Yes, the above scope *is* a Tele Vue: this 700mm, f/5, “TeleVue-140″ scope debuted in 1996 and incorporated our patented 4-element Nagler-Petzval layout in a 5.5”-class Rich Field refractor. To this day the Tele Vue-140 is the largest diameter, fastest focal ratio, Nagler-Petzval refractor we’ve ever made.
“40 Hours of Terror” is how a Washington Post correspondent described Hurricane Dorian’s impact on the Bahamas this past September. The category 5 storm lashed at the islands with 185-mph (295-km/h) winds (tying a record) and relentlessly drove water and debris over land to cause loss of life and $7-billion in property damage. So thorough was the devastation, that recovery efforts are expected to take many years.
A customer recently called because his vintage Tele Vue Renaissance telescope needed some tender-loving care. The Renaissance was our second model, put on the market after the 1981 “Multi-Purpose Telescope” (MPT). The customer’s scope was built in 1985 and is from the initial production design with a bolt-on focuser. After discussing the obvious issues that needed addressing and our evaluation process, he decided it would be worth it to him for us to have a look at the scope.
When we received the scope, the most obvious troubling issue was the focuser. It was unusable. The pinion shaft was badly bent and two of the three teflon runners supporting the draw-tube along its travel were missing. The outer surface of the objective showed years of grime, and all of the brass components were heavily oxidized. The optics, however, were only slightly mis-aligned, producing a mildly flaired star shape at high power, but the image was still serviceable for terrestrial and deep sky viewing. Sadly, after a complete optical and mechanical inspection, we concluded that it just wasn’t worth the effort and expense to revive the telescope. That, however, was not our customer’s conclusion.
He gave us the go-ahead and we proceeded to give his 1985, brass Tele Vue Renaissance a new lease on life. A “renaissance” for this Renaissance if you will!
Vic Bradford has owned a brass Renaissance telescope since 2006, about 20 years after he first saw Al Nagler show one at a Riverside Star Party. He regrets not owning one sooner as “the scope uniquely merges the beauty of form and function”. We’ve reprinted some excerpts below from a treatise he sent us on caring for the brass on his Renaissance telescope and brass fittings on his matching Tele Vue Gibraltar mount. He offers a caveat to the reader: “you may find these suggestions overkill and much can be said for simply leaving brass alone so it can develop a nice patina. Like any other fine equipment, though, it benefits from good care and research.”
These instructions are for cleaning and polishing brass lacking a clear-coating. Following these instructions will ruin your coating.