This is a classic, the Summicron 50mm 2 cams.
	Here you can see the two cams.
	First, remove the three black screws
	Now, lift the black shroud, better don't use the fingers, you could touch the lens by accident.
	Now it's easy to take it out.
	Unscrew the bayonet.
	And remove it.
	Search the small steel ball and save it in secure place.
	Since it is a two cams lens, these are identical, so we have to mark them and take a picture for the position.
	Now you can unscrew them.
	Store each cam with its own spacers, so we can replace them where they were.
	This is what was removed, cam number two had no spacers in this lens.
	Time for replace the small ball, add a little bit of special grease on it.
	Here is where the small ball belongs.
	Install the Leica-Pentax or the Leica-Nikon bayonet, the red dot in front the scale center for Pentax, and slightly to the right for Nikon.
	Summicron ready for Pentax, Sony Alpha or Nikon cameras.
Back to the Pentax page  Back to the Nikon page Back to the Sigma page Back to the Sony page