Istar refractor

Author: ysey

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 … Witryna8 maj 2009 · There doesn't seem to be a great deal of difference but the Dob will usually win on shear light gathering ability. I just ran the numbers (in the Calculator) for my 127mm (5") iStar refractor and my 16" GSO dob and the limiting magntude difference (at 200x) was 14.6 for the refractor to 16.2 for the dob, not a great deal of difference, …

7" (180mm) Refractor - Discussions - Stargazers Lounge

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. 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. harry mens business class uitzending gemist

a good DSO refractor? - Refractors - Cloudy Nights

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 ... 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 … 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 … charla bulls for sale

iStar WXT 204-6LT refractor review – Astronomy Now

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 … 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 … harry mental issuesWitryna17 wrz 2016 · Page 1 of 2 - Istar 150mm F/8 Refractor - posted in Refractors : I’m fairly new to this site and wanted to post some pictures and comments on my Istar 6” f/8 anastigmatic refractor. I purchased the lens in cell (150mm F/8 R35 Slim) from Istar last year with the intention of building a scope around it. I am fairly new to astronomy, … harry mends his wand

"WitrynaiStar’s newly designed and produced Phantom FCL 140-6.5 is the first-ever imaging Super APO refractor with fully detachable 80 mm rear section to allow for the use of … " - Istar refractor

Istar refractor

$iStar WXT 204-6LT refractor review – Astronomy Now$

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. Witryna6 kwi 2024 · With the use of the browser it is possible to: browse data concerning goods nomenclature, duty rates and other measures, and also additional information (this third category includes: Legal Notes, Explanatory Notes, Binding Tariff Information and Lists of Goods, Classification Regulations, Explanatory Notes for CN, Classification Rulings of …

Did you know?

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. Witryna20 sty 2012 · Celestron Omni 150R - posted in Refractors : Ok guys & gals.... Looking to hear some thoughts on the Celestron Omni 150R. I have been looking at this for awhile & I am about to pull the trigger. ... just as the 150 F/5 is. The Istar 8" F.6 claims 40 pounds for the OTA only, so maybe closer to 45 pounds fully loaded. Id imagine a 9" F/6 …

WitrynaiStar 127 mm (5”) R30 F/12 Doublet Refractor Review. My first telescope was a refractor. As a star struck 8-year-old it represented the ideal image of how a …

Witryna2 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 … 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 …

Witryna17 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 …

WitrynaI have been an amateur astronomer since 2002 and have owned just about every type of telescope commercially available. These include 8, 11, and 14-inch SCTs, 4” ED apochromatic refractor, and 15” Dobsonian. charla burtenshawWitryna2 gru 2024 · The Phantom FCL 140-6.5 is, therefore, a great all-round refractor, and the manufacturer has promised to remedy the minor mechanical issue with the amount of … harry meredith washington ncWitrynaThe Stupid Astronomer on Instagram: "This morning was calm and crisp ... harry mens chanelWitryna30 mar 2024 · drd715, on 05 May 2024 - 04:12 AM, said: Istar is currently near the production of a 140mm triplet F-6.5 lens cell (5 test samples were completed so far) and a 160mm CaFl doublet is up next. Both are near first run production. The cells will be offered first (soon) with complete OTA's near end of the year or early next year. charlaćWitrynaAs 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 … charla burnettWitryna6 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 … charla burnsWitryna27 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 telescope is great - it has three long mounting rail for other equipments like finder, solar telescope, pointing telescope and etc. Is very immune against wind and cool down very fast.This … charlachouteawv60 gmail.com