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Messa a fuoco / Compensazione diottrica
La regolazione della nitidezza su oggetti diffe-
rentemente distanti nei binocoli Leica Ultravid
avviene per mezzo della ghiera centrale di
messa a fuoco (4).
Per compensare i disturbi visivi individuali per
l'osservazione senza occhiali da vista si impie-
ga la ghiera delle diottrie (3), che normalmen-
te è bloccata (figura A). Per disaccoppiare le
due ghiere occorre estrarre la ghiera delle
diottrie (figura B). La ghiera centrale di messa
a fuoco a questo punto varia soltanto la niti-
dezza del sistema ottico sinistro, mentre la
ghiera delle diottrie soltanto quella del siste-
ma destro.
Mediante una delle due ghiere si potrà quindi
mettere a fuoco il rispettivo cannocchiale su
di un oggetto. Successivamente occorre met-
tere a fuoco il secondo cannocchiale median-
te l'altra ghiera ad una nitidezza ottimale.
L'ordine può essere a piacere. Premendo in
basso la ghiera delle diottrie viene memori-
zzato il valore impostato. Il valore rispettiva-
mente impostato può essere comodamente
letto nella scala di precisione.
54
A
B
3
4
17647 innen 18.05.2006 13:40 Uhr Seite 54
58


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