These are available options for the DC0. Please be aware that these are made to order, and may delay shipment by a week or two.
The default optic for the DC0 is 30 degrees, and this works well for most applications. However if you'd prefer a little more throw, the 10 and 20 degree optics work well, with 10 degree giving you the most throw.
On the main picture, from left to right the optics are 10, 20 and 30 degrees. On the secondary picture, from top to bottom beams are 10, 20, and 30 degrees.