ECU emulator chip for old manual lenses

Well if you fit this the only thing you have to do is focus ..all other functions in PSA are eletronic......you can even set back focus on a camera that does not normally allow it !!

Buy it at for $30

EURO AF Confirm Metering Emulator Chip for Nikon DSLR D5100 D90 on Lens AIS AI | eBay

best instructions at

Adding a CPU to MF Nikkor lenses

DONT TRY IT IF YOU NOT GOOD WITH SMALL SCREWS .HACKSAW AND NEEDLE FILE AND YOU NEED THE RIGHT CAMERA TO PROGRAMME IT .(D7000 OK )

here is a Nikon 35mm F2,5 E lens ready for paint

Hmm, now I see what you were saying in that other thread. Nifty, although indeed an emulation.