DOCTER DOCTER®sport 8-25x50 - Manual (Page 11)

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The graticule adjustment is very sturdy, absolutely recoil-proof and waterproof even if the
protecting caps are not in place.
However, the protecting caps should always be screwed onto both domes following graticule
adjustments to avoid accidental changes to the settings.
Attention:
The regulation range for correcting the hit point is sufficiently dimensioned. Should, however
the graduation not suffice, we recommend you have your rifle with the rifle scope checked by
your gunsmith.
Setting the visual acuity
The visual acuity is adjusted by turning the rear eyepiece focussing knurl (4). A marksman’s
possible eye defect is then compensated when graticule and target stand out sharply. Eye
defect compensation of ±2.5 dioptres is possible.
With variable rifle scopes, adjusting the focus to your eyes should be done at the highest
magnification as due to the maximum resolution, this is the best position to evaluate the
visual acuity. The subsequent magnification change will not change the visual acuity setting.
Change of magnification
To change the magnification of your scope to suit shooting distance and light conditions,
simply turn the rubber-coated, knurled zoom ring (2) to the desired setting. The most
important magnification values (3) are engraved on the knurled ring. However, any
intermediate magnification (between the engraved numbers) can be used without loss of
image quality or visual acuity and absolutely unchanged hit point. The zoom ring is divided in
a non-linear manner, achieving an improved adaptation to the user’s sense of magnification.
Parallax adjustment
The optical system of the DOCTER ® sport 3-9x40 and 3 - 10 x 40 rifle scope is set ex- factory
to provide a parallax-free view at 100 yards (91.5 m). In general, most rifles with mounted
rifle scope are zeroed in at this distance.
With the DOCTER ® sport 4.5 - 14 x 40 and 8-25 x 50 rifle scopes, parallax compensation is
accomplished by adjusting the parallax ring (5). Thus, aiming errors are avoided even at long
ranges.
A specially adapted control cam and the regular graduation of the distance scale (6) make an
accurate adjustment to intermediate values possible.