a manual for the amateur and professional, covering the field of miniature camera photography Willard Detering ... Prepare the 21mm lens for mounting by sliding its curved locking knob against the direction of the red arrow on the knob andanbsp;...
|Title||:||The Leica manual|
|Author||:||Willard Detering Morgan, Henry M. Lester|
|Publisher||:||Morgan & Morgan, Inc. - 1955|