Agena astroproducts5/6/2023 ![]() ![]() The focuser is a solid and smooth 2.5-inch rack-and-pinion with 10:1 dual speed and 60mm of focus travel. In-focus stars exhibited textbook Airy disks. There was no sign of astigmatism, even on cold winter nights when lens cells can pinch optics, and only a smidgen of spherical aberration. This is color correction that ranks with the best in the world of apos. The limbs of the Moon, Venus and bright stars showed no chromatic aberration when in focus, with Venus and bright stars showing just a pale rims of magenta inside focus and cyan outside focus. Upon unboxing, the striking red finish caught my eye, and the view through the eyepiece lived up to that favorable first impression. The smallest of the trio that I tested is the 76mm EDPH, a triplet ED apochromat with a focal ratio of f/5.5. ![]() I had a chance to test three new SharpStars, provided on loan from my local telescope dealer including the 100QII astrograph and the big 140PH APO refractor. The company’s telescopes have been sold worldwide under various brand names, but their own SharpStar line includes a growing array of premium refractors at attractive prices. SharpStar is a new brand in the astronomy marketplace from the Jiaxing Rui Xing Optical Instrument Company in China. Who Is It For? Anyone looking for a compact, premium travel telescope for both observing and astrophotography. Summary: The SharpStar 76EDPH (MSRP: $829) is a beautifully finished triplet apochromatic refractor presenting color-free images for visual use and, with the optional f/4.5 flattener, a wide flat field for photography.
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