Tiffen 62mm Red 1 (25) Camera Lens Filter. 

It is designed for photography, particularly for use with black and white film or digital photography to create specific effects. Key features and uses include: 

Contrast Enhancement: It darkens skies and water in black and white images, enhancing cloud contrast in landscapes. 

Simulated Night Scenes: Can be used to simulate a moonlit scene during the day with slight underexposure. 

Infrared Photography: When used with infrared film, it produces extreme contrast in skies, turns foliage white, and helps cut through fog and haze. 

Dramatic Effects: Ideal for landscape, nature, and architectural photography to add drama and contrast.

Lenses like the Pentax SMC DA 18-135mm F/3.5-5.6 ED AL (IF) DC WR Lens, which has 62mm front filter threads, are compatible with this filter.