through the sights of a Feinwerkbau LG700
photo shows the marksman-eye view of the target when using a 10 metre target air
rifle equipped with aperture sights and shot in the standing position. The large black
area is the end of the rearsight, so close to the eye (about 2-3 inches) that
no detail is in focus. The purpose of the rearsight is to centralise the eye
with the foresight, which is the larger black circle in the yellow aperture.
The yellow colour of the aperture is because the shooter is using a filter to
improve visual acuity, other popular colours are red and green (blue is not much
used). The reason for the six sided appearance of the aperture is that it is
made by an adjustable iris, so that its diameter can be altered to suit personal
preference. The smaller black circle in the centre of the foresight is the foresight element which is used to align the gun with the aiming mark on the target.
Notice that the gun is canted anti-clockwise and that the foresight has a
adjustable bar that can be turned to the horizontal position, so as to
consistently judge the right degree of cant to be used. In the very centre of
the sights is the
aiming mark, the tiny grey / black spot. In the centre of this
aiming mark is the "10", just ½ millimetre in diameter, so small in fact that it
cannot be seen from 10 metres distance.
that these sights are used, is that the marksman looks through the rearsight
(not at it), then focuses on the foresight element (not the aiming mark) and
centres the aiming mark in the foresight element, which is in turn centred in
the rearsight. These sights are only intended for precision target shooting,
they would be useless for hunting or military work. The gun used to provide the
illustration below was a
Feinwerkbau LG700 (compressed) air
rifle, but the same principle applies to all competitive shooting to ISSF rules
done by 10 metre airguns and all 25 yard / 50 metre .22 rimfire rifles shot from
either the prone, kneeling or standing position, using aperture sights.
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