intensity setting. The illumination is switched off when the indicator on the illumination adjustments allied with the off marking on the tube. All of our K-models have the automaticoff function of the reticle illumination integrated. If there will be no brightness adjustment over a period of about 2 hours, the reticle illumination automatically switches off. To restart the reticle illumination after the automatic-off is activated, you have to switch it completely off and on again. In any case to prevent depletion of the battery, turn off the reticle illumination when not in use. 

10. Replacing the Battery

The battery is stored in the illumination adjustment.

Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual
Kahles K4i, K15i, K16i, K312II, K312i, K624i, K1050, K1050i FT Rifle Scopes instruction manual

To change the battery:

1. Turn off the reticle illumi – nation. 

2. Hold the illumination adjustment from turning

3. Use a coin that fits the slot and turn counter clockwise until the cover is unscrewed 

4. Change the battery (CR2032) positive + side facing out

5. Reinstall the battery cover securely

Attention! Use only type CR 2032 batteries.

Some KAHLES K models contain inside the windage turret cap one spare battery.

Batteries Directive

Batteries must not be disposed of as household waste and you are legally obliged to return used batteries. Local facilities exist for returning used batteries free of charge (e.g. in retail outlets or at communal collection points). Batteries are labelled with a crossed-out wheeled bin and the chemical symbol of the harmful substance they contain: “Cd” for cadmium, “Hg” for mercury and “Pb” for lead. Please help us to protect the environment. 

11. Cleaning

We have designed all elements and surfaces to require very little care. 

KAHLES OILPHOBIC ™ lens coatings makes cleaning objective lenses and eyepiece lenses easy, especially when cleaning dried-on mineral deposits (e.g. water marks from condensation). To ensure the long-lasting optical quality of your rifle scope, you should keep the glass surfaces free from dirt, oil and grease. 

When cleaning the lenses, first remove larger particles with an optical lens brush. For subsequent thorough cleaning, breathe lightly on the lens and clean with the cleaning cloth. 

The metal parts are best cleaned with a soft, lens-cleaning cloth. 

Standard Accessory

The special KAHLES Lens-Cleaning cloth can be used to clean even the most sensitive glass surfaces. It is suitable for the objective and eyepiece lens. Please keep the microfiber cloth clean as dirt particles can damage the lens surface. If the cloth is dirty, it may be washed in lukewarm soapy water and allowed to dry naturally. Please use it exclusively for cleaning lens surfaces. 

12. Storage

We recommend to store the rifle scope in a dry place without excessive solar radiation and heat. If the rifle scope is wet it must be dried prior to storage. 

All details are typical values. We reserve the right to make changes regarding design and delivery. We accept no liability for printing errors. BA, 10/2014

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