Thread: Review: Baader 2” Cool Ceramic Safety Herschel Wedge
View Single Post
  #10  
Old 31-03-2013, 01:23 AM
Merlin66's Avatar
Merlin66 (Ken)
Registered User

Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Gavin,
The Herschel wedge is regularly used on 150mm achromats.
It has been used in observatories with apertures up to at least 200mm.
It's a 100% safe to use with the appropriate secondary ND filters after the wedge.
Reply With Quote