Product Reviews
- Reviews
- Questions
- threads
- Tech 0.8 Reducer
- Canon EOS Ra
- triplet
- T-Adapter
- imaging train
- ZWO EFW
- ring
- issue
- stock

Such a useful adapter
I don't know why other manufacturers don't make these. You can turn a 48mm female into a 42mm female. Or a 42mm Male into a 48mm male. Serves both purposes.

A simple, basic item.
It's a ring of metal with threads. Not much to go wrong.

Good
OPT does s good job. The only issue these days is having things in stock. These adapters were in Stock. Timely delivery.

Exellent Adapter
Fast shipping -- thin, but well made and doesn't add to length of imaging train for back focus.

Works Well
I use this to step down my wide T-Adapter for my Canon EOS Ra from 48mm to the "standard" 42mm to fit my Astro-Tech 0.8 Reducer (really need to find a reducer for my 80mm / 480mm triplet that has 48mm threads!) It works well and have not had any issues.

ZWO M48 to M42 Adapter
Purchased this to replace adapter on my ZWO EFW. Worked perfectly.