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The collection of pictures for the astronomical calendar has ended, click to view the list of winners.  ...

In general, do not use drying tubes unless condensation is confirmed on the camera.  ...

We need your ideas ！  ...

SV202 8X42 ED Glass Binoculars adopts magnesium alloy mirror body, which is anti-oxidation, crack resistance, high and low temperature resistance, and extends service life.  ...

Some tips about our promotion  ...

MK105 Maksutov-Cassegrain Telescope exchanges the conventional front corrector plate of a Schmidt with a convex meniscus lens, resulting in a smaller secondary mirror that limits obstruction and increases contrast, while eliminating the need for periodic collimation.  ...

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SV705C adopts IMX585 CMOS color sensor. It features a large sensor format of 1/1.2”, the pixel size is 2.9μm*2.9μm, a high resolution of 8.30 Megal Pixel (3586*2180). EQ peak can reach ≈ 90%  ...

SV605CC adopts double-layer semiconductor refrigeration, which can cool to 30 ℃ lower than the ambient temperature. The refrigeration function can only work when 12V external power supply is connected.  ...

High-reflection dielectric coating process , double star-seeking dovetail groove design....MK105 was the first Mak telescope we released and our first foray into planetary telescope development.  ...