Hey guys,
I have some very basic questions regarding FA lenses.
I once had to partly disassemble a FA 50 1.4 lens; there were quite a few electronic components hidden inside, namely some microchips on a flexible board and a golden "brush" close to the focus scale (see e.g. this thread for many nice pictures of a disassembly made by another forum member:
https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/197889-fa50...djustment.html ).
What is this brush being used for? And the microchips?
I am a bit confused as in this disassembly blog post (
vjacesslav: SMC PENTAX FA 43mm 1.9 LIMITED DISASSEMBLE IN 37 PICTURES ) on a FA 43 1.9, I can see neither such a brush, nor microchips.
Do also A-lenses contain electronics other than the conducting pins in the lens mount?
Best regards!
rapfl