View source for OTQNO

[[File:OTQNO.jpg|250px]]
*'''Production era''' - 1959-1983
*'''Code number''' - 16468
*'''Type''' - Visoflex ring addapter used with [[OUAGO]] and [[90mm f/4 Elmar]] or [[Elmar (II) f= 9 cm 1:4]] lens head to extend the close focus range:
**One x OTQNO = 2 feet - EF = 1.5 x
**Two x OTQNO = a little under 20 inches (shown ghosted) - EF = 1.7 x
*'''Compatibility''' - Note: 90 Elmar lens heads above serial 1572401 are suitable for Visoflex use without modification. Lenses from 697901-1572400 require factory adjustment and below 697900 are suitable but may not reach infinity without adjustment.
*'''Source'''
**[http://www.cameramanuals.org/leica_pdf/leica_accessory_guide.pdf Dennis Laney's Leica Accessory Guide (1st edition) pgs 49-50] courtesy of Mike Butkus