DE series C-mount Adapters for Nikon E-series non-ISO 38mm Photoports

C-mount adapters for Nikon non-ISO 38mm Photoports which are now standard for Nikon Biological trinocular heads (Eclipse E200 / E400 etc).  NOTE:  Older Nikon microscopes frequently have ISO 38mm photoports - same internal diameter, but longer tubes.  ISO photoports require these adapters...
Available in 0.5x, 0.63x and 1x magnifications.