New! Denkmeier Optical presents our HI Def Filters. Coated in our Spectrum Thin Films Laboratory in Hauppage, NY. All Denkmeier HI Def Filters are made with the highest quality glass, polished to Lamda/8 or better and anti-reflective Dielectric coated. On sale now!
Special Introductory Pricing (Shipping Additional)
2" OIII and UHC Filters Regular Retail: $249 Now, $185!
New Planetary 1.25" Filters Regular Retail : $149 Now, $125!
1.25" OIII and UHC Filters Regular Retail Price: $125 Now, $99!
Plus, a Special Internet-Only Offer:
Yes, for a limited time only, order any Denkmeier Hi Def Filter here at our Denk Online Store and an additional 10% Discount will be deducted from your shopping cart price!
Introducing Our New Denkmeier HI Def Nebula Filters
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.
New Denkmeier HI Def Planetary Filter
Format: 1.25 inch
Cell: 1.25" Threaded Machined Anodized cell 
Material: High Quality Grade A BK7
Wave Front: Lamda/8 Ultra low distortion
Polish: Precision Polished Ultra-Smooth Optical Surfaces
Surface Quality: Scratch/Dig 40/20 Beveled on All Edges
Coatings: Coated on both sides to Block UV to 460nm(Blue) and 530nm(yellow)
Spectral Properties: Transmission occurs at 490-530nm and 590- 700nm
Filter Coatings: Ion Beam Deposited, Multi Layer Dielectric
Hardness: Very Hard and Durable for worry free cleaning
This All Dielectric coated filter is a very unique contrast enhancement filter. See brighter Greens and Reds. This enhancement filter will greatly improve the contrast of Mars, Jupiter and Saturn.
Denkmeier HI Def Filter Coating Curves
Denkmeier HI Def UHC Filter
Denkmeier HI Def OIII Filter
Denkmeier HI Def Planetary Filter
The Ion Beam Sputtering Coating Chamber at Denkmeier/Spectrum Facilities. Maria monitors data during a coating run.
Regular Filter Prices:
Denkmeier HI Def 2" UHC or OIII Filters: $249
Denkmeier HI Def UHC or OIII 1.25" Format $149
Denkmeier HI Def Planetary FIlters $125
