Sigma HG-21 Large Hand Grip CRK flare and ghost images are

flare and ghost images are minimized by applying exclusive lens coatings to optical elements and employing anti-reflection materials for the interior of the lens barrel

two aspherical elements

5° of tilt

Small cameras or accessories that are compatible with a 1/4 incehs-20 mount can then be connected to the ball head

the K-1 Mark II also has Dynamic Pixel Shift Resolution

Sigma HG-21 Large Hand Grip CRK flare and ghost images areDedicated to the Sigma fp mirrorless camera, the HG 21 Large Hand Grip provides an improved and more secure grip when shooting handheld with the camera. It attaches to the bottom of the camera body via the rear 1 4 inch 20 mount.