Coronado SolarMax II 90 - 90mm f/8.8 <0.7A H-Alpha Telescope with BF15

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Coronado SolarMax II 90 - 90mm f/8.8 <0.7A H-Alpha Telescope with BF15
$3,599.00
Item # CI-SMT90-15
OR
  • The Coronado SolarMax II 90 H-Alpha Telescope package includes Cemax eyepiece set, hard travel case, Sol Ranger solar finderscope, clamshell mounting rings and five year warranty.
  • Aluminum 800mm focal length 90mm aperture f/8.8 refractor is custom-built to optimize the performance of the Coronado Instruments SolarMax II 90 Hydrogen-Alpha solar filter and BF15.
  • The Coronado SolarMax II 90 H-Alpha Telescope is the largest dedicated solar telescope ever to be mass-produced and is in use around the world from private observatories to professional research facilities.
Description

Details

Coronado SolarMax II 90 <0.7A BF15

Coronado has developed a series of telescopes as a result of the often asked question, "What is the best telescope to use with a Coronado filter?" While almost all refractors and most reflecting telescopes can be used with a Coronado filter, no other telescope has been designed with all its optical aberrations and coatings optimised at H-Alpha. Most nighttime telescopes, when used at H-alpha, will not have the image contrast exhibited by a SolarMax nor the image quality. Most broadband coatings, used on such telescopes, will have reduced effectiveness at this wavelength and telescopesYear Coronado Warranty. (particularly reflectors) not specifically designed for Solar viewing, will exhibit unnecessary scattering and spurious light transmission. All of the Coronado scopes, even the PST, have been designed with this one wavelength of light in mind and will increase contrast and give you a darker background for viewing and imaging.

"Why buy a telescope that can only look at one object?" The Sun in H-A is the most dynamic object you will ever see while pointing a telescope skywards. Constantly changing and never repeating itself the Sun through a Coronado filter will hold your attention for a lifetime. Coronado telescopes serve to enhance that view for you, your family, and friends. The telescopes provide an easy and portable set up that is always ready right out of the box. For those looking for more aperture we proudly present the SolarMax II 60 dedicated H-alpha telescope. Built to our exacting standards the SolarMax II 90's provides the user a telescope with the same lightweight portability of our SolarMax II 60 but the extra aperture greatly increases the resolution of detail on the surface and on the limb. With over twice the surface area of the SolarMax 60 the difference is obvious.

The SolarMax II 90 is the largest H-A telescope ever to be mass-produced and is in use around the world from private observatories to professional research facilities. Noted for incredibly sharp, 'contrasty' H-Alpha views, and stunning detail. Even when viewing with a single eyepiece the sun appears fully animated even revealing hints of curvature, this effect is enhanced when used with bino-viewers. The SolarMax 90 is compatible with most imaging systems and amateur astronomers have produced images that rival those gathered by multi million dollar systems.

This Coronado SolarMax II 90 is a handsome aluminum and black f/8.8 refractor with 800mm focal length and 90mm aperture. Its purpose is simple. The Coronado SolarMax 90 <0.7A was custom-built to optimize the performance of the SolarMax 90 Hydrogen-Alpha solar filter. The SolarMax 90 was intended to do much than just reveal sunspots... it was meant for studying prominences, flares, granulation and more. The achromatic doublet lens designed by Dick Buchroeder utilizes special multi-layer antireflection coatings on all air-glass surfaces to optimize anti-ghosting. This is an important feature when observing such a bright target as the Sun. Safety issues include hard vacuum-deposited. non-degenerating coatings. This means not only are you assured your vision is protected but your investment as well. The Coronado SolarMax 90 BF15, when properly cared for, will last a lifetime.

At the heart of the SolarMax 90 <0.7A , a two-piece solar filter is formed from a full-aperture 90mm etalon positioned in front of the objective lens and a 15mm clear aperture blocking filter incorporated into the diagonal. The solar filter has a <0.7 Ångstrom passband, centered on the 6562.8 Ångstrom H-Alpha line and the sub-Ångstrom passband width gives a perfect balance of prominence and surface features. The assembly is thermally stable at 0.005Å per degree Centigrade, so there is no drifting off the H-Alpha line as the filter heats up during normal observing. The 15mm clear aperture blocking filter is perfectly matched to the focal length of the telescope to give full disk views of the Sun.

On the outside, the Coronado Solar Max II 90 <0.7A consists of a manual 1.25" drawtube which extends for coarse focusing. A secondary helical focusing ring around the drawtube is then used to provide the appropriate final fine focusing. Both visual observing and afocal imaging, as well as barlow lenses are able to come to focus using this method and digital photography and binoviewers also experience no problems with focus. Between the the solar filter etalon and the objective lens you'll find the RichView tuner which mechanically tilts the filter's bandpass of the h-alpha line. This allows observance of Doppler-shifted solar activity, such as moving flares!

Coronado SolarMax II 90 <0.7A BF15 Features...

  • Cemax Eyepiece Set and Cemax Barlow Included!
  • Threaded, Protective Metal Cover For Primary Lens.
  • SolRanger Sun Finder.
  • Deluxe Hard Carrying Case.
  • Clamshell Mounting Rings w/1/4"-20 Thread Tripod Adapter.
  • Special multi-layer anti reflection coatings on all air-glass surfaces to optimize anti-ghosting.
Coronado Instruments Product Number: SMT90-15
Additional Information

Additional Information

SKU CI-SMT90-15
UPC Code 709942996302
Solar Instrument Type Telescope
Aperture 81mm - 99mm
Emission Line H-Alpha
Manufacturer Coronado
Warranty 1 Year Warranty
Blocking or ERF Aperture 15mm
Bandwidth <0.7 A
Telescope Focal Length 800mm
Telescope Focal Ratio f/8.8
Solar Finder Included? Yes
Tuner Included? Yes
Length of Optical Tube Not provided by manufacturer
Optical Tube Weight Not provided by manufacturer
Reviews

Customer Reviews 1 item(s)

Wonderful detail in prominences
I got this scope for $2500 and consider it a steal. Could not believe the detail and contrast the first time I used it. The sun just happened to have several very large flares and numerous small ones plus some small sun spots. Could not be more pleased.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by KM26 / (Posted on 10/6/2014)
Included Items

Included Items

  • Coronado SolarMax II 90 <0.7A H-alpha Telescope
  • RichView Etalon Tuning System
  • BF15 Blocking Filter
  • Sol Searcher Solar Finderscope
  • Clamshell Mounting Rings
  • Hard Travel Case
  • Full CEMAX Eyepiece Set
Questions & Answers

Product Questions

Hello,

I am interested in this item (CORONADO SOLARMAX II 90 H-ALPHA TELESCOPE)
Could you tell me what are the measurements of the carrying case please ?
Thank you very much.
Best regards,

G. BASLE
0
What tripod is recommended for this telescope?
-9
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