Controlling Contrast is difficult in bright sunlit exteriors. Exposing for either highlights or shadows will leave the other severely under-or over-exposed.
Tiffen Filters 4.5" Round Ultra Contrast uses the surrounding ambient light, not just light in the image area, to evenly lighten shadows throughout. Use it where contrast control is needed without any other effect on sharpness or highlight flare being apparent. - Works with surrounding ambient light - Captures details lost in shadows - Lowers contrast evenly throughout image - No flare or halation - Lets you "see" more