MDSLR-AO 1.38x Widefield T-mount adapter for AO 10 & 110 Photoports

Martin 1.38x Widefield DSLR T-mount Adapter for American Optical (AO) series 10 & 110 28mm ID photoports.  Includes T2 adapter for Canon EOS or Nikon.

Provides the widest field-of-view without vignetting for APS-C sensor DSLR cameras.