Paracorr Type-2: Imaging the Skies with Luca Marinelli

This week’s guest blog post is by Luca Marinelli. He images the sky with a Teleskop Service ONTC 10″ Carbon Tube f/4 Newtonian equipped with our Tele Vue Paracorr Type 2 coma corrector.

The Rosette Nebula (NGC 2244): Animals on Parade by AstroBin user Luca Marinelli. All rights reserved. Imaged through Teleskop Service ONTC 10″ f/4 Newtonian with Tele Vue Paracorr Type 2 coma corrector and ZWO ASI1600MM Pro mono camera. The narrowband filters used for imaging reveal various layers of material within the heart of the Rosette. The resulting dimensional quality draws the viewer from the ruddy edges of the nebula into the aqua-colored center and then out the “back” aperture of the structure. Filters used in this Hubble SHO palette image were: Astrodon Narrowband 3nm: Ha (26×300″, 44×360″), OIII (74×360″), SII (4×300″, 54×360″) with Gain: 139, Offset: 50 for a total integration time of: 19.7 hours. Software: Main Sequence Generator Pro, PHD2 Guiding, PixInsight 1.8, & Photoshop CC.

I have been interested in photography since a very young age. I remember learning to take pictures with my father’s Russian-made Zenit-E 35mm fully-manual SLR (you had to remember to close the iris by hand before shooting to set the desired aperture!) when I was in elementary school. I have pursued nature and adventure photography ever since and some of my images have been published.

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Al’s Stellafane 2019

The annual Stellafane convention, organized by the Springfield Telescope Makers, took place August 1 –4 around their clubhouse on Breezy Hill in Springfield, Vermont. This year, Al brought the Apollo 11mm eyepiece and the TNV/PVS-14 Night Vision monocular to the field. He got great comments on both. Presented here is Al’s Stellafane in pictures.

*Here’s a painting I commissioned by Hulan Fleming of my family attending Stellafane in the early-1990s’.
“Most exciting and encouraging throughout my life has been my annual pilgrimage to Stellafane, where in 1958 my 8-inch received 3rd prize in mechanical excellence. Years later, I rebuilt the scope into a 12-inch f/5.3 and received 1st prize for Newtonians at the 1972 Stellafane.” – Al Nagler. From “Star People – Real People in Astronomy.” Amateur Astronomy #6
Alan Ward of Ontario bought his portable mirror coating equipment to Stellafane.

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Astro Sketching the Universe!

Sunspots Active Region 2403 by Instagram user Pekka Rautajoki. All rights reserved. Active Region 2403 from 2015 on August 23rd (13:00 UT), August 24th (12:15 UT), and August 28th (13:40 UT). Sketched through Tele Vue-85 refractor @85x; white light filter, no tracking. Pencils on white paper, East-West mirror images. “What a wonderfully complex sunspot group! “
We posted some Instagram sketches of the July 2019 Total Solar Eclipse from Chile last month made by Pekka Rautajoki — who traveled all the way from his native Finland to be there. We found a trove of blog-worthy images, he posted on Instagram, made with Tele Vue eyepieces and  Tele Vue-85 APO refractor. They encompass a broad range of objects from the northern and southern hemispheres. So, it was only inevitable that we invited him to write a guest blog post based on his exquisite work! 

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Tele Vue APO Design and Build “Secrets”

Over the years, we’ve seen conversational topics in online amateur circles that repeatedly crop up concerning the definition of apochromatic refractor, triplet vs. doublet design, and how glass designation might define performance.  We expect these questions to continue to appear as new amateurs discover the hobby. So bookmark this blog post because here you’ll find notes on Tele Vue’s philosophy and build practices concerning our telescope line of 100% APO refractors.

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