Opto Sigma

• Convenient selection of ND filters from 0 to 3.0 OD
• Detent indexing for fast and easy positioning
• Pre-mounted filters reduce contamination from handling
• Double and single wheels for improved versatility

Our new indexed filter wheels contain a set of neutral density filters. These pre-mounted filters are available in complete 2-wheel or starter 1-wheel versions. Each filter wheel holds six, 1 inch (25mm) filters and is mechanically indexed with detents for ease of adjustment.

The 2-wheel version contains 10 filters of optical density 0.10, 0.22, 0.30, 0.40, 0.52, 1.00, 1.50, 2.00, 2.50. One space in each wheel is intentionally left empty so that the two filter wheels may be adjusted to provide optical densities from 0.0 to 3.0 in 0.1 increments. The 1-wheel version comes with 5 filters that allow for variation in optical density of 0 to 0.5 in 0.1 OD increments.

Both ND filter wheels may be configured conveniently to provide zero attenuation without removing the mount from your beam path. These filter wheels are also available without ND filters and may be used to hold spectral filters or plate beam splitters.