Anyone out there help an idiot ??just been given a Seben ref: N76/700/3998 and realise its rubbish but being an engineer , before I look for something better,need to know why this one does not work>>>>
when looking through the viewing tube without the lens ,I can see the reflection of my own eye, this indicates to me that the reflecter and prism
are in place however, when viewing with lens in place the view is blank.
All I can think of with my limited knowledge ,is that there should also be a lens on the front where I have a plastic plug, the centre of which has a of 40mm dia and at the rear of this, a a recess of 48mm x 7mm depth
should a lens be in place here ? if so ,what should I be looking for? if not can someone enlighten me as to cause :
