Explore Scientific Blue filter #80A 2″
If you are serious about planetary observation, you know how important it is to choose the right filter. The Explore Scientific Blue #80A in the 2″ size is a classic blue filter that astronomers have been using for decades - and for good reason. It transmits blue and blue-green wavelengths while suppressing red and yellow components of the spectrum, significantly increasing the contrast of surface details on planets.
Optical design and build quality
The filter belongs to the L-RGB filter category. Its optical element features a multi-layer anti-reflection coating (multi-coating) that minimises unwanted reflections and ensures high transmission in the selected part of the spectrum. The threaded ring is precision-machined from aluminium - a material that is corrosion-resistant and lightweight, with the total filter weight being just 11 g. The filter screws directly into the barrel of a standard 2″ eyepiece without the need for any tools.
What can you observe with the #80A filter?
The #80A is a proven tool for observing a wide range of planets:
- Jupiter - helps distinguish structures in cloud bands and enhances the Great Red Spot
- Saturn - improves contrast between the rings and the planetary disk
- Mars - enhances surface albedo features and polar caps
- Venus - otherwise an almost featureless object, but when using a blue filter, subtle cloud formations in the ultraviolet part of the spectrum may become visible - the transmission band of the #80A approaches this range
The #80A is a truly universal tool for planetary visual astronomy.
About the Explore Scientific brand
Explore Scientific is a brand with a long tradition in astronomical optics, placing emphasis on manufacturing precision and the availability of quality accessories for observers of all levels. The #80A filter series meets the standards relied upon by both beginners and experienced planetary observers alike.
Why choose the Explore Scientific Blue #80A?
- Multi-layer optical coatings for maximum transmission efficiency
- Precision-machined aluminium thread for smooth, reliable operation
- Compliant with the industry-standard 2″ format - compatible with the vast majority of eyepieces and diagonals on the market
- Total weight of only 11 g - no impact on balance at the focuser
If you are looking for a reliable blue filter that will serve you faithfully on every night under the stars, the Explore Scientific Blue #80A is a choice you will not regret.
