EXPLORE SCIENTIFIC 1.25" ND0.9 Gray Filter reduces brightness and increases contrast for accurate observation of bright objects
Specification
  • Total length (mm): 31
  • Total width (mm): 31
  • Total height (mm): 11
  • Net weight (without access.) (g): 8
  • Extended warranty (years): 10
  • Telescope filter type: Color Filter
21,90 € * Shipping Weight 0.035 kg
Specification
  • Total length (mm): 200
  • Total width (mm): 200
  • Total height (mm): 60
  • Net Weight total (incl. accessories) (g): 115
  • Colour: black
  • Extended warranty (years): 5
21,90 € * Shipping Weight 0.2 kg
The EXPLORE SCIENTIFIC UHC filter allows the observation of low-light deep sky objects
Specification
  • Eyepiece Barrel Diameter (mm): 31.7
  • Extended warranty (years): 10
  • Telescope filter type: Nebula Filter
55,00 € * Shipping Weight 0.26 kg
Filter Set 3 Moon & Planets from 150mm (6")
Specification
  • Net Weight total (incl. accessories) (g): 44
  • Material: Aluminium
  • Extended warranty (years): 10
  • Telescope filter type: Color Filter
45,00 € * Shipping Weight 0.2 kg
Specification
  • Total length (mm): 200
  • Total width (mm): 200
  • Total height (mm): 60
  • Net Weight total (incl. accessories) (g): 115
  • Colour: black
  • Extended warranty (years): 5
29,90 € * Shipping Weight 0.2 kg
Specification
  • Net Weight total (incl. accessories) (g): 44
  • Material: Aluminium
  • Extended warranty (years): 10
  • Telescope filter type: Color Filter
45,00 € * Shipping Weight 0.2 kg
Color Filter Set Red,Green,Blue,Yellow
Specification
  • Net weight (without access.) (g): 5
  • Colour: red,, green,, blue,, yellow
  • Material: Plastic
14,90 € * Shipping Weight 0.03 kg
Specification
  • Total length (mm): 200
  • Total width (mm): 200
  • Total height (mm): 60
  • Net Weight total (incl. accessories) (g): 115
  • Extended warranty (years): 5
24,90 € * Shipping Weight 0.2 kg
Filter Set 2 Moon & Planets from 100mm (4")
Specification
  • Net Weight total (incl. accessories) (g): 44
  • Material: Aluminium
  • Extended warranty (years): 10
  • Telescope filter type: Color Filter
45,00 € * Shipping Weight 0.2 kg
Specification
  • Total length (mm): 31
  • Total width (mm): 31
  • Total height (mm): 13
  • Net weight (without access.) (g): 15
  • Eyepiece Barrel Diameter (mm): 31.7
  • Colour: black
  • Material: Aluminium
  • Extended warranty (years): 10
  • Telescope filter type: Polarizing Filter
55,00 € * Shipping Weight 0.25 kg

Telescope-Filters

Filters are a popular tool in the field of solar and planetary observation. They increase the contrast for certain details that are poorly or not at all to see without a filter. Basically, there are two problems with the observation: (1) over-exposure, the boundary between two regions of the observed object with different brightness "fraying" or simply blurred because the eye is overwhelmed with the contrast in bright light; and (2) adjacent areas have similar coloring, but only small differences in intensity. Both effects cause that the combination of eye-brain can no longer separate details and thus tries to show both objects as a single one.