----------------------------------- Tavi F. 14 Noi 2007 20:47 ----------------------------------- Pentru ca a ramas in suspensie problema neoacromatelor, dau un citat: • Petzval – doublet objective lens with another doublet near the eyepiece end (Takahashi FSQ-106, Tele Vue Genesis and NP-101). Vixen also used the Petzval design in its “Neo-Achromats”, though the color correction is not considered as good as in the Takahashi and Tele Vue. De la link-ul: http://www.bpccs.com/lcas/Articles/achromats_and_apochromats.htm Daca exista vreun posesor al instrumentului in cauza, si vrea sa-i contrazica, poate sa o faca. Distanta focala a grupului frontal ar fi un element interesant.