Lumicon · Female T-Thread → 1.25" Holder
Puts a 1.25" eyepiece or accessory onto anything that ends in a male T-thread — the reverse of a prime focus adapter.
The Lumicon Female T-Thread to 1.25" Adapter threads onto a male T-thread (T2 / M42×0.75mm) and presents a 1.25" eyepiece holder on the other side. Use it whenever a device in your optical train terminates in a male T-thread — a filter selector, focuser drawtube, or imaging accessory — and you want to drop a 1.25" eyepiece or visual accessory into it.
Specifications
Input (threads on)
Female T-thread (T2 / M42×0.75mm)
Output (accepts)
1.25" eyepieces and accessories
How it connects
Male T-thread device → female-T to 1.25" adapter → 1.25" eyepiece or accessory
Frequently Asked Questions
What is a female T-thread adapter for?
It converts a male T-thread (T2 / M42×0.75mm) into a 1.25" eyepiece holder. That lets you use 1.25" eyepieces and accessories on any device that ends in a male T-thread, such as a filter selector or an imaging accessory.
What fits in the 1.25" end?
Any standard 1.25" astronomy eyepiece or accessory — the same 1.25" barrel format used across visual gear.
How is this different from a prime focus adapter?
A prime focus adapter presents a male T-thread so a camera can attach to your telescope. This adapter works in the opposite direction — it accepts a male T-thread and gives you an eyepiece holder, so you can use eyepieces and visual accessories on T-threaded equipment.
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