View Single Post
  #98  
Old 25-09-2017, 07:04 PM
Merlin66's Avatar
Merlin66 (Ken)
Registered User

Merlin66 is offline
 
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
I agree with the larger aperture, but slit spectroscopes need f10. They don't work effectively at faster f ratios...
Reply With Quote