Model BF 4X5BGND9HDV4 / BF4X5BGND9HDV4. 4x5.650 / 4x5 size. This is the 4mm thick highest quality version of this filter. Compare this glass in quality to Tiffen, Schneider, and B+W. Retails originally for $306.

ND.9 (exposure adjustment = 3 stops, reduces ISO 1/8)

This is vertical orientation (same as the BF 4X5BGND6HD4 except vertical instead of horizontal). Blenders resemble traditional graduated filters except that they are colored on top with a gradual transition to more subtle at the bottom. Graduated filters transition somewhere in the middle of the filter.

Formatt Blender Filters are for those who enjoy outdoor, scenic or architectural photography, Blenders are the perfect choice. Whether trying to affect color change or enhance a mood, Blenders give you the edge you need.

Often it is necessary or desirable to balance the light intensity in one part of a scene with another. This is especially true in situations where you don't have total light control, as in bright contrasty landscapes. Exposing for the foreground will produce a washed-out, over-exposed sky while exposing for the sky will leave the foreground dark and under-exposed. This filter enables cloud detail to be kept correctly exposed in the picture.

• HD (High Definition) Neutral Density Filters were created to satisfy the needs of the film industry that wanted a filter to minimize depth of field, yet, with the capability of shooting at wide apertures. It is an optically correct and clean neutral density filter specifically targeted for HD photography.
• Interesting effects can be achieved using two different Blenders, (one upside down) one of which affects the top half of the image with the other affecting the bottom half
• Adding color excitement to a drab sky
• Changing the specific color in a scene to create a desired special effect
• Enhancing the existing color or creating subtle color drama
• Creating more balanced exposure in uneven lighting conditions