Has anyone ever try converting one and using it for astrophotography?
seem interesting because they're some long lens, yet really fast and cheap too.
Since they use the triplet design would that reduce the CA than normal lens?
I know it won't be apparent and still fine for terrestrial use, but I'm not sure about astro.
For those wondering, they look like this, and it's possible to use them with DSLRs with 52-42 helicoid focus adapter tube