This 49mm B+W 630/091 Dark Red MRC Filter 49mmfrom B+W 630/091 Dark Red MRC Filter 49mmcan be used to increase image contrast using black-and-white film. When using this filter, blue skies are reproduced in dramatically darker shades of gray than if a filter was not used. Simultaneously, red to light yellow subjects are rendered in lighter shades of gray. Landscape and architectural photos show an increased, almost graphic contrast, while a cloudy sky may already appear dramatic.

B+W MRC Basic filters are made with the exclusive Multi-Resistant Coating (MRC) nano premium coating technology. This high-quality broadband coating is applied on both sides and enhances the optical imaging properties, allowing uniform and increased transmittance across the entire light spectrum to be achieved, with minimal physically induced remaining reflection. The nano all-around protection on the filter glass also ensures increased scratch resistance and extremely fast, easy cleaning, providing a long filter life. The slim filter ring design is compatible with wide-angle lenses with an equivalent width of a 17mm full-frame lens. The top knurling is redesigned for enhanced gripping.

Increases Black-and-White Film Contrast    Dramatically Darkens Blue Skies    Dramatically Lightens Red to Warm Tones    Lightens Whites, Reduces Daylight Haze    MRC Coating, Resistance Coating    Schott Glass Construction    Brass Filter Ring    Cotton Lens Storage Pouch

Related Questions and Answers

Q: 1. How many stops adjustment?

A: The manufacturer does not present this information for the B+W #630/091 Dark Red MRC Basic Filter (67mm) but as a general rule a red filter typically needs about 3 stops of adjustment.

Q: 2. slave flash can ?

A: Yes this Sigma EF-630 Electronic Flash for Canon Cameras has Wireless Slave Functionality.

Q: 3. when another flash fires does to the flash does it fires too?

A: Yes this flash has wireless slave functionality that allows it to be triggered by another flash.

Q: 4. What is the Filter factor?

A: The B+W High-Transmission MRC-Nano Master Circular Polarizer has a filter factor of 1-1.5 stops.

Q: 5. What does the '630" designation mean for B+W filters?

A: B+W does not describe what 630 means. It is only a model designation.

Q: 6. is 49mm mrc nano a slim design filter?

A: The B+W UV-Haze #010 MRC MASTER Filter (49mm) is a slim filter with no front-filter threads.

Q: 7. I need to know the configuration wires for the hot sho?

A: This is made for Sigma cameras. You can see the configuration of the contacts in this photo. https://static.bhphoto.com/images/multiple_images/images1500x1500/1466172975_IMG_643870.jpg

Q: 8. Does this come with a plastic case or only the pouch that's pictured?

A: Unit comes in a filter storage pouch and is packaged in a black cardboard case.

Q: 9. What is the difference between this and a Kaesemann polarizer? B&H doesn't sell Kaesemann in 62mm, but this costs the same.

A: The Kaesemann series filters are currently being phased out. We have no 62mm size left and soon other sizes will be gone too. The Master series has the same optical quality at the prior Kaesemann series but they added a better grip due to optimized filter ring knurling and it is grease-free for easy rotation.

Q: 10. Will this allow for a lens cap?

A: Yes, this B+W High-Transmission MRC-Nano Master Circular Polarizer Filter (82mm) has front threads to allow for the use of a lens cap.