SolarMax 60mm H-alpha filter with T-Max and 10mm blocking filter | under 1000mm focal length

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This 60mm aperture H-alpha filter can be used with virtually any refractor telescope having a 60mm or greater aperture – but is designed to work best with telescopes having a focal length of 1000mm and under. The front filter element (containing the ERF and etalon) is threaded to mount directly into the front cell of the TeleVue Pronto refractor, and works particularly well with this scope, but will require an optional custom mounting plate for installation on other telescopes. This filter’s 60mm aperture and <0.7A bandwidth provide very high resolution and contrast and result in excellent views of fine surface details and prominences when mounted on a good quality short focal length refractor telescope. This filter package is provided with a 10mm clear aperture blocking filter with a mounted in a 1.25" right angle star diagonal. With such a combination on a scope longer in focal length than 1000mm, you might not be able to achieve a full disc solar image and would be limited to visual and photographic explorations of only portions of the Sun’s surface at a time. The SM60/15 combination, with a 15mm clear aperture blocking filter in a 1.25” diagonal, would be a better choice with scopes up to 1500mm if full disk views are desired. The SM60/30 combination, with a 2” straight-through 30mm clear aperture blocking filter, would be a better choice with very long focal length scopes if full disk views are desired.

Some events on the Sun – notably active flares and coronal mass ejections (CMEs) – are extremely fast moving. If such features occur on the disc of the Sun, rather than on the limb, their high velocity towards the observer results in their wavelength being Doppler-shifted to a shorter wavelength than the H-alpha line. If the velocity is high enough, this Doppler-shifted wavelength could be outside the passband of the filter and the feature would not be observable. The filter includes a T-Max mechanical tuning mechanism that allows the user to de-tune the SolarMax slightly from the H-alpha line to make such Doppler-shifted phenomena more visible. The T-Max fits between the SolarMax and its adapter plate at the front of the scope, but is not shown in the image. A simple rotary wheel movement accomplishes the tilt necessary to move the passband of the filter. Because of the filter's position at the front end of the telescope, this does not compromise the performance of the filter nor limit the H-alpha field of view as is the case with rear mounted filters.

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Coronado Instruments - SolarMax 60mm H-alpha filter with T-Max and 10mm blocking filter | under 1000mm focal length

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Coronado Instruments - SolarMax 60mm H-alpha filter with T-Max and 10mm blocking filter | under 1000mm focal length
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Our Product #: SM6010
Manufacturer Product #: SMF60-10
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This 60mm aperture H-alpha filter can be used with virtually any refractor telescope having a 60mm or greater aperture – but is designed to work best with telescopes having a focal length of 1000mm and under . . .





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