astrograph – Astronomy Now

Celestron RASA 8 astrograph: fast imaging with the RASA 8

22 February 2024 Astronomy Now

Olly Penrice has spent over a year imaging with a Celestron Rowe–Ackermann Schmidt Astrograph (RASA) and finds that, with some fiddling required, it excels at capturing high-quality data of deep-sky objects.

SharpStar D 150mm f/2.8 HNT: An imaging telescope with sharp vision

27 May 2020 Ade Ashford

Until comparatively recently, your best tool for capturing wide-angle vistas of extended deep-sky objects with a full-frame DSLR or CCD/CMOS camera was a fast prime lens from one of the big-name players in photography. Now you can attain these swift imaging speeds with hyperbolic Newtonians, such as the SharpStar 15028HNT.

Vixen Optics VSD 100/f3.8 ultra-fast astrograph

4 April 2015 Steve Ringwood

Astrophotographers seeking an ultra-fast refractor designed for exquisite digital Imaging may wish to consider this 100mm aperture, 5-element f/3.8 system from Vixen, appraised by Steve Ringwood.