Istar refractor

Author: mmny

August undefined, 2024

WitrynaTest 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 … 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.

Celestron Omni 150R - Refractors - Cloudy Nights

WitrynaAs 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 … Witryna22 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 … chemistry ite and ate

General Reviews - iStar Optical

Witryna17 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, … 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 … 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 … chemistry iub

$Istar 204mm f5.9 review - Refractors - Cloudy Nights$

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

Witryna29 mar 2015 · While a fast (f/5 or faster) Newtonian of 200mm (eight-inch) aperture or more is a good rich-field telescope, an achromatic refractor of similar specifications can do considerably better, owing … 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 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 … flight from nz to indiaWitryna30 lis 2008 · Posted 25 September 2012 - 07:10 PM. The "received view" is that refractors are better than reflectors for observing doubles. That said; an 8" refractor is huge and an 8" reflector can be small. An 8" reflector, well collimated and with a descent mirror, will split doubles that a 4" refractor will not. chemistry it takes two/solid dream/move on

"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 … " - Istar refractor

Istar refractor

$New Istar optical APO refractor - Refractors - Cloudy Nights$

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 … 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 …

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Witryna2 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 … 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 …

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. 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, …

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 … 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 …

Witryna10 sie 2010 · It seems to be one-of-a-kind except for maybe the Istar Optical Phoenix WFT 150mm F/5 refractor. And the Vixen is a little less expensive. Back to top #10 SeattleScott SeattleScott. Hubble. Posts: 14,854; Joined: 14 Oct 2011; Posted 18 June 2012 - 11:07 PM. The NA 140 is a very unique instrument. ...

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 ... chemistry ite endingWitryna9 sie 2009 · New Istar Optical APO 140 f6.5 - first light - posted in Refractors : Istar Optical made new lens Apochromat triplet 140 f6.5 (will be deliver together with Apex 5-elements reducer/flattener - effective ratio f4.2). I received from my friend first picture from this lens and notes: I was able to get an image of M31 with the 140 triplet last night. flight from ny to ukWitryna30 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. chemistryis universalWitryna17 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 … flight from oaj to piaWitryna4 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 … flight from nz to australiaWitryna11 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. chemistry iu bloomingtonWitryna3 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. flight from ny to west palm beach