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Orange #21 glass filter in 3x4 inch rectangular form

Tiffen

Tiffen 3x4" Orange #21 Glass Filter camera accessory

SKU CH-54P4-SKQRC

An Orange #21 glass filter that boosts contrast and warm tones for black-and-white film photography

  • Dramatic tonal separation in black-and-white images with Orange #21 filter
  • High-clarity optical glass minimizes distortion for sharp photographs
  • Precise exposure control via 4× filter factor (+2 stops)
  • Scratch and dust protection from robust 3x4" glass construction
  • Reduced reflections and glare through multi-coated surface treatment

Black & white film contrast filter

The Tiffen Orange #21 glass filter is built for photographers shooting black and white film who want stronger tonal separation. It darkens blue skies and reduces atmospheric haze so clouds and distant detail stand out more clearly. The 3x4 inch size fits compatible filter holders used in studio and large-format work. It is not suited for digital sensors or colour film workflows.

Optical glass with multi-coated surfaces

The filter uses high-quality optical glass with a multi-coated coating that cuts reflections and glare. This construction keeps distortion to a minimum while protecting the front element of the lens from dust and scratches. The filter factor is 4, which equals a two-stop reduction in light reaching the film plane. Exposure must be increased accordingly or the negative will be under-exposed.

Filter factor 4 (+2 stops)

The +2 stop factor is the single number that decides whether this filter matches the scene and film speed you are using. If the lighting conditions or film ISO cannot accommodate two extra stops of exposure, the filter will produce underexposed frames. Photographers who need a lighter or heavier effect should choose a different filter factor.

Highlights

  • Dramatic tonal separation in black-and-white images with Orange #21 filter
  • High-clarity optical glass minimizes distortion for sharp photographs
  • Precise exposure control via 4× filter factor (+2 stops)
  • Scratch and dust protection from robust 3x4" glass construction
  • Reduced reflections and glare through multi-coated surface treatment

Specifications

No published specifications for this item yet.

Questions about this item

What does the #21 designation mean for black-and-white film work?

The #21 orange filter darkens blue skies and cuts atmospheric haze, giving stronger tonal separation in monochrome landscapes and portraits.

How does the +2 stop filter factor change exposure in camera?

The factor of 4 means you open the aperture two stops or double the shutter speed twice to keep the same exposure as without the filter.

What does the 3x4 inch size tell me about mounting options?

The 3x4 inch glass fits large-format filter holders or matte boxes that accept that rectangular format; it will not screw onto standard round lens threads.

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