Coronado SolarMax II 60 H-Alpha Solar Telescope - <0.7A with BF5

Coronado SolarMax II 60 H-Alpha Solar Telescope - <0.7A with BF5
Item # CI-SMT60-5
  • Redesigned Coronado SolarMax II 60 H-Alpha Solar Telescopes include a precision RichView tuning system and 5mm blocking filter.
  • Aluminum 400mm focal length and 60mm aperture f/6.6 refractor is custom-built to optimize visual observation of the Sun as well as high quality imaging.
  • The Coronado SolarMax II 60 H-Alpha Solar Telescope package includes Cemax eyepiece, hard travel case, Sol Ranger, clamshell mounting rings and five year warranty.


Coronado Instruments SolarMax II 60 H-Alpha Telescope

Coronado Instruments 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 night-based astronomical telescopes, when used at H-alpha, will not have the image contrast exhibited by a SolarMax II - nor the image quality. Most broadband coatings, used on such telescopes, will have reduced effectiveness at this wavelength and telescopes (particularly reflectors) not specifically designed for studying the Sun, will exhibit unnecessary scattering and spurious light transmission. All of the Coronado telelscopes, even the PST, have been designed with this one wavelength of light in mind and will increase contrast... giving you a darker background for viewing and imaging.

"Why buy a telescope that can only look at one object?" The Sun in H-Alpha 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 Instruments dedicated solar 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 exacting standards the Coronado Solar Max II 60's provides the user a telescope with the same lightweight portability of our SolarMax II 40 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 II 40, the difference is obvious.

The SolarMax II 60 comes standard at <0.7 Angstroms with a BF5 blocking filter and is available with an internal module to lower that to <0.5 Angstroms. The innovative RichView tuning system attached directly behind the etalon gives you the ability to adjust for Doppler shifted light. Bino-viewers and most imaging equipment will come to focus, sometimes with the use of a Barlow or OCS. The advantage of the extra aperture becomes clear each time you view.

This Coronado Solar Max 60 is a handsome brass and black f/6.6 refractor with 400mm focal length and 60mm aperture. Its purpose is simple. The Coronado SolarMax 60 <0.7A was custom-built to optimize the performance of the SolarMax 60 Hydrogen-Alpha solar filter. The SolarMax II 60 was intended to do much than just reveal sunspots... it was meant for studying prominences, flares, granulation and more. The achromatic doublet lens utilizes special multi-layer anti-reflection 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 60 BF5, when properly cared for, will last a lifetime.

At the heart of the SolarMax 60 <0.7A, a two-piece solar filter is formed from a full-aperture 60mm etalon positioned in front of the objective lens and a 5mm 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 5mm 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 60 <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 60 <0.7A BF5 Features...

  • Coronado 25mm CEMAX Eyepiece.
  • Threaded, Protective Metal Cover For Primary Lens.
  • 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 Product Number: SMT60-5
Additional Information

Additional Information

UPC Code 709942996203
Solar Instrument Type Telescope
Aperture 51mm - 70mm
Emission Line H-Alpha
Manufacturer Coronado
Warranty 1 Year Warranty
Blocking or ERF Aperture 5mm
Bandwidth <0.7 A
Telescope Focal Length 400mm
Telescope Focal Ratio f/6.6
Solar Finder Included? Yes
Tuner Included? Yes
Length of Optical Tube 16.75"
Optical Tube Weight 6 lbs.

Customer Reviews 2 item(s)

Good but..
Visually, I find the Solarmax II to exceed my expectations - it really does deliver excellent views of the surface granulation and of limb prominences. So full marks here.

On the other hand, the 25 mm Cemax eyepiece that is included with the scope is mediocre. The exit pupil is extremely narrow with insufficient eye relief. This part is a fail but a Nagler 16T5 does work extremely well.

My second gripe is that the scope does not have sufficient backfocus to permit attachment of a camera. Having tried a Canon DSLR and a Philips 900NC webcam, I think there's an intrinsic design problem that may force the use of a Barlow.

All in all, I really do like the scope.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by NoiseJammer / (Posted on 8/25/2012)
SolarMax II
Have owned a Coronado PST and found it a fine solar scope...But decided to advance to the next major level and I purchased a Coronado 60mm Solarmax ll BF 15..Right of the mark the fit, finish,and robust quality is so superior to the PST... {but you pay for that quality}
I mounted the unit on a Vixen Porta II and found it sturdy and vary protable for my use...
First light was last week...It did not let me down.. expectation met...INCREDIBLE...the sharpnes, contrast,resolution of prominences,flares,filaments,sunspots, etc. etc. was breathtaking...I spent hours at the eyepiece taking notes and drawing the fine detail gleaned from this incredible scope...
In short,worth every dollar..Looking forward to the next months of solar observing, and especially the Venus transit in June...
1= Houston, We Have a Problem & 5= It's Out of This World
Review by l.B. / (Posted on 2/21/2012)
Included Items

Included Items

  • Coronado SolarMax II 60 <0.7A H-alpha Telescope
  • 5mm Blocking Filter
  • RichView Etalon Tuning System
  • Coronado 25mm CEMAX Eyepiece
  • Sol Ranger
  • Clamshell Mounting Rings
  • Hard Travel Case
Questions & Answers

Product Questions

What is the best focusing procedure and is it easy or difficult? What eyepiece gives the best view for high school kids? First time users?
What size blocking filter is needed on Coronado and Lunt 60 mm solar scopes to take images with these scopes using a DSLR with an APS "C"-sized sensor? Same question using a DSLR w/ a full-sized sensor? Thanks.
Will this scope allow enough prime focus or travel using a DSLR camera fitted with the proper T-ring and adaptor with a Tele-vue powermate 2.5X inserted into the diagonal or even directly into the scope minus the diagonal for solar imaging??
What does the BF #"s mean? What's the difference between the BF #'s 5,10,15,30 etc... besides the price?
What is the difference between coronado solar max 40mm and 60mm? And what is better? Is there a big difference?
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