TELE VUE SCIENTIFIC PART 2
Doing Science with Tele Vue Optics

Tele Vue Optics has been the key to unlocking the limits of magnification.

In the last installment, our scientific path went from “polar to solar.” (If you missed it, please go back and read Tele Vue Scientific Part 1.) In Part 2 of this multi-part blog post on the use of Tele Vue gear in science, we reveal Sneakey research with Tele Vue Powermates and how a compact Tele Vue-NP101is telescope proved once again that lights are “all askew in the heavens.” All this research was done using our standard gear with products bought off-the-shelf — the same as you would receive from Tele Vue.

Continue reading “TELE VUE SCIENTIFIC PART 2
Doing Science with Tele Vue Optics”

NP101: Imaging the Skies Over Colorado & New Product!

Horsehead and Flame Nebulae in Hα by SmugMug user Steven Schlagel. All rights reserved. Used by permission. Imaging details: the Tele Vue-NP101 APO (Nagler-Petzval) refractor (101mm, f/5.4) with a Nikon 810Da camera and narrowband Hydrogen-alpha filter were used to create this image. Exposure time was 3-hours total.

The above portrait of the Horsehead and Flame nebulae is stunning.  Created in Hydrogen-alpha light, this monochrome image is filled with wispy tendrils, puffy molecular clouds, dark lanes, and glowing gas. It really brings out the interplay of shockwaves and ionizing radiation at work in this region of the much larger Orion Molecular Cloud Complex. 

You can compare this image with the color one below of the same region. The red hues are dramatic, but we lose a sense of the “sculpting” that is taking place in the gas and dust. 

Horsehead and Flame Nebulae by SmugMug user Steven Schlagel. All rights reserved. Used by permission. Imaging details: the Tele Vue-NP101 APO (Nagler-Petzval) refractor (101mm, f/5.4) with a Nikon D810a DSLR camera for 6-hours.

The Horsehead (Barnard 33) and Flame Nebulae (NGC 2024) are separated by the bright blue supergiant star Alnitak (center-left in the above image), the easternmost star in the “Belt”  of constellation Orion. Like a giant neon sign, the “Flame”, below Alnitak in the image, is “lit up” by ultraviolet light from the star. The flame-like appearance is enhanced by dark “branches” of light-absorbing gas in the nebula. As for the Horsehead, its appearance is due to the three-star system Sigma Orionis “above” the “horse” (bright star along a line through the horse’s neck and head). It causes hydrogen gas to glow behind a dark concentration of dust that has the distinctive appearance of a horse’s head. 

Continue reading “NP101: Imaging the Skies Over Colorado & New Product!”

TELE VUE SCIENTIFIC PART 1
Doing Science with Tele Vue Optics

Tele Vue Optics’ science goes from solar to polar. Mosaic image adopted from ASTEP study by Crouzet et al. and PUNCH website. Images copyright their respective owners.

Tele Vue’s product quality, consistency, and reliability are well known in amateur astronomy circles. So, it shouldn’t come as a surprise that our top-tier optical performance also attracts the interest of professional astronomers looking for “off-the-shelf” solutions for their experimental needs. Tele Vue also provides researchers with the in-depth technical analysis necessary to determine if product integration is feasible or if custom solutions are required.

In this multi-part blog post we’ll explore some of the published science using our standard gear and take a look at a future science mission that called for a custom designed Tele Vue lens. Note that all the studies in the series, except the last one in this part, were produced with products bought off-the-shelf, same as you would receive from Tele Vue.

Continue reading “TELE VUE SCIENTIFIC PART 1
Doing Science with Tele Vue Optics”

Tele Vue-NP101is: Imaging the Skies Over Southwest Florida

Rosette Nebula and NGC 2244 Cluster (Narrowband) by SmugMug user Linwood Ferguson. All rights reserved. Used by permission. Imaging details: the Tele Vue-NP101is APO (Nagler-Petzval) refractor (101mm, f/5.4), riding on an iOptron CEM70G mount, imaged with a ZWO ASI6200MM Pro camera, with ZWO Filter Wheel and Chroma 5nm narrowband filters. All subframes were 300s using these filters: Hα x 47, SII x 37, OIII x 31. (The OIII had a pretty strong gradient from the moon). Stacked and processed using PixInsight in roughly the Hubble Pallet with green shifted into blue and gold (star color shifted off magenta a bit). Finished off in Photoshop Lightroom Classic 10.0 (Windows).

The lead-off image of this post is certainly an eye-grabber! It is one of the most unique interpretations of the Rosette Nebula (NGC-2237 or Caldwell 49)  in Hubble Palette filters we’ve seen. Most striking, the usual Hubble Palette aquamarine color surrounding the central cluster is cobalt blue! The typical outer ring of yellows and burnt ochre now has a deep-orange hue. This color manipulation was done while maintaining the filamentary wisps and dark protostar Bok Globules in the nebula, along with a jet-black sky background.  The resulting dimensional quality of this image draws the viewer from the ruddy edges of the nebula into the blue-colored center and then out the “back” aperture of the structure.

In the middle of the Covid pandemic, stuck at home, I decided to resurrect an interest in astronomy, and in particular astrophotography.

This image is from a great collection of Tele Vue NP101is images posted by Linwood Ferguson on SmugMug. At the top of this SmugMug page is stated the motivation for his astro imaging: “In the middle of the Covid pandemic, stuck at home, I decided to resurrect an interest in astronomy, and in particular astrophotography”. In this blog, we present a gallery of Linwood’s NP101is images.

Continue reading “Tele Vue-NP101is: Imaging the Skies Over Southwest Florida”

Our Virtual NEAF 2021 Videos

Northeast Astronomy Forum (NEAF) 2021 — “the World’s Largest Astronomy & Space Expo” — is in the history books after streaming 10-hours of material on April 10th.  Tele Vue provided seven unique videos for the event and we’d like to thank all who tuned in and showed their support in the chat!

Each of our videos answers a question from one of our blog readers. If you want to review them, they’re all linked below and cued up to the question being answered. 

Continue reading “Our Virtual NEAF 2021 Videos”

Virtual NEAF 2021: Your Questions Answered!

Due to the continuing COVID-19 crises, the Northeast Astronomy Forum (NEAF) — “the World’s Largest Astronomy & Space Expo” — will be a “virtual,” online-only affair for the second year in a row. However, that is not all bad: it allows people from around the world —  who might normally not travel to New York — to experience this special show. It’ll be FREE too!

Last time in this blog we asked for your Tele Vue product questions which would be answered on videos and played at the virtual NEAF on April 10th. The response was tremendous! Though time and slots were limited, we were able to produce seven videos for the show. Each video provides a “front-row” seat to the answer from David and Al Nagler. Below you can view a 1-minute “sneak peek” video of what to expect.  

Continue reading “Virtual NEAF 2021: Your Questions Answered!”

Virtual NEAF 2021: Send Us Your Questions!

Activity in the Tele Vue NEAF booth over the years.

For a second year, unfortunately there is no actual NEAF to attend. So once again stuck in the virtual world, we thought we might be able to create a bit of the sense of what goes on in our booth at a real NEAF. We hope to whet the appetite of those that have never been and let those experienced NEAF-goers do what they’ve done for us since the first NEAF in 1991… keep us talking about how Tele Vue products can satisfy their needs!

As our “home” show, we normally pack-up every Tele Vue product for display at NEAF. It’s a wonderful chance for people to get their hands on our equipment and really see and feel the care and quality we put into our products. While we’ll miss that personal interaction the most, the other valuable aspect of coming to visit us at NEAF is that you can ask us your questions and we can show you the answer.

With your help, we can do just that!  We thought rather than listen to Al or David ramble on about esoteric product details on a video, let’s do what we do best at NEAF. We answer hundreds of your questions from eyepiece recommendations to DIOPTRX™, Night Vision, our Imaging System, even product philosophy and manufacturing questions — you name it! This is your chance to ask us your questions and we’ll respond in the video just as we would at NEAF.

Continue reading “Virtual NEAF 2021: Send Us Your Questions!”

This Weekend: Messier Marathon 2021!

By the 1970s amateur astronomers had noticed that all 110 Messier objects (a list of notable objects in the northern skies visible in small scopes) could be observed at low northern latitudes over the course of a night in mid-to-late March. Hence, the phrase “Messier Marathon” was invented to describe the attempt at locating and verifying observance  of each object on the list over the course of a single night.

The first page of a typical Messier Marathon check sheet under red light. Messier objects in the background taken with Tele Vue-60is by James Burnell. All rights reserved. Used by permission.

Sheltering in Space
Last year, on March 11, we published our “2020 Messier Marathon!” post on this blog. We noted the best dates to observe based on latitude and lunar phase, and discussed the type of gear to use for the event. We pointed out that the Saguaro Astronomy Club, in Arizona, was one of the oldest organized Marathons and they offered awards in various categories for completing the list. It turned out to be our last blog post during “normal” times that year: COVID-19 social-distancing and lock-down orders, which we had only heard about, suddenly swept through our region. The Saguaro Messier Marathon and many star parties were ultimately canceled that year and it continues into this year.

M33 The Photon Sucker (Triangulum Galaxy) by Astro Bin user Tom Peter. Copyright Tom Peter. Used by permission. Tele Vue-NP127is and Tele Vue-85 combined exposures. This is one of the first few objects in the traditional Messier Marathon list. Of course, in your scope, without the benefit of 15-hrs of exposure, this will look like a blurry little black & white smudge!

The Messier Marathon did and will go on again, “run” by solitary observers “sheltering in space.” In fact, due to COVID-19 there may be MORE Marathoners than ever as the hobby of amateur astronomy has taken off during these socially distant times. See this recent report from CBC Canada that features our dealer All-Star Telescope in Alberta: Amateur astronomy lifts off during the pandemic.

Continue reading “This Weekend: Messier Marathon 2021!”

2021 Tele Vue Product Anniversaries!

Clockwise from left (all crops except for comet): twin clusters of blue-white diamonds, with a smattering of glowing red-rubies, punctuate the black velvet background of the Double-Cluster ─ taken with Tele Vue-60is (R. Reeves). The ruby-red glow of ionized hydrogen gas backstops a dark, cold, horse-head-shaped concentration of gas to form the Horsehead nebula ─ taken with a Tele Vue Paracorr Type-2 and 10in, f/4 Newtonian (L. Marinelli). A pearl-pod of Baily Beads glisten on the lunar rim during the 2019 solar eclipse ─ taken through Tele Vue-76 with Tele Vue Powermate (W. Sukwanto). Emerald-green glow of ionized cyanogen and diatomic carbon from comet Lovejoy (C2014 Q2) taken through a Tele Vue-85 (M. Broussard).

For the amateur astronomer, “diamond,” “ruby,” “emerald,” and “pearl” evoke poetic descriptions of eclipses, stars, clusters, comets, and nebulae. They are also the traditional gemstones for the anniversary years of 10 (diamond), 15 & 40 (both ruby), 20 (emerald),  and 30 (pearl). With over 40-years of experience designing and building astronomical products —many in production for decades — we have a few “gems” of our own celebrating notable anniversaries this year. In this blog post, we take a look at current production products that are celebrating anniversaries. Among these products are five Sky & Telescope “Hot Product” awardees (those awards only started in 1998 🙂 ).

Continue reading “2021 Tele Vue Product Anniversaries!”

Tele Vue-85: Imaging Under New York City Light Dome!

Deep sky images and annotated map courtesy of Mauri Rosenthal. All rights reserved. Used by permission.

Mauri Rosenthal’s Tele Vue 2.5x Powermate solar images appeared in our Here Comes the Sun! blog last December. Imaging from just 10-miles (16-km) from New York City, it was reasonable to expect that his flickr and Instagram walls featured images of the Sun, Moon, and Planets. To our surprise, we also saw some images of deep-sky objects (DSOs), taken with a Tele Vue-85, from the same light-polluted location. We were intrigued at how he was able to get such reasonable results from his poorly situated location and asked if he’d relate his experiences in this blog.

It turns out we’d found the right guy for the job. Mauri wasn’t a “typical” amateur astronomer/imager: he actually teaches Urban Astrophotography in New York City, under the auspices of the Amateur Astronomers Association of New York. His instructor’s biography, on a  recent class registration page, describes Mauri’s motivation as follows: 

Surprised by the image quality achievable with small telescopes from his yard in Westchester County, Mauri has been developing deep expertise in Ultraportable Urban Astrophotography and is on a mission to use new technology to extend the access of city-dwellers to the wonders of the night sky.

In this guest blog post, we asked Mauri about his overall experience and how Tele Vue Optics contributes to the enjoyment of his hobby.

Continue reading “Tele Vue-85: Imaging Under New York City Light Dome!”