Double-Stacked H-Alpha Etalons Patented RichView Tuning Improves Surface and Prominence Contrast 800mm f/8.8 Solar Viewing Refractor 30mm Secondary Rear Blocking Filter 0.7-0.5Å Hydrogen-alpha Wavelength Sol Ranger Solar Finder 1.25" Helical Focuser / Three Eyepieces Clamshell Mounting Ring OTA Only: Mount and Tripod Required Coronado 's versatile SolarMax II 90 90mm f/8.8 H-alpha Double-Stacked Solar Telescope
represents the largest aperture and longest focal length in the
SolarMax II series. It offers the highest magnification potential and
clearest views compared to smaller iterations. This scope is calibrated
for the Hydrogen-alpha wavelength, and comes equipped with Coronado's
RichView tuning system. This system allows direct adjustment of each of
its etalon filters enabling it to be tuned up or down from the 6562.8Å
wavelength for highlighting specific zones of the chromosphere and to
compensate for Doppler shift that can pull prominences and other
features off-band and affect views. Tuning areas of concentration back
on-band allows for higher-contrast views of prominences on the solar
limb.
Its primary internal etalon provides a bandpass of 0.7Å,
which will reveal prominences in high-contrast. Prominences generally
appear larger with this size filter than in narrower bandwidths. This
version of the SolarMax II comes with a secondary etalon that fits on
the front of the OTA and narrows the bandpass to 0.5 Angstroms. At this
bandpass, surface contrast is improved versus wider bandpasses. This
ability to change the bandpass allows users to see more areas of the Sun
than with a single-etalon solar scope. Complementing the primary etalon
filter is a rear internal 30mm blocking filter. This secondary filter
further isolates the H-alpha wavelength to improve contrast and enhance
views. While a smaller 10mm or 15mm blocking filter would suffice,
Coronado includes this larger option to allow the use of eyepieces with
larger field-stop diameters to be used without vignetting occurring, as
might be seen with smaller filters, which would interfere with the field
of view. Setting this rear blocking filter internally enables the use
of the included 90° star diagonal for comfortably viewing the Sun when
it is high in the sky, or without the diagonal for direct-connection of
imaging rigs.
The SolarMax II is offered here without a mount or
tripod, but comes with a wide clamshell mounting ring that is outfitted
with a 1/4"-20 socket for attachment onto many photo/video/field tripods
or on piggyback rigs, or an optional Vixen-style dovetail plate is
available for use with conventional alt-az, EQ, or motorized telescope
mounts.
In the Box Coronado SolarMax II 90 90mm f/8.8 H-alpha Double-Stacked Solar Telescope (30mm Blocking, OTA Only)
T-Max 60 - Doppler Tuning Unit
SolarMax 90 Filter
90mm Secondary H-alpha Etalon
Cemax 25mm Eyepiece
90° 15mm H-Alpha Blocking Filter (1.25")
CEMAX 18mm H-Alpha Solar Eyepiece (1.25")
30mm Internal Blocking Filter
90° Star Diagonal
Sol Ranger Solar Viewfinder
Clamshell Mounting Rings
Travel Case
Limited One-Year Warranty
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