Hi all, it seems russian AA, optician and telescope maker Valeriy Korneev developed a new (presumably) scheme of fast, flat field all-spherical astrograph. You can see his first light, description and photos here (in russian) : http://www.astronomy.ru/forum/index.php/topic,30921.0.html -- Delyan Toshev _______________________________________________ ATM mailing list http://www.atmlist.net/