Istar refractor

Author: qefo

August undefined, 2024

WitrynaAchromatic refractors have been used extensively in the past. In particular long focus refractors are interesting for reduced chromatic aberration. In this brief report1 a test … Witryna11 lis 2024 · Published: November 11, 2024 at 2:26 pm. Taking delivery of a telescope like the Istar Perseus AT150-12, you really start to grasp the significance of the numbers 150mm and f/12. This is a very big refractor, and an impressive sight to say the least. The Istar is designed and manufactured mainly in the Czech Republic.

Istar refractors Pros and Cons? - Refractors - Cloudy Nights

Witryna30 gru 2008 · Page 1 of 5 - Istar 8 F/6 - posted in Refractors : Im really excited! Just placed an order through High PointScientific for Isatr NEW{REDUCED WEIGHT}8" F/6 Comet Hunter. Mike at Istar said including rings the weight should be around 30lbs with the overall all length at 48".Should be here in about 4-5 weeks. Ill let you know then … Witryna4 maj 2011 · Page 1 of 10 - Astro Telescopes 102mm (4) f/11 Refractor - posted in Refractors : Since I still have a wait on my new Istar refractor I needed something to hold me over so I ordered the Astro Telescopes (Kunming United Optics) 4 F11. Ive read a view reviews so far and all have been positive. Some have said the focuser is very … frederick the great blanning

General Reviews - iStar Optical

Witryna18 wrz 2010 · One thing is always true about early adopters though. Version 2.0 is always superior to version 1.0 because the manufacturer addresses issues that come to light with early adopter use. Typically improved feature sets, additional content and a lower price are what early adopters miss out on. WitrynaThe Stupid Astronomer on Instagram: "This morning was calm and crisp ... Witryna15 maj 2013 · Refractors Reviews. REVIEWS. iStar Optical’s Phantom FCL 140-6.5. tested and written by Josef Ladra, Sep-24, 2024. I have no financial or other interest … frederick the great and catherine the great

$istar 8" f/8.8 telescope - Refractors - Cloudy Nights$

iStar Optical’s Phantom FCL 140-6.5 review - User Reviews

WitrynaRecently iStar Optical became a registered supplier of optics for the prestigious STAR Labs of Lockheed Martin Aerospace and Defense Company. ... as well as by … Witryna6 sty 2004 · Page 1 of 3 - Istar 127mm f12 R30 Review - Neil English - posted in Refractors : For those interested, this review can be seen through the Istar website.I … blind justice stanceWitryna7 lis 2024 · a good DSO refractor? - posted in Refractors : I was wondering about a good refractor for DSOs? Visual only, low to medium power. I was thinking a quality achromat might work but, not willing to do f/15. I am thinking of 6 - 8 aperture. .. something to rival 8-10 newts in performance. Ive enjoyed viewing through refractors … frederick the great and napoleon

"Witryna27 kwi 2005 · Page 1 of 4 - Istar Asteria TCR 204-8 R35 - posted in Refractors : I prepare small test this telescope and I am very excited from it. Construction the … " - Istar refractor

Istar refractor

$Istar refractors Pros and Cons? - Page 5 - Cloudy Nights$

Witryna18 paź 2010 · I purchased an Istar 6" F15 achro lens a few weeks ago to use in a folded refractor on a dob mount I plan to build this spring and summer. Chose the Istar … WitrynaRefractor. A refractor is a telescope with a lens in the front that captures the incoming light and converges it to a focal point by refraction. There are roughly two types of refractor telescopes; achromatic and apochromatic refractors. Achromatic refractors have a dual lens element design.

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WitrynaiStar 127 mm (5”) R30 F/12 Doublet Refractor. My first telescope was a refractor. As a star struck 8-year-old it represented the ideal image of how a telescope should look. It was a model 9TE-5 Tasco 60 mm (2.4-inch) f/11.7 700 mm focal length alt-az telescope sold by Sears, Roebuck and Company. It was advertised disproportionally as a 234X ...

Witryna166 Likes, 7 Comments - The Stupid Astronomer (@simon2940) on Instagram: "The 204mm iStar refractor pointed at the #sun can produce some stunning images if seeing conditio..." The Stupid Astronomer on Instagram: "The 204mm iStar refractor pointed at the #sun can produce some stunning images if seeing conditions support such a large … Witryna24 paź 2008 · What size ERF? - posted in Solar Observing and Imaging: This might be insane, but hopefully you all can shed some light on my idea. I have an 8 f6 istar refractor with a 3.5 feathertouch focuser and an Earthwin Binoviewer system that uses 1.7x and 2.5x barlows. To keep tube currents down Im thinking that a 90mm ERF …

Witryna18 maj 2016 · This yields 88% transmission. This corresponds to the light transmission of an unobstructed 7.51" refractor with perfect transmission. In reality, an air-spaced doublet has 4 surfaces with (ideally) 0.2% loss, or 0.8% total. Modern optical glasses have very low transmission losses, so these losses can be ignored. Witryna11 maj 2011 · 8 inch Istar Scopes on Sale! - posted in Vendor and Group Announcements: On Sale! Phoenix WFT 204-6 Comet Hunter Achromatic Doublet - $2994 On Sale! ... Today I've just aquired a Losmandy G11 mainly for the purpose of handling my soon to be built (by me!)homemade Istar 8" 8.8 refractor. Just waiting …

Witryna3 paź 2007 · HI. I do not know that beside myself, anyone else has purchased the ISTAR-OPTICAL 8" F8.8 achromatic refractors scope from Ales. This is a big and massive scope, at 6Ft long, without the dew shield, and weighing 45 lbs for the OTA alone. It needs 3 person to carry and mount it onto my losmandy CG11.

WitrynaSoon, all iStar achromats will feature the R30 option, including apertures from 127-mm up to 250-mm. Better yet, the R30 option adds only about 25 percent to the cost of … frederick the great beliefWitryna2 sie 2024 · Posted 08 August 2024 - 05:32 PM. Heya, I don't think D&G are still dropping scopes on your door step often enough. You could look into an iStar Optical objective lens of your choice. And then have Siebert Optics make the OTA (they do custom modular refractor OTAs and you supply the lens). That said, I would really … frederick the great educationWitryna17 sie 2009 · Page 1 of 2 - istar 6 inch f12 - posted in Refractors : Ive been using the istar a few times lately and have been happy with how its gone. Ive had it a few years … frederick the great and potatoesWitrynaTest of iStar Optical 150mm F15 achromatic refractor. by Bartolomeo Montrucchio, Italy Perseus AT 150-15 OTA. Report by member „Rutilus“ at www.cloudynights.com. Very short report on my iStar 150mm f/15. Last night I was observing a few double-stars and the scope was taking high magnification very well. The scope seems to have a real … frederick the great enlightenmentWitryna22 kwi 2009 · Thoughts on Istar 180/1440 Refractor - posted in Refractors : I have recently completed a Berry mount for my 2014 lensed Istar 180 f-8 Achromat. Over the past fortnight I have enjoyed some good viewing using this large lensed refractor in my back yard in Suburban Auckland. Last evening I viewed split Sirius at 131 X and 180 … blind justice torn souls hurt faithsWitryna26 lis 2006 · Page 1 of 2 - Istar 204mm f5.9 review - posted in Refractors : Finally got this little beast under some proper dark skies last week. This review is by no means an authoritative critique; rather a gentlemans observation of some very affordable and very nice glass. First off heres the business end, followed by a home-built OTA cut down … frederick the great fanservantWitrynaAs you may know the weight of the original classic construction Perseus AT 150-12 refractor, excluding mounting rings and dovetail, is 14.47 Kg (31 lbs.). While this is … frederick the great erb