TS 1.25" 25mm extension sleeve with filter thread

The extension sleeve is simply screwed into the filter thread of 1.25" eyepieces or 1.25" adapters and thereby extends the insertion sleeve by 25 mm.

♦ Connection to eyepiece: 1.25" filter thread (28.5 mm), external thread

♦ Connection on the telescope side: 1.25" eyepiece socket with internal thread (28.5 mm) for 1.25" filter

♦ Inner diameter 28mm

♦ Material: Light metal, black anodized


 
TS-Optics 1.25" extension sleeve with filter thread on both sides - 25 mm length
This adapter has proven to be very important in many areas of astronomy. The extension sleeve is simply screwed into the filter thread of 1.25" eyepieces or 1.25" adapters and thereby extends the insertion sleeve by 25 mm.

You can screw in a filter on the telescope side or even connect another extension sleeve. This means that the socket can be extended almost as desired without reducing the accuracy of the fit, as is the case with plug-in adapters that can wobble.

Areas of application include:


♦ Socket extension for cameras and eyepieces when the focus is just a little outside and there is no space for a conventional 1.25" extension.

♦ An interesting combination is with our optional 0.5x reducer (see second picture) - the extension sleeve increases the reduction effect. You can find the link to the reducer below in the accessory recommendations. Note: Unfortunately, with some cameras you can no longer focus when using this extension because the back focus is shortened by the reducer.


 
Type: Extension sleeve for 1.25" eyepieces
Optical path length: 25 mm
Connection: 1.25" filter thread (28.5 mm), inside and outside
Thread pitch: 0.6 mm
Inner diameter: 28mm
Material: metal, black anodized

♦ Metal sleeve with filter thread on both sides