Happily Serving You in the Same Location for Over 58 Years!


Denkmeier - Denk Hi Def OIII Nebula Filter 2 " format

Model#: HD_OIII_2

Be the first to review this product

Availability: In stock


Manufactured by: Denkmeier Optical

Denkmeier - Denk Hi Def OIII Nebula Filter 2 " format


 DENKMEIER OPTICAL  -  Denk 2" Hi-Def OIII Nebula Filter

  • A Hi-Def OIII Filter brings out luxurious contrast in gaseous emission nebula.
  • 48mm male threads for 2" Eyepieces or any adapter with female 48mm threads. 
  • Works perfectly in Denk Filter Switch systems. 
  • DENKMEIER makes nebula filters in-house in the USA for the amateur astronomy community.


                                                                                 Denk Hi-Def OIII Transmission Profile














Product Series

The 'Square' Transmission Curves of our Denkmeier Hi Def Filters that are illustrated above mean that only the photons in the desired emmission bandpasses of the observed object are contributing to the view. Therefore, red halos around stars will not be present. A more natural and contrasty view is the result. Our Hi Def Filters are made to exacting standards through a coating technology known as Ion Beam Sputtering (IBS). These filters are made on site at the Spectrum Thin Films Facility in NY with state of the art coating chambers. Our filter glass is polished to better than Lambda/8 and coated with our best anti-reflective dielectric material for less than 0.25% reflection. Note the amazing 98%+ transmission percentages illustrated in the light curve profiles at the intended bandpasses of these filters.

Additional Information

Name Denkmeier - Denk Hi Def OIII Nebula Filter 2 " format
Manufacturer Denkmeier Optical
Model HD_OIII_2
Additional Information Spectrum IBS coatings
Diameter 2"
Filter(s) Hi Def OIII Nebula
Optical Coatings Multi-coated dielectric