Explore Scientific 1.25" 2x Focal Extender

A focal extender doubles the magnification of any eyepiece you already own without buying new glass, and this 2x model from Explore Scientific does exactly that in the standard 1.25" barrel size. It's a simple way to turn three eyepieces into six usable magnifications, and because you're extending a lower-power eyepiece rather than buying a high-power one outright, you keep that eyepiece's more generous eye relief — a real benefit for eyeglass wearers. Explore Scientific also makes 3x and 5x versions if you need a bigger jump.

• 2x magnification boost: doubles the power of any 1.25" eyepiece you already own.
• Retains eye relief: since you're extending a lower-power eyepiece instead of switching to a higher-power one, you keep its more comfortable eye relief — useful for eyeglass wearers.
• Compact add-on: 96mm long, 45mm wide, and just 260 grams (9.1 oz), so it doesn't unbalance the focuser.