An artificial star will provide you an excellent alternative mean to do the star test anytime and anywhere you want, without all the drawbacks of the real stars. However, the problem with artificial star is that you really need different size of artificial stars for different telescopes of different apertures with different F/#, and even for the same telescopes but at different distances, and under different lighting environment.
Our 4-pinhole module (P5123A) is a perfect solution to this problem. It is a piece of extremely thin stainless steel sheet square of 50mm * 50mm, with 4 precision pinholes (50/100/200/300 microns). It will enable you to test practically all the telescopes of different apertures with different F/#, from any reasonable distances needed! It will enable you to build a revolutionary Artificial Multi Star, so you can instantly find out which star is best for your particular telescope at that particular distance under that particular lighting environment.
For a detailed step by step instruction on how to use our pinhole module to build a revolutionary Artificial Multi Star:
To purchase the 4-Pinhole module: