***** **********Best Quality Guranteed. *****SV133 High-quality telescope filter wheel is ideally suitable for visual observations with 2" eyepieces; And with the included adapter it is also perfectly suitable for astrophotography with single lens reflex cameras and CCD cameras (M48 to M42 adapter exclude) allows you to quickly and easily change filter*****The robustly constructed filter wheel is supplied with a 2" eyepiece adaptor; 2" focuser nosepiece; 2" Conversion Interface; M48 Camera Adapter and Rotation Lock Ring; allowing you to quickly and easily attach it to your focuser; make whereby high-precision distance regulation becomes possible*****This 2" filter wheel features a helpful number system that allows you to quickly place the filter of your choice into the light path; Filter positions indicated by the numbers 1-5; simply note the reference number of each filter during installation; then rotate the knurled wheel until the desired number is displayed in the small notch in the