I replied to this post earlier and the **** PC didn't post it.
Doctor where perhaps comparable with Leupold maybe 10 years ago. WIth slightly better coatings maybe. In the last years they have come on in Quality and are now a reliable hunting scope with good clarity. They are no S&B, but they are a good option for a guy on a budget.
Doctor also manufacture scopes for the 2 big German hunting store chains, Kettner and Frankonia ( like Cabellas.)
in the same way the motor industry has maybe 1 model of vehicle with 3 different names and prices (eg VW Sharan, Seat Alhambra, Ford Galaxy) with the Frankonia or Kettner scopes you get the same Doctor scope, at a sli8ghtly discount price.
The difference is typicaly around 10 to 20 %
for example.
The Frankonia catalog lists the Doctor 2.5-10x48, 30mm, alloy, illuminated at : 1120 euro
same scope, with frankonia name on it: 989 euro.
Pete