i recently have bought a canon f-1 from a thrift shop where it was exposed to dust and sun. the shutter mechanism works correctly (it is not jammed, but i don't know if it has the correct speed or not) when you set the speed to 60 or higher. Below that, the shutter stays open and the mirror stays up.
to unblock the situation i have to either change the speed to 60 or higher or wind again. i am new to photography and is saw in many forums that this is not supposed to happen.
it's battery is dead
i don't know which F-1 version this is, maybe these pictures can help to identify it:
is it a problem ? is it because of the battery ? can i solve this problem ? and how ?