Skip to content

Astrophotography Deal - Celestron 11" RASA - $1000 Off - Now Only $2595 - Limited Quantity On Hand

Coronado SolarMax 90 II Double Stack Solar Telescope with 15 mm Blocking Filter and RichView Tuning - SMT90DS-15

shipping truck Free shipping
$5,399.00 $3,999.00
Price match Guarantee

Coronado has discontinued the SolarMax 90II and we are out of the Double Stack model with the 15mm blocking filter. Here is a link to all of the Coronado SolarMax II Solar Telescopes that are available at High Point. If we can be of further assistance, please don't hesitate to call us at 1-800-266-9590 or send an email, and we will be happy to help you. Thank you!

Coronado SolarMax 90 II Double Stack Solar Telescope
with 15 mm Blocking Filter and RichView Tuning

The Coronado SolarMax II 90 Solar Filter Telescope is the largest aperture scope in the Coronado fleet. This research grade solar scope is a beautiful instrument that sports polished brass and black finishes as well as precisely crafted tuning knobs. When you purchase a Double-Stacked Coronado SolarMax II 90 Solar Filter Telescope your package includes:

  • "Double Stacked" Coronado SolarMax 90 Solar Telescope with two Filter Etalons for increased contrast and resolution
  • Coronado 15 mm Blocking Filter
  • Coronado Mounting Rings
  • Coronado Cmax Eyepiece Set - 12 mm, 18 mm, 25 mm
  • Coronado Sol Ranger Solar Finder
  • Coronado Hard Carrying Case
  • Life Time Tech Support from High Point Scientific

The "double stacked" Coronado SolarMax 90 II is a serious instrument built for someone looking to see the finest areas of detail on our sun. Prominences, flares, filaments and ever changing surface areas of the sun will all be brought to you in high def with the SolarMax.

So why is a "Double Stacked" solar telescope better then a traditional solar telescope? The simple answer is that you get significantly enhanced optical resolution with the "double stacked" version.

Coronado has enhanced the "double stacked" SolarMax 90 by placing an additional filter etalon at the front of the scope. Now there are two etalons present, one internally with the new RichView tuning system and one at the front of the scope with the T-Max tuning system.

"Double Stacking" the etalons improves the scopes resolution by reducing the already narrow <0.7 angstrom bandpass to an even narrower <0.5 angstrom bandpass. With this set up, the enhanced resolution and contrast will offer a view of the sun that is absolutely stunning.

The "double stacked" system works the same as a non "double stacked" system, the only difference is that now it's a three part system. The telescope body incorporates a tunable sub-aperture etalon in its body as well as a removable etalon on the front of the scope. These tunable etalons works in conjunction with a 15 mm blocking filter situated in the solar telescopes 1.25" star diagonal. Together these elements produce a <0.5 Angstrom passband which yields an optimal balance of prominence and surface detail.

Blocking Filter - The Blocking Filter is one of the features on the Coronado SolarMax Series of Solar Filter Telescopes that influences cost. The Coronado SolarMax II 90 can be sold with a 15 mm or a 30 mm Blocking Filter. This model comes with a 15mm Blocking Filter. If you need a wider and more illuminated field for bigger 35 mm style imaging chips, then you might want to upgrade to the SMT90DS-30 instead.

RichView Tuning - The newly re-designed Coronado SolarMax II 90mm Solar Filter Telescope with RichView system is a great step forward in solar telescope development. The Rich View Tuning Method allows you to zero in on the most precise wavelength of light for each area of the sun on either side of the hydrogen-alpha (Ha) band by tuning the primary filter etalon with an adjustment lever on the side of the scope's body. This functionality assists in tuning in the highest contrast views of active regions, flares, filaments and other surface areas of the sun. The new RichView system will also allow for spectacular views of the prominences on the solar limb.

Focusing - The Coronado SolarMax II 90 Solar Filter Telescope has a precisely machined helical focuser at the back of the scope. The focuser has a rubber grip ring to assist in detailed focus movements.

Cemax Eyepieces - The SolarMax 90 comes with a set of Coronado Cemax Eyepieces. The Cemax Eyepiece set delivers magnifications of 32x, 44x, and 67x. The Coronado Cemax Eyepieces were built specifically for solar observation.

Other Accessories - In addition to the Coronado Cemax Eyepiece Set the Coronado SolarMax 90 II also comes with a Hard Carrying case for easy and safe transportation. For the easy alignment of the solar scope on the sun Coronado provides a Sol Searcher view finder. And for easy mounting to a multitude of mounts Coronado provides a brass mounting ring.

Coronado has been pioneering solar observation for years which is why they are always the first to develop industry leading technology and functionality. The SolarMax Solar Telescopes have been used around the world by serious solar enthusiasts and professional research facilities for observation of surface detail and prominences on the Sun in hydrogen-alpha (Ha) light. Powerful but very portable, this high resolution Solar Telescope offers dedicated visual observation of the Sun as well as high quality imaging. We are heading toward solar maximum and the views of the sun are going to get better and better. The Coronado SolarMax 90 II will help you witness this uniquely amazing event!

Coronado SolarMax 90 II Specifications:

  • Aperture: 90 mm
  • Focal Length: 800 mm
  • F/Ratio: f/8.8
  • Bandwidth (Angstrom): <0.5
  • Weight: 23 lb