Coronado SolarMax II 60 <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 II 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 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 BF15 and is available with an internal module to lower that to <0.5 Angstroms. The 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 SolarMax 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 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 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 60 BF15, 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 15mm clear aperture blocking filter incorporated into the diagonal. The solar filter has a <0.7Ångstrom 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 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 BF15 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 Instruments Product Number: SMT60-15