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 » Premium Refractor Telescopes. Coronado Solar Telescopes: 
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 » SolarMax II Telescopes. Opticstar sections: 
 » Cooled, long exposure cameras, 6.1MP CCD, USB 2.0. 
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 » Auto-Guiding systems, complete solutions. Ascension telescopes and accessories: 
 » Apochromat ED Triplet Refractors 
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 » Filter Wheels. Sky-Watcher: 
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 » Telescopes standard series. Farpoint Astro: 
 » Dovetail systems and mount accessories. 
 » Focus masks. 
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 » Autoguiding connectivity kits and interfaces. 
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 » Focus motor controllers.
Meade StarNavigator 90
Meade StarNavigator 90
Meade StarNavigator 90 with DS2000 Generation II mount and Autostar computerized handset.
Opticstar AZ80 GOTO
Opticstar AZ80 GOTO.
The Opticstar AZ80 GOTO is one of the easiest to use entry level computerized telescopes...
Meade Stella Wi-Fi Adapter
Meade Stella Wi-Fi Adapter.
Stella allows you to wirelessly control your computerised telescope with your smart phone or tablet.
Opticstar Eyepiece Set
Opticstar 1.25" Eyepiece & Filter Set.
The Opticstar 1.25" Eyepiece & Filter Set includes 5 Plössl eyepieces, a barlow, 7 filters and a red LED...
Cooled CCD
Opticstar DS-616C XL
The Opticstar DS-616C XL uses the Sony ICX413AQ, 6.1 mega pixel colour CCD (1.8").
Complete with power supply unit and software...
Meade LPI-G Colour
Meade LPI-G colour
The Meade LP-G Colour video camera for imaging and guiding.
Meade LX90 ACF 10" UHTC
Meade LX90 ACF 10" UHTC.
The Meade LX90 ACF 10 UHTC is a 10" advanced catadioptric with a computerised fork mount.
Ascension 80ED Triplet
Ascension 80ED Triplet
The Ascension 80ED Triplet APO from the premium range of
Ascension telescopes. Alumi- nium case and accessories are optional...
Meade ETX90 Observer
Meade ETX90 Observer
The new ETX90 Observer complete with hard carry case and softbag for the tripod.
Opticstar Nebula Filters
Opticstar Nebula filters.
The Opticstar UHC Filters. Deep sky filters that are suitable for visual observation and imaging.
Meade LPI-G Monochrome
Meade LPI-G monochrome
The Meade LP-G Monochrome video camera for imaging and guiding.
Sky-Watcher NEQ6 PRO
Sky-Watcher EQ6 PRO mount.
NEQ6 PRO (EQ6 PRO) is the extra heavy duty, computerised mount from Sky-Watcher with a load capacity of 25kg.
Opticstar PX-125C
Opticstar PX-125C
The Opticstar PX-125C colour video camera for guiding and planetary imaging.
Ascension Accessories
Ascension zoom eyepieces.
The Ascension 1.25" Zoom 7-21mm Eyepiece has fully multicoated optics, actual field of view (35°-52°)...
Astronomy News
Heaviest Stars Are Twins
posted: 29th May 2004
Astronomers with the Harvard-Smithsonian Center for Astrophysics have found the heaviest star ever seen - 80 times the mass of our Sun - and it's got a twin. Located 20,000 light-years from Earth, the two massive stars in WR 20a go around each other every 3.7 days. These two stars are just 2 to 3 million years old, and highly unstable. It'll only be a few more million years before they explode, one after the other as supernovas. WR 20a is part of the Westerlund 2 star cluster, which resides in a region of ionized hydrogen left over from the cluster's formation in the constellation Carina. WR 20a contains two hot, young Wolf-Rayet stars-a type of star that is extremely rare and short-lived.
The gigantic twin stars. [Credit:NASA]
Headquartered in Cambridge, Mass., the Harvard-Smithsonian Center for Astrophysics is a joint collaboration between the Smithsonian Astrophysical Observatory and the Harvard College Observatory. CfA scientists, organized into six research divisions, study the origin, evolution and ultimate fate of the universe.

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Opticstar News
DS-616C XL is Astronomy Magazine's Star Product
posted: 30th January 2015
Opticstar DS-616C XL is Astronomy magazine's product of the year.
DS-616C XL is Star Product

The Opticstar DS-616C XL deep-sky CCD camera has earned the annual star product award from Astronomy, the world's best-selling astronomy magazine. Read about it in the September 2013 issue.

Willmann Bell
Books for Astronomy
updated: 28th July 2016
Willman Bell books.
Acclaimed books from Willmann Bell...
Opticstar News
Imaging Brochure
updated: 10th February 2014
Opticstar brochure.
Download the Opticstar imaging catalogue here.
Centroid Noise And Precision Photometry
Centroid noise.
Centroiding noise is a random error, or "noise" component...
A&M 152mm f/8 Review
"Fantastic Performance" "Beauty of a Ferrari"
updated: 25th March 2009
A&M 152mm f/8 TMB.
Read the latest review about the A&M 152mm f/8 A&M/TMB on Cloudy Nights. According to the review this telescope combines the "beauty of a Ferrari" with "fantastic performance". The review also states that "the manufacturer's claims are valid".
We want to hear your comments.
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updated: 14th January 2016
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