50.8 x 50.8

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2″ x 2″ Green Optical Cast Plastic Filter

2″ x 2″ Red Optical Cast Plastic Filter

2″ x 2″, Optical Cast Plastic IR Longpass Filter

2″ x 2″ Blue Optical Cast Plastic Filter

50.8 x 50.8mm Left-Handed Circular Polarizing Film (CP42HE)

50.8 x 50.8mm Right-Handed Circular Polarizing Film (CP42HER)

SCHOTT BG42, 50.8mm Sq., 3mm Thick, Colored Glass Bandpass Filter

50.8 x 50.8mm, 4-6λ Mirror

50.8 x 50.8mm Enhanced Aluminum, 4-6λ Mirror

50.8 x 50.8mm Protected Silver, 4-6λ Mirror

SCHOTT N-WG-280, 50.8mm Sq., 3mm Thick, Colored Glass Longpass Filter

SCHOTT RG-645, 50.8mm Sq., 3mm Thick, Colored Glass Longpass Filter

50.8 x 50.8mm Protected Gold, 4-6λ Mirror

Hoya IR85N (850nm), 50.8mm Sq., 1mm Thick, Colored Glass Longpass Filter

Hoya L39 (390nm), 50.8mm Sq., 1mm Thick, Colored Glass Longpass Filter

Hoya R62 (620nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter

Hoya RM100 (1000nm), 50.8mm Sq., 1mm Thick, Colored Glass Longpass Filter

Hoya UV28N (280nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter

Hoya UV32N (320nm), 50.8mm Sq., 1mm Thick, Colored Glass Longpass Filter

Hoya Y44 (440nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter

Hoya Y52 (520nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter

Hoya IR80N (800nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter

Hoya IR85N (850nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter

Hoya L37 (370nm), 50.8mm Sq., 2.5mm Thick, Colored Glass Longpass Filter