Popular Articles
Types of Telescope Eyepieces: From Kellner and Plössl to Modern Designs
When you look through a telescope, you’re not just using the telescope—you’re using a partnership. The eyepiece is half of that equation. Think of it as the final storyteller in...
Types of Telescope Eyepieces: From Kellner and Plössl to Modern Designs
When you look through a telescope, you’re not just using the telescope—you’re using a partnership. The eyepiece is half of that equation. Think of it as the final storyteller in...
Understanding Focal Reducers
A focal reducer, sometimes called a Shapley lens, does exactly what its name promises: it shortens a telescope’s effective focal length. In that sense, it is the optical opposite of...
Understanding Focal Reducers
A focal reducer, sometimes called a Shapley lens, does exactly what its name promises: it shortens a telescope’s effective focal length. In that sense, it is the optical opposite of...
Back Focus for Astrophotography: How to Get Perfect Spacing
Most full-frame and APS-C DSLR and mirrorless cameras have an industry-standard 55 mm of internal back focus when paired with a lens or a T-ring. The thickness of the T-ring...
Back Focus for Astrophotography: How to Get Perfect Spacing
Most full-frame and APS-C DSLR and mirrorless cameras have an industry-standard 55 mm of internal back focus when paired with a lens or a T-ring. The thickness of the T-ring...
Understanding Your Telescope’s Back Focus
Back focus is the distance from the end of your focuser’s drawtube to the point where your telescope forms an image—the focal plane. When your telescope is used in its...
Understanding Your Telescope’s Back Focus
Back focus is the distance from the end of your focuser’s drawtube to the point where your telescope forms an image—the focal plane. When your telescope is used in its...