This is a cross filter that beautifully makes light sources shine in a cross shape, perfect for nightscapes, illuminations, and astrophotography. The "4X short type" allows for natural and balanced light rays. It has only been used twice and is in almost new condition. It's high-quality, as you'd expect from KANI, and uses reliable German SCHOTT B270 glass. Specifications: Brand: KANI Material: Glass Effect Type: Cross Screen (4X) Size: 100 x 100 x 2mm System: Compatible with 100mm square filters Condition: Usage: Only 2 times Almost new No noticeable scratches or dirt on the glass surface Accessories: All items shown in the photos. This cross filter can add a glamorous touch to your nightscape, illumination, and astrophotography. Please consider this opportunity.