Have you ever struggled to get a sharp image through your telescope? The secret might be in your backfocus. Simply put, backfocus is the distance between the telescope’s rear lens or mirror and the point where the image is perfectly focused.
Why does this matter? Because if your camera sensor or eyepiece isn’t positioned at this exact spot, your images will look blurry or distorted. Different telescopes and accessories have their own backfocus requirements, so understanding this concept is essential for clear views.
Next time you set up your telescope, remember: aligning your equipment to the correct backfocus is the first step toward stunning, sharp images of the night sky.
