"It is probably best to just aggregate all the companies that sold have sold telescopes from the late 70s to present."
One would have to start somewhere, but why start with the late 1970s and continue to the present? "Present" scopes are not yet classics, although the best of them will be, someday. Many of the scopes of the 1970s have roots in earlier models going back to the repurposing of the Japanese military optical industry for peacetime use after World War II. Classics from the1960s, 1950s, and earlier show in this forum often.
70s are just a good starting point. We only want to catalog desirable scopes, and to your point, there is a good amount of information on this forum regarding classic scopes prior to '70 and many of these scopes are very high-quality and highly sought-after. We do plan to incorporate these.
However, there are a lot of junk scopes out there and a lot of companies which produced scopes which are generally regarded as junk for one reason or another. 1970 (50 years ago) seemed like a good cut off point to get the largest amount of user input on as many brands and telescopes as possible, the logic being that a lot of these scopes are still remembered and were owned and used by CN users who are still alive and still care enough to post about it. I feel that is reasonable in order to help us separate the wheat from the chaff.
It is not a hard and fast rule and is somewhat arbitrary. So if there is a really great line of classic scopes from earlier, I will not omit it simply because it was not made after 1970.
Edited by ittryn, 19 October 2024 - 08:57 AM.