I've had a 35mm f/1.4 Samyang lens for just over a week now. In that time I've taken around 100 shots with it and bayonetted it on and off the camera - carefully - no more than a dozen times. Yesterday I took the rear cap off the lens to use it and saw what I first thought was a bit of solder sitting in the rear cap. On closer inspection it looked like a very small silvery bullet, and with horror I realised it was one of the electrical contact "pips" off the lensmount. I looked into the small hole it had obviously come from and saw a small metal spring strip with a tiny hole in it. There appeared to be no bending, distortion or other sign of stress on either the spring strip or the contact pip. This made me curious about the security of the rest of the contacts and I gently wobbled them all in turn with the tip of my finger. As I did this another contact came loose and fell out! This, I believe, could be a generic factory fault with all CPU type Nikon-fit Samyang lenses. So I'd advise anyone who's recently bought a Nikon-fit "AE" type Samyang to check the electrical contacts on the lens. The symptoms of a bad one appear to be that the contact will wobble slightly from side-to-side in its recess. A springy up and down motion is normal, but having side-to-side play could indicate that the contact is insecure and likely to fall off. This isn't good for the lens (obviously) and if it dropped off inside your camera could do untold damage. If this proves to be a widespread fault then we should campaign Samyang to do a recall or arrange to fix the problem locally before someone's camera gets written off or the mirror gets damaged. This obviously doesn't apply to non-CPU type Samyangs or those in other camera fittings AFAIK. I'm attaching a drawing (couldn't be bothered to set up a macro picture for this tiny thing) of the offending detached contact pip.