Tele Vue Scope Renaissance! (Part I)

Tele Vue Renaissance brass telescope (built 1984-1993) was the first Nagler-Petzval type lens design to go into wide-spread production.  With its solid brass tube, its classic look is timeless.
Restoring a Storied Scope
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!
 
Left: The brass telescope tube in need of polishing. Right: tube after machine and hand polishing.

Continue reading “Tele Vue Scope Renaissance! (Part I)”

Tele Vue Scope Renaissance! (Part II)

This post is about maintaining a brass Renaissance and matching Gibraltar mount. For the post on restoring a brass Renaissance, please see our companion blog post:

 

Vic Bradford’s brass Renaissance 102 on matching Gibraltar mount stands in front of an antique pie safe. Images courtesy of Vic Bradford.

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.

Continue reading “Tele Vue Scope Renaissance! (Part II)”

Tele Vue’s 2018!

Rho Ophiuchi & Friends by AstroBin user David Augros. Copyright David Augros. Used by permission. NP101is APO refractor plus Large Field Corrector (LCL-1069) with Lumicon Deep Sky 2″ filter into modified Canon EOS 6D DSLR.
It’s hard to believe that our blog has been posting articles for two solid years already. We didn’t note it at the time, but our post “odometer” rolled past 100 this October. Our 101st post was Tele Vue-NP101is Imaging the Skies of Rhode Island! It featured David Augros’ images from a dark-site on Rhode Island with a  Tele Vue-NP101is  using our Large Field Corrector and modified Canon EOS 6D DSLR. He chose that scope because it offered “a nice balance between a generous wide field and fine details in my final images.”

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Tele Vue-76: Imaging the Southern Hemisphere

Our very portable Tele Vue-76 APO refractor has been popular with eclipse-chasers as well as with users that cross over into spotting and birding. With the popularity of small and powerful dedicated imaging cameras, the performance of the Tele Vue-76 is getting noticed by deep-sky imagers on the go. Case in point, Diego Cartes Saavedra is producing outstanding deep-space images from various locations  in the southern-hemisphere with this scope. All his images in this blog post were taken from July through November 2018.
 
Diego’s study of the Tarantula Nebula and surrounding region in the Large Magellanic Cloud examines the area imaged through different filters. The first image is a monochrome version taken in Hydrogen-α light.
 
NGC 2070 – Narrowband H-Alpha by AstroBin user Diego Cartes. Copyright Diego Cartes. All Rights Reserved. Used by permission. Tele Vue-76 APO refractor with Tele Vue TRF-2008 0.8x Reducer/Flattener (converts Tele Vue-76 to 380mm f/5) and ZWO ASI 1600MM Cooled Pro monochrome camera though ZWO 36mm H-alpha filter for 62×300″ for a total of 5.2-hours.

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Live on Wednesday : David Nagler on “Telescope Talk Hangout” Video stream

Join Tele Vue President David Nagler live on the Deep Astronomy channel’s “Telescope Talk Hangout” video stream with host Tony Darnell.

This hour-long show will stream live on YouTube.com on Wednesday,  December 5th at Noon Pacific Time.

URL for the show: https://www.youtube.com/watch?v=J3RBypMmHMQ

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Imaging the Skies Over Bavaria

Surfing through the AstroBin site’s collection of user generated astrophotos we were struck at this vivid example of M16 “The Eagle Nebula.” The image has a depth  and contrast we’ve never seen before. Created using “Hubble Pallet” filters, the rich blue (Oxygen III) surrounding the “Pillars of Creation” structure is highlighted by the ruddy bland of reds (Sulfur) and greens (Hydrogen-alpha and Nitrogen) in the “folds” of the surrounding dust clouds. The blackness of space at the edge of the dust and gas cloud is preserved against all the colors. 

M16 Eagle Nebula – Hubble Palette by AstroBin user Paul Schuberth. Copyright Paul Schuberth, All Rights Reserved. Used by permission. Teleskop Service TS Optics 10″ f/4.65 Newtonian-Astrograph using Tele Vue BIG Paracorr 3″ and Atik 383L+ mono camera carried on Sky-Watcher EQ8 mount. Taken in the “Hubble Palette” using Baader H-alpha 7nm (10×600″), OIII 8.5nm (10×600″), and SII 8nm (10×600″) filters with a total integration time of 5-hrs.

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DeLite-full Holiday Season SALE!

November 23rd through December 7th, 2018
SAVE 10% on EVERY DeLite Eyepiece !
 

Tele Vue is wishing you a “DeLite-full” Holiday Season with a SALE on the acclaimed DeLite series of eyepieces. “The DeLite eyepieces deliver a fantastic image, free from aberration and very crisp — exactly what a good eyepiece should do” – Sky at Night. Exceptional performance is expected from Tele Vue and DeLite eyepieces deliver! 62° of high-contrast, tack-sharp images will DeLite your amateur astronomer with every view. Mix in 20-mm eye relief with a quick adjusting and locking eyeguard, compact size for our Bino Vue, compatibility with DIOPTRX™ and FoneMate™ , and light weight; it’s no wonder Astronomy wrote, “Tele Vue has once again created a line of all-around excellent eyepieces…The DeLite line should be on your must-view-through list.” In the crowded class of 60° eyepieces, the DeLite is in a class of its own. Take advantage of Holiday Sale Savings valid while supplies last. Please visit your Tele Vue Dealer today!

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2018 RCE Redux

Here’s a little photo blog from the “Rencontres du Ciel et de l’Espace” (RCE) show.  The show took place from November 1st through 3rd at the Museum of Science and Industry in Paris and featured over 150 lectures (in French of course) over the three days with vendors spread over two floors.  Daily attendance is in the neighborhood of 2,500 people, so it’s a busy show!  I’m only sorry that these pictures don’t do the show justice. After all, I’m really there to speak with people, make recommendations, and demonstrate our equipment, not write a blog. 🙂
 
I arrived at my hotel quite exhausted at 7 am Parisian time. Thankfully my room was ready and I took a long nap while the Optique Unterlinden crew did the heavy lifting setting up most of the booth.  Show set up was 2-to-10 pm. I arrived at 5 to finish arranging the eyepiece display cabinet and set up our eyepiece/Tele Vue-85/Kermitis as well as Tele Vue-60/FoneMate demonstrations. Also, Alvaro of AstronSCIENTIFIC had photo and visual configurations of Rotarions set up on an NP101is and Tele Vue-85.

Tele Vue-85: Portable, Powerful, Photo-Visual APO

Imaging a rare celestial event requires advanced planning, the right equipment, and often a lot of post-processing.  Tony Cook traveled from the UK to Paphos on the southwest of  coast of Cyprus (we suppose for the over 300 sunny days a year) to image the 2004 Transit of Venus with his Tele Vue-85, Coronado SM60 hydrogen alpha filter, Canon 10D camera, and Losmandy GM-8 mount.  The 85’s optical capabilities and airline portability often makes it a favorite for amateur astronomers chasing down rare events like this.
 
Transit of Venus – 8th June 2004 by AstroBin user Tony Cook. License: Attribution-NonCommercial-NoDerivs Creative Commons. Used by permission. Tele Vue-85 APO refractor with Coronado SM60 hydrogen alpha filter and Canon 10D camera. This is actually a synthetic color image created from the luminosity of the green channel of the photos.  Click image link to read how post-processing was carried out to create this detailed composite image.

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Tele Vue: We’ll Always Have Paris!

Here I am with Pierre-Jean who I first met in 2006.  In this photo from the 2016 RCE, Pierre-Jean had just purchased his 82nd and 83rd Tele Vue eyepieces, a pair of 15mm Plössls.

It’s almost time to board the plane for my biennial trip to the “Rencontres du Ciel et de l’Espace” (RCE).  The show takes place from November 1st through 3rd at the Museum of Science and Industry in Paris and features over 150 lectures (in French of course) over the three days with vendors spread over two floors.  Daily attendance is in the neighborhood of 2,500 people, so it’s a busy show!  Continue reading “Tele Vue: We’ll Always Have Paris!