If you’re thinking you only have to change your furnace filter once a year, you may be shortening the life of your furnace. Many costly furnace repairs can be avoided with regular filter changing. If ...

Astrocrumb’s FilterSlide Mark II is for Feather Touch focusers on Dobsonian-mounted Newtonian reflectors. The company includes an adapter ring, and the unit installs in 30 seconds. The filter slide ...