Binorum SuperStrong 2″/1.25″ 10mm Focuser Adapter

Binorum SuperStrong 2″/1.25″ 10mm Focuser Adapter

If your telescope has a 2″ focuser and you want to use 1.25″ eyepieces with it, this adapter is exactly what you need. The Binorum SuperStrong 2″/1.25″ adapter has an optical length of 10mm and connects both standards without any compromise on precision or stability. It fits firmly, stays put, and introduces no unwanted play into the setup - something you will notice and appreciate immediately when observing at high magnification. This is one accessory that belongs in every serious observer's kit.

Why the optical length matters

The 10mm optical length is an important parameter. It affects the effective focal length of your setup and the focus position you can achieve. When choosing an adapter, you need to take this figure into account - especially if you use eyepieces from different manufacturers, or if you combine the adapter with other accessories such as filters or correctors.

The precisely machined 1.25″ inner diameter keeps your eyepiece perfectly centred. This prevents vignetting and eliminates light leaks at the joint. The result is a clean, sharp image with no distracting artefacts caused by a poorly fitted eyepiece.

Mechanical quality - why it makes a difference

With adapters of this type, mechanical quality is critical. A poorly made adapter can cause the eyepiece to tilt slightly or work loose during a session - even with the slightest touch of the telescope. The SuperStrong adapter is built to prevent exactly that.

• Solid materials with tight manufacturing tolerances
• No wobble, no tilt, no slippage during use
• Eyepiece stays exactly where you place it
• Reliable performance at high magnification

This matters most when you are observing the Moon or planets, where even the smallest shift in the optics noticeably reduces image quality. Investing in quality accessories always pays off the moment you look through the eyepiece.

About Binorum

Binorum is a Czech brand of astronomical accessories, founded by active amateur astronomers - people who know exactly what they expect from their equipment. The brand focuses on functionality, precise workmanship, and long-term reliability rather than flashy presentation. Binorum offers a wide range of accessories, from adapters and reducers to filters and specialist equipment. Every product is tested under real observing conditions. If you want accessories you can rely on night after night, Binorum is a choice that makes sense.

Technical specifications