This is an ultra low-profile 1.25" to 2" eyepiece adaptor with built-in 2" filter thread to take 2" filters.

The adapter allows 1.25" eyepieces to be inserted in a 2" eyepiece holder at the lowest possible position, and features an integral 2" filter thread and an internal brass collar to stop the sub-flush locking screw marking your chrome eyepiece barrels.

The adaptor fits all 2" eyepiece holders, and allows the use of 1.25" eyepieces as well as 2" filters. This is a very useful feature if you own 2" filters, as it allows the eyepiece to be changed without removing the filter.

Our comment: this unusual adapter provides the lowest possible ('lowest' in the sense of profile above the 2" eyepiece holder) conversion of 1.25" nose-piece barrels to 2" size. Given that the lock screw ends up inside the 2" eyepiece holder tube, this adapter is best suited to situations where a semi-permanent modification is required.

Made of aluminium and hard-anodised in a semi-gloss (or satin) black finish. A nice touch that sets this adaptor apart is the brass collar that prevents the lock screw marking the chrome barrel of your eyepieces.

It is important to note that the locking grub screw on this adapter actually ends up inside the 2" eyepiece barrel when this adapter is used - and in general this adapter is designed to semi-permanently adapt 1.25" fittings to 2" size.