Increasing contrast when working in black and white, this 4.5" Red 23A Filter from Tiffen is used to noticeably darken cool and blue tones in order to emphasized both shadows and clouds. Offering greater tonal separation than regular yellow and orange contrast filters, the light-red 23A is especially well-suited to producing dramatic outdoor and landscape imagery. There is an approximate 4x filter factor with this filter, requiring an increase of 2 stops for normal exposure.

The filter is constructed using Tiffen's ColorCore technology, which involves lamenting the filter material between two pieces of optical glass, grounding flat to a tolerance of 1/10,000th of an inch, and mounting within an aluminum alloy ring.

Increases Black and White Contrast    Effect Corresponds to Wratten 23A Filter    Darkens Blue Tones    Lightens Red and Orange Tones    Reduces Haze in Daylight    4x Filter Factor, +2 Stop    Optical Glass, ColorCore Technology    Aluminum Ring

Light-red filter provides the same effect as a Wratten 23A contrast filter, and helps to darken blue tones while lightening warm orange and red tones, when photographing in black and white.

Commonly used for landscape photography to emphasize and darken blue skies and give clouds more visual depth.

Filter factor of 4 requires approximately 2 stops of additional exposure to maintain normal results.

ColorCore technology, which permanently laminates the filter material between two pieces of optical glass, maintains image clarity, accuracy, and consistency.

Aluminum filter ring is both lightweight and durable.

Related Questions and Answers

Q: 1. Does the Brain has any warranty through RED?

A: This product has a one year, limited manufacturer's warranty.

Q: 2. Is the Red Armor available for the Raven kit? It is not listed under Warranties.

A: The warranty is now available. It is under the Accessories tabWarranties & Support. RED DIGITAL CINEMA RED Armor (EPIC-W Helium 8K S35 BRAIN) B&H # RERAEPCW

Q: 3. is this package ready to shoot out of the box?, do i need to add anything else?.

A: The items in this B&H Kit have been hand-picked to provide you with the bare essentials to put together a shootable RED RAVEN shooting package. Other accessories can always be added but this will get you up and running.

Q: 4. Is it a full frame sensor? if not what is the sensor size like suprt 35mm etc..

A: The RED DIGITAL CINEMA RAVEN BRAIN with 4.5K DRAGON Sensor (EF Mount) sensor dimensions are 23.04 x 10.8 mm making it Super35 in width. The short height make the image very wide with a 2.40 aspect ratio.

Q: 5. Does this kit come with a RED Base Expander Module?

A: I'm afraid not. However that is available for an additional purchase, it is B&H # REDSMC2BE.https://bhpho.to/2DEJylr

Q: 6. Is this glass or plastic?

A: Needed to pull the filter out of the case. I believe it is plastic making it a slightly weigh slightly less than glass.

Q: 7. Does this include 3 filter bags and 1 bigger carrying pouch like in the photos?

A: Yes; as indicated under the Overview for the Porta Brace Filter Pouch Set, the kit contains three (3) filter pouches that each feature a padded, non-abrasive, nylon interior and a zippered closure and one (1) nylon carry pouch with a zippered closure which will accommodate all three filter pouches.

Q: 8. What is the dynamic range of the RED Raven? If it uses the Dragon sensor, does that mean it has the same dynamic range as the Epic Dragon?

A: RED Raven has 16.5 stops of DR.

Q: 9. What is the Raven's sensor size? Is it smaller than Super 35mm?

A: The crop size is a little bit smaller than Super 35mm. The actual crop is 1.87x.

Q: 10. will this fits on gopro hero? (the simple one with enclosed battery), thanks

A: It fits my hero 3+ dive housing. Not sure about older versions.