AAton XTRprod User's Guide download pdf (Page 22)

the hyperlong ﬁnder, which is twice as long as the standard

extension ﬁnder, can be used.

Note that standard short eyepiece can now be equipped with a

heating system; in order to avoid any condensation on the eyepiece

lens. Aaton can provide you a heating lens and the corresponding

Amph9 cable.

2.2.2 Attaching the Extension Finder

In order to use an extension ﬁnder on the XTRprod, the standard

eyepiece must ﬁrst be removed. To remove the eyepiece, locate the

eyepiece lock ring, marked A in the photo below. Rotate counter-

clockwise and gently pull off the eyepiece. To install the extension

ﬁnder, locate the protruding guide pin on the seat of the viewﬁnder

and align the pin with the hole in the ﬂange of the ﬁnder. Mate the

ﬂange to the seat of the viewﬁnder and tighten the lock ring until it

is set ﬁrmly in place. During this procedure, you will notice that the

extension ﬁnder needs to face 180° away from the operator’s eye to

be installed onto the viewﬁnder. Because of its optical construction,

this is completely normal. After installation, rotate the ﬁnder 180°

to regular viewing position.

2.2.3 Viewﬁnder Tension Adjustments

The large knurled knob at the base of the left/right lateral

movement point (b) locks the lateral positioning.

The friction adjusting ring, located behind the eyepiece lock ring,

can be used to adjust the tension of the eyepiece swivel, depending

on the operator’s preference and the viewﬁnder being used. When

using the standard eyepiece, tension should be relatively light to

allow for movement with a moderate amount of pressure. When

using the standard extension ﬁnder, tension should be increased to

hold the additional weight of this ﬁnder in place.

To adjust the tension of the swivel, loosen the steel knurled screw (c)

located on the friction adjusting ring. Hold the eyepiece in place,

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AAton XTRprod User's Guide Page 22