Recently I bought the 2″ ZWO IR cut filter from Sidereal Trading to use in my imaging system (A Skywatcher Evostar 72mm telescope with focal reducer and a ZWO ASI294MC Pro one shot colour camera) I highly recommend a filter such as this for anyone imaging with a similar setup as it makes a huge difference to image quality. It greatly reduced issues with reflections in the imaging train, significantly reduced the star size and allowed much easier colour management. A cheap investment for such a large improvement in image quality.
