

-----------------------------------

zoth

15 Mar 2012 13:42



-----------------------------------

Pretul mic al acestei prisme poate avea doua motive:
- este construita pe format mic (1,25")
- din descrierea facuta de TS se pare ca nu include blocul suplimentar de filtraj care este absolut obligatoriu  :!: 

Safety Note:
The Herschel prism alone provides not enough filter effect for safe solar observation. According to the observatin mode (visual / imaging), additional filters are necessary. At least, a ND3 neutral density filter + polarizing filter (or Baader Solar Continuum filter) is recommended for visual observation. These filters are listed in the accessories section.

Pentru lamurirea aspectului puteti revedea si topicul "Construiti un helioscop Herschel"

