Originally posted by shyrsio The tube is totally manual, not a single contact on the mount.
I just checked a plastic mount lens, the da L 18-50 and it does have a bronze contact plate on the inner side, so i guess i will have to file off the coating in certain places.
If the tube doesn't have contacts the camera will not communicate with the lens.
In this situation you will need to use a lens that you can manually set the aperture. I doubt the dal 18-50 has an aperture ring. Without that you will be at the widest aperture, the depth of field is going to be thin.
You will want to use the green button to meter. Search green button or stop down metering for settings and instructions
I would not take a file to the lens