Used Coronado SolarMax II 60 with BF15 - SOLD
- This is a used solar telescope in excellent condition
- Allows viewing of solar prominences and the chromosphere
Used Coronado SolarMax II 60 with BF15 - SOLDCoronado 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 BF15 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 angstrom passband, centered on the 6562.8 angstrom H-Alpha line and the sub-angstrom passband width gives a perfect balance of prominence and surface features. The assembly is thermally stable at 0.005 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 SMT 60 optical tube
- BF15 blocking filter diagonal
- 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.
QUESTIONS & ANSWERSAsk a Question
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??
Yes, this scope will reach focus with a DSLR through the diagonal either with or without the powermate - though you will need the Powermate 2.5x T-ring adapter. The scope has 2x sliding drawtubes and a helical focuser that allow adjustment of around 4 in
What is the difference between coronado solar max 40mm and 60mm? And what is better? Is there a big difference?
The difference is quite substantial. On a big solar day, it is as noticeable as the difference between a 4" and 6" scope on deep sky objects. The structure in the prominences and detail on the surface will show up much more clearly with the larger Solar
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.
To get a full solar disk image at all, you need a BF number larger than the focal length of the scope (or BF number x100 for Coronado), but you want to go a bit larger than this for photography. For example: an 400mm focal length Coronado 60 scope needs a
Do you make a camera compatible with windows?
This bundle includes a USB uploader adapter that is Windows compatible and will let you see the images on your computer.
What does the BF #"s mean? What's the difference between the BF #'s 5,10,15,30 etc... besides the price?
BF stands for Blocking Filter, and the number afterward is the filter diameter in mm. The longest focal length usable with each blocking filter is also linked to the number (BF5 = 500mm max, BF10 = 1000mm max).
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?
When starting out, use your solar finder and lowest power eyepiece to locate the sun. Turn the helical focuser until it is about halfway through its travel and then slide the extension section of the focuser outward by loosening the nylon screw and pullin