星河科研社为Sharpstar / Askar锐星光学的香港独家总代理。 Sharpstar Z4 摄星镜及 Askar 65PHQ折射式摄星镜已到货并于eshop上架。

Galaxy Scientific Group is Hong Kong sole dealer of Sharpstar and Askar. The new Sharpstar Z4 Refracting Astrograph and Askar 65PHQ Refracting astrograph are now in stock and available on the eshop.

Sharpstar Z4 折射式摄星镜，定价HK$13800。

Sharpstar Z4 Refracting Astrograph, priced at HK$13800.

Askar 65PHQ折射式摄星镜，定价HK$7780。

Askar 65PHQ Refracting astrograph, priced at HK$7780.

Sharpstar 新推出的一体式望远镜Z4口径为100mm，焦比f/5.5。使用了全镜哑光灰色设计，单个抱箍上端自带提手，方便携带和装配。提手为卡槽式设计，可安装有底座的寻星镜等。Z4采用前三片加后三片的六片式设计，其中两片为ED玻璃。与Sharpstar其他系列摄星镜一样，Z4也承袭了自平场设计，在使用时无需费心计算后截距，合焦即可进行拍摄。

Sharpstar’s new astrograph Z4 has an aperture of 100mm and the focal ratio is f/5.5 with matte gray coating. The tube ring has a handle on the top which is easy to carry and assemble. The handle is designed as a slot on which you can mount a finder base, etc.  Z4 is a sextuplet astrograph with three pieces of lens at the front and three pieces at the back, and two of them are ED glasses. Just like other series of Sharpstar astrographs, Z4 is designed as self-flattened so there is no need to calculate the back focus. You can just make the target stay at the focus, and the optical system is perfect for imaging.