Supply of 25 4 mm Broadband Dielectric Mirror , 25 4 mm Broadband Dielectric Mirror 1 , 12 7 mm Broadband Dielectric Mirror , Plano Convex Lens of diameter 25 4 mm with focal length 300 mm , Plano Convex Lens of diameter 25 4 mm with focal length 500 mm , Plano Convex Lens of diameter 50 8 mm with focal length 100 mm , Plano Convex Lens of diameter 50 8 mm with focal length 200 mm , Positive Meniscus Lens of diameter 25 4 mm with focal length 100 mm , Positive Meniscus Lens of diameter 25 4 mm with focal length 300 mm , Achromatic doublet of diameter 25 4 mm with focal length 200 mm , 1 2 Matched Achromatic Pair f1 25 mm f2 50 mm , Mounted Prism Pair Mag 2 0 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 0 1 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 0 3 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 0 5 , 25 mm Mounted Absorptive ND Filter SM1-Threaded Mount Optical Density 0 7 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 0 9 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 1 3 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 2 0 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 4 0 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 6 0 , 25 mm Mounted Absorptive ND Filter SM1 Threaded Mount Optical Density 8 0 , 25 mm Bandpass Filter with Centre wavelength 780 nm and FWHM 10 nm , Spanner Wrench for SM1 Threaded Retaining Rings , Optical Component Threading Adapters with C Mount Threads , Positive 1951 USAF Resolution Test Targets , Negative 1951 USAF Resolution Test Targets , Laser viewing cards