ZWO Five Position EFWmini Filter Wheel- 1.25" or 31MM

• The smallest and most lightweight 1.25‘’Electronic Filter Wheel in the world! 300g ONLY ! Small than your hand !
• The body is CNC machined from a full block of aircraft grade aluminium. Very thin design, 20mm ONLY
• Supports both 5*1.25‘’ filters or 5*31mm filters The Electronic Filter wheel can be rotated in both counter clockwise or clockwise direction for filter selection.
• Only one USB Cable is enough to power up the EFW, the max power consumption is around 120ma@5V, so you can connected it form the USB2.0 hub of our cooled cameras.
• The distance between the filter and sensor is aroucnd 10mm when you connect it to ASI1600. So 1.25? filters won?t have vignetting up to F5 focal ratio scope and 31mm filter won?t have vigentting up to F2 lens Our new RGBL filters are recommended to work with ASI1600, it will offer nearly 1:1:1 RGB color balance.

• Reduce glare and increase contrast of the Moon with the Celestron 1.25” Moon Filter
• Also useful for extra bright planets as well as terrestrial viewing over sand or snow
• Threads onto most 1.25” eyepieces in seconds

• T-Ring attaches to E-mount Sony mirrorless camera bodies
• Works with Celestron T-Adapters
• 42mm female diameter thread
• Sturdy bayonet flange locks for a secure fit

This T-Ring fits Sony E-mount mirrorless cameras only. It will not work with other Sony A-mount camera bodies without adding a Sony adapter to convert those cameras to E-mount.

• The Celestron Universal T-Adapter connects a DSLR or SLR camera to a refractor for prime focus photography
• The adapter’s chrome barrel slides into any focuser that accepts 1.25” accessories
• T-Threads accept camera brand specific T-Ring (sold separately)

مؤسسة الكويت للتقدم العلمي 

موسوعة علوم الفلك و الفضاء و الفيزياء الفلكية

Are you a serious amateur astronomer looking for the best and brightest wide-field images of the night sky with binoculars? The Orion 20x80 ED GiantView Binocular will fit that bill! These binoculars combine a large 80mm aperture with Extra-low Dispersion (ED) glass lenses for bright, exceptionally clear, true-color views of the night sky. Not to mention these binoculars work equally well for long distance daytime viewing. All of this in a waterproof body, with BAK-4 prisms, robust mechanical construction, and a solid pier tripod mounting system. And all these features for a very reasonable price.

You'll understand the combination of large aperture and ED lenses the first time you scan the Milky Way — pinpoint stars, with exceptional contrast against a dark background. Fully Multi-Coated surfaces provide the brightest possible images, and with 18mm of eye relief, even eyeglass wearers can view the entire field of view. And these binoculars boast a 3.2° field of view for scanning the skies, or watching distant wildlife.

The sturdy aluminum alloy body with a second hinge between the objective lenses provides a solid, well collimated mechanical system. Glare-threaded and blackened interiors provide even more contrast with less light scatter. The built-in tripod mounting bar attaches securely to a standard photographic tripod, and each binocular comes with lens caps, neck strap and a soft carry bag.

• Corrects for field curvature, allowing the Evoguide 50ED and 50DX to be used for astrophotography
• Thread on metal caps
• T-thread connection or 1.25" opening for camera mounting
• 28mm imaging circle
• 17.5mm back focus
• 5.33 x 3.57-degree field of view when used with APS-C crop sensor 

معجم شامل يغطي كافة جوانب علم الفلك

أكثر من 1000 تعريف موجزز مع إحالات مرجعية واضحة.

ما يقرب من 200 صورة فوتوغرافية ورسوم توضيحية ملونة عالية الجودة

نحو 30 جدولا يحتوي على معلومات مفيدة، و التي تشمل بيانات الكواكب التسعة الرئيسية.

و كذلك أهم كوكبات النجوم و الوبول النيزكية

• Equatorial wedge for Celestron NexStar 6/8SE and Evolution Alt-Az mounted computerized telescopes
• Enables long exposure astrophotography and autoguiding by tilting the telescope’s azimuth into an equatorial platform allowing it to track an arc around the polar axis.
• For beginner to intermediate planetary and deep space imagers
• Captive hardware, tool-less operation, easily adjusts under load
• Hefty yet portable design
• Sturdy latitude adjustment screw with easy to read scale and integrated Bubble level

The ZWO LRGB  36mm filter has better transmission, better coating,  better color separation

the RGB color combine weights will be approximately 1:1:1

• Fine-optically polished to ensure accurate 1/4 wavefront
• more than 92% transmission at passband
• Infrared wavelength 700-1100nm cut-off
• Precision off-band blocking
• Multi-layers anti-reflection coating
• Small spectral “gap” to minimize effect of light pollution
• More parfocal – thickness  2mm

New EOS -T2 Adapter suitable for all ASI cameras

• The ZWO-EOS-T2-Ⅱ adapter is an EOS-T2 adapter and a 5 mm length T2-extender.
• It is suitable for all ASI cameras.
• This Version Ⅱ is nonadjustable and supports a Canon EF lens only.
• Without the T2-extender it suites the 17.5 mm backfocus distance of many ASI cameras. (Note: This excludes the ASI6200 cameras.)
• With the T2-extender it is suitable for all 12.5 mm backfocus ASI cameras.
• You can use a 2-inch IR-CUT filter with the adapter.
• More information below.

This pocket-sized device is an all-around astronomer/astro-photographer companion.
Smaller than the size of a cigarette box, and equipped with a variety of digital sensors, can precisely report the ambient temperature, humidity, pressure, cloud height, cloud coverage, astronomical daw, twilight time, and the night sky brightness.

Uranus Meteo Station is housed in high quality, blue aluminum anodized shell.

• Revolutionary new stereo binocular viewer design has big advantages over traditional binoviewers
• With zero backfocus requirement, can be used with any type of telescope - even Newtonians - without need for extender lenses
• Features a dielectric-coated beam-splitting mirror - not a prism - which reduces aberrations and improves contrast
• Twist-tight collars on the eyepiece holders are self-centering to eliminate problematic eyepiece offset.
• Use any two 1.25" eyepieces (sold separately) for 3D-like, immersive views of astronomical and scenic daytime subjects

Pier Extension for AM5 Mount

• Compatible with mainstream auto guiding cameras; 1.25in and M42 mount interface designed for compatible with SV305 Pro and for Orion ZWO QHY and so on auto guiding cameras(Some camera models require additional accessories to assist in focusing)
• Sharp image; Ultra wide band fully multilayer coated lens; double glass and the 30mm achromatic optics prevent irritating reflections can bring you bright and clear images
• 45mm back focus distance; Allows easy and precise focus adjustments and f4 aperture optics provides a very wide field of view which will help to quickly find the target when performing astronomical observations
• Nylon-tipped thumbscrews; Comes with the mounting rings with plastic tipped screws as not to scratch the scope tube and it can be moved to any position
• Quality craftsmanship; By using high-level CNC metal processing technology; SV165 guide scope has exquisite appearance; delicate feel and beautiful shape; fine workmanship bringing you visual enjoyment