- Tech 0.8 Reducer
- Canon EOS Ra
- imaging train
- ZWO EFW
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.
It's a ring of metal with threads. Not much to go wrong.
OPT does s good job. The only issue these days is having things in stock. These adapters were in Stock. Timely delivery.
Fast shipping -- thin, but well made and doesn't add to length of imaging train for back focus.
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.
Purchased this to replace adapter on my ZWO EFW. Worked perfectly.