Laser Engraving Clear Crystal Ball 80mm Glass Ball Customize Image Crystal Ball

 

Material:

Crystal

Product Type:

Ball & Globe

Technique:

Carved

Carving Type:

Laser Engraved

Style:

Folk Art

Use:

Art & Collectible

Theme:

Fairy

Size:

80mm

مؤسسة الكويت للتقدم العلمي 

موسوعة علوم الفلك و الفضاء و الفيزياء الفلكية

This Space Book will explain the basic concepts of space. Space is so vast that it requires a lot of research and learning. Our Earth is a very small part of it.

This book contains many interesting facts and details for our young readers.

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 Introduction to the Night Sky with a Telescope training is designed for new users with no prior or limited experience in operating GOTO telescopes. This is the perfect complement when puchasing a new telescope from Ikarus Technologies.

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

Fashion Astronomy Ball Retro Letters Sphere Reversible Deformed Globe Necklace ring

Material:

Metal, Brass

Type:

Brass

Product Type:

Brass Telescope

Technique:

Casting

Style:

Nautical

Theme:

Nautical

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.