Lumicon · Female T-Thread → 2" Holder
Puts a 2" 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 2" Adapter threads onto a male T-thread (T2 / M42×0.75mm) and presents a 2" 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 2" eyepiece or visual accessory into it.
Specifications
Input (threads on)
Female T-thread (T2 / M42×0.75mm)
Output (accepts)
2" eyepieces and accessories
Overall length
2"
How it connects
Male T-thread device → female-T to 2" adapter → 2" eyepiece or accessory
Common applications: use 2" eyepieces on the Lumicon 1.25" Multiple Filter Selector and Solar Prominence Filter, or on the Lumicon 2" Multiple Filter Selector when the photographic adapter (LF5020) is installed.
Frequently Asked Questions
What is a female T-thread adapter for?
It converts a male T-thread (T2 / M42×0.75mm) into a 2" eyepiece holder. That lets you use 2" 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 2" end?
Any standard 2" astronomy eyepiece or accessory — the same 2" 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.
Which Lumicon accessories is this used with?
It is commonly used to run 2" eyepieces on the Lumicon 1.25" Multiple Filter Selector and Solar Prominence Filter, and on the 2" Multiple Filter Selector when the LF5020 photographic adapter is fitted.
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