Isotta ALPHA 7R/S II, Инструкция по эксплуатации

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17
Optional
ZOOM or
FOCUS GEAR
(optional)
PORT
Bayonet
N.B.
The portholes must be replaced in the open air.
Do not leave the porthole mounted for a long period of time. Use preferably Isotta ports
for maximum performance of the housing. Do not use solvents on the port.
To clean them you should use a microfiber cloth. If necessary, you can use mild soap
only on the external side.