- Increases Black and White Contrast
- Effect Corresponds to Wratten 25 Filter
- Significantly Darkens Blue Tones
- Lightens Red and Orange Tones
- Reduces Haze in Daylight
- 8x Filter Factor, +3 Stop
- Schott Glass
- 105mm Front Filter Threads
- Aluminum Ring
Greatly increasing contrast when working in black and white, this 105mm Red 25 Filter from Formatt-Hitech is used to significantly darken cool and blue tones in order to heavily emphasize clouds and produce more dramatic skies. In addition to being ideal for landscape use, this filter is also well-suited to infrared photography and can be used to make color separations with blue and green filters. There is an approximate 8x filter factor with this filter, requiring an increase of 3 stops for normal exposure.
This filter is constructed from Schott glass to maintain high image clarity and color fidelity, and it features a lightweight yet durable aluminum filter ring with 105mm front threads.
- Red filter provides the same effect as a Wratten 25 contrast filter, and helps to noticeably 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.
- Also used for infrared photography and can be paired with 47 blue and 61 green filters for color separation work.
- Filter factor of 8 requires approximately 3 stops of additional exposure to maintain normal results.
- Constructed from Schott glass for optical clarity.
- Aluminum filter ring is both lightweight and durable.
| Type | Black and white contrast |
| Size | 105 mm |
| Grade | Equivalent to Wratten 25 |
| Filter Factor | 8 (+3 stop) |
| Effect | Increases contrast when shooting with black and white film |
| Construction | Schott glass |
| Front Filter Thread Size | 105 mm |
| Packaging Info |
| Package Weight | 0.3 lb |
| Box Dimensions (LxWxH) | 2.0 x 2.0 x 2.0" |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
