Lumicon · 2" → 1.25" Step-Down Reducer
Use 1.25" eyepieces and accessories in a 2" focuser or diagonal.
The Lumicon 2" to 1.25" Reducer drops into any 2" focuser or diagonal and accepts 1.25" eyepieces and accessories. It’s the standard way to run your 1.25" eyepiece collection in a 2" focuser, and it carries 2"/48mm filter threads on the barrel so you can thread a 2" filter below the eyepiece. A brass thumbscrew locks the eyepiece in place.
Specifications
Telescope side
2" male barrel — drops into any 2" focuser or diagonal
Eyepiece side
1.25" female holder — accepts 1.25" eyepieces & accessories
Filter threads
2" / 48mm — on the barrel
Locking
Brass thumbscrew
How it connects
2" focuser / diagonal → 2"→ 1.25" reducer → 1.25" eyepiece or accessory
Filter tip: the 2"/48mm threads let you mount a 2" filter on the reducer barrel, below a 1.25" eyepiece — handy when you only own 2" filters but want to observe with a 1.25" eyepiece.
Frequently Asked Questions
What does a 2" to 1.25" reducer do?
It adapts a 2" focuser or diagonal down to 1.25", so you can use 1.25" eyepieces and accessories in a 2" telescope. The 2" barrel drops in like a 2" eyepiece and the 1.25" eyepiece seats on top.
Does it have filter threads?
Yes — it has 2"/48mm filter threads on the barrel, so you can thread a 2" filter onto the reducer below your 1.25" eyepiece.
How is this different from an extension tube?
A reducer changes the barrel size (2" down to 1.25"). An extension tube keeps the same barrel size but adds length to move the eyepiece farther out. This part is about fitting a smaller eyepiece into a larger focuser.
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