The MidOpt 40/20 Scratch-Dig Standard

Most MidOpt filters are designed with a 40/20 scratch-dig ratio. What exactly does this mean in terms of your image results? Surface quality is important for optimal image results

Uniforce Sales and EngineeringMidOpt Filters - Uniforce Sales and Engineering

MidOpt PR120-27 Linear Polarizing Filter, Used to eliminate or greatly reduce glare, rotating linear polarizers offer maximum flexibility and ease of

PR120-27 Ultra High Contrast Linear Polarizing Filter (M27 x P0.5)

Midwest Optical ND120

Midwest Optical BN470

Midwest Optical BP590

Training Archive

Midwest Optical LP590

NIST Traceable Scratch Dig Standards

A Manufacturer and Designer of gaging, Imaged, Optical, and Calibration Products - Gage-Line Technology, Inc.

Training Archive

MidOpt PC052-82 Circular Polarizing Filter

Understanding Surface Quality: A Practical Guide, Test & Measurement