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Still not sure what is the right gear for you?
Read our 101 article or get in touch. We will be glad to help.
Add description, images, menus and links to your mega menu
A column with no settings can be used as a spacer
Link to your collections, sales and even external links
Add up to five columns
Add description, images, menus and links to your mega menu
A column with no settings can be used as a spacer
Link to your collections, sales and even external links
Add up to five columns
Add description, images, menus and links to your mega menu
A column with no settings can be used as a spacer
Link to your collections, sales and even external links
Add up to five columns
Add description, images, menus and links to your mega menu
A column with no settings can be used as a spacer
Link to your collections, sales and even external links
Add up to five columns
Add description, images, menus and links to your mega menu
A column with no settings can be used as a spacer
Link to your collections, sales and even external links
Add up to five columns
Add description, images, menus and links to your mega menu
A column with no settings can be used as a spacer
Link to your collections, sales and even external links
Add up to five columns
SKU : DF-E-120N80
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Product Details
The DayStar 80 mm Energy Rejection Filter is for on-axis use with a refractor and/or Maksutov-style telescope OTA. This filter has an outer diameter of 120 mm, fitting around your telescope OTA, while the filter window itself has a diameter of 80 mm.
Energy Rejection Filters reduce the heat load on your filter assembly by absorbing or reflecting UV and/or I light and transmitting light in the desired visual spectrum. These filters are sometimes Red or Yellow glass, or dielectric IR and UV, but pass light in the desired visual spectrum. The ERF can also serve as an aperture mask to accomplish a straight angle of incidence for light entering the filter.
DayStar filter assemblies operate best at f/30 and slower.
specifications
Filter Type | Energy Rejection |
Solar Filter | 80mm |
included items