Coronado SolarMax II 40mm Double Stacking Etalon Filter

MSRP: $799.99 Please see your local authorized reseller for pricing and availability.

View All Specifications

  • Give your PST a major contrast boost with this thread on filter
  • Designed to attach to an existing etalon, creating a double-stack system with a narrower bandpass
  • Includes RichView tuning to optimize contrast on the solar feature being observed
  • Threads directly onto the front cell of a PST, narrowing the bandpass to <0.5 Angstroms (Å)!
  • Not to be used standalone, MUST be combined with an existing PST or SolarMax 40 and blocking filter (BF)
Item #: SME-40

Where To Buy?

  • Woodland Hills Camera & Telescopes
  • Orion Telescopes & Binoculars
  • High Point Scientific
  • Mile High Astronomy
  • Agena Astro
  • Khan Scope
  • First Light Optics

This add on etalon filter reduces the normal bandwidth of a PST, SolarMax 40 telescope, or filter set (etalon and Blocking Filter combination) from the single stack 0.7-1 Angstrom (Å) performance to a more restrictive 0.5 Å, increasing visibility of surface detail and active regions on the Solar disc. Note that this etalon cannot be used on its own — it MUST be combined with a primary SolarMax 40 filter and blocking filter, complete Coronado SolarMax 40 telescope, or a PST telescope.

Solar Disk Detail Image

The Sun in hydrogen-alpha light showing some of the different features visible around the solar disk.

Includes the patented RichView tuning assembly, which allows direct tuning of the primary filter etalon. This provides an optimized contrast boost for the best possible views of active regions, filaments and surface detail, or quickly and easily re-tune for prominences on the solar limb. Upgrade your PST or SolarMax 40 to a double stack configuration for an even more amazing view of our closest star!

Limited Warranty against defects in materials or workmanship for five years from date of purchase. This warranty is provided by Meade for the benefit of the original retail purchaser only. For complete warranty details contact Meade at 800-626-3233.

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

User level
Safe solar viewing requirements
Must be used with a blocking filter
T-max tuner
Five year