Ron (Netherlands)
Member
In a batch of mounting rings I bought recently mainly for my pillbox lenses and one for my Petzvals, appeared to have upon closer inspection a TT&H inscription. Apparently it is meant for a big lens since its internal diameter is about 3.392 inch (86,19mm). It has a coarse thread of 12 TPI.
My (short) search couldn't trace a lens that big by TT&H....
Any of you have one or a catalogue or other source?
thanks
My (short) search couldn't trace a lens that big by TT&H....
Any of you have one or a catalogue or other source?
thanks