If you own an older camera with thread mount, it will probably accept the PENTAX Universal Thread Mount T-Ring. If you have a new camera with a bayonet mount not listed above (Ricoh, Cosina, Zenith, etc.), it most likely accepts the Pentax K-Universal Bayonet Mount T-Ring. Check your cameras instruction manual for more detail.Wide 48mm T-ring supports full 35mm format Nikon Canon EOS cameras, Couples camera body to wide 48mm T-thread on Orion focal reducers for ED80 and ED100 refractor telescopes, For use with 48mm wide-format T-threaded accessories. Not compatible with standard (42mm) T-threaded accessories.

If you own an older camera with thread mount, it will probably accept the PENTAX Universal Thread Mount T-Ring. If you have a new camera with a bayonet mount not listed above (Ricoh, Cosina, Zenith, etc.), it most likely accepts the Pentax K-Universal Bayonet Mount T-Ring. Check your cameras instruction manual for more detail.Wide 48mm T-ring supports full 35mm format Nikon Canon EOS cameras, Couples camera body to wide 48mm T-thread on Orion focal reducers for ED80 and ED100 refractor telescopes, For use with 48mm wide-format T-threaded accessories. Not compatible with standard (42mm) T-threaded accessories.