Thinking beyond the Schmidt-Cassegrain.
Like NASA’s Hubble Space Telescope, almost every professional observatory reflector in the world today
uses a Coma-Free optical system. So it’s no surprise that Meade engineers chose their Advanced Coma-Free
design as the ideal optical configuration. This design improves on the traditional Ritchey-Chrétien design
by adding a corrector lens to reduce astigmatism and diffraction spikes. Then Meade engineers designed the
20” MAX-ACF’s mechanical and electronic systems from a clean slate (and thousands of amateur astronomer
suggestions) to ensure it would become the most capable telescope in company history.
For serious research or fast, flatter, wide-field fun.
Recognizing the growing popularity of astrophotography, Meade chose a fast (f/8) focal ratio for the 20”
MAX-ACF. This offers astrophotographers optimal speed in combination with a large, coma-free field of view
(from edge-to-edge). Despite all of its visual and technical prowess, a 20” MAX-ACF is just plain fun. Sky
& Telescope says, “One aspect of the 20” MAX-ACF that repeatedly amazed me [was] ease of use. Working
with the 20” MAX-ACF was a very pleasant out-of-the box experience. In a perfect world all products would
be like this…”
Observatory-precise pointing and tracking.
The 20” MAX-ACF’s mechanical systems are complex. But what really matters is results. Sky & Telescope described a
first experience autoguiding the 20” MAX-ACF with a large format CCD camera. After a few initial set-up procedures…
“the numbers looked good, so I tried a 5-minute autoguiding exposure. The image was perfect… I went on to
make 15 more 5-minute exposures that night, and every one was a keeper!”
We thought of every thing. Then made it electronic .
From electronic focusing and collimation, to electronic drive-training and sensor calibration, from electronic
temperature controls to electronic High-Precision Pointing (HPP), the 20” MAX-ACF can help you do
anything from imaging Saturn to imaging an 18th magnitude galaxy too dim to visually confirm before you
take the shot.
Adding on to your 20” MA X-ACF.
Your 20” MAX-ACF is absolutely the telescope of a lifetime. Meade features a complete line of additional
accessories that will help your scope grow with you for years to come.
A success story fresh off the drawing board.
On March 26, 2002, Meade engineers set out to design a telescope with the
most sophisticated optics, mechanics and electronics ever manufactured.
If successful, the new scope would make observatory-level performance
accessible to any serious astronomer or astrophotographer who desired it.
The 2006 20 MAX-ACF review in Sky & Telescope maga zine said, “Meade
cla imed that one of its goa ls in developi ng the 20 MA X-ACF was to
address va r ious problems… that had dogged Schmidt-Cassegr a i ns
for more t h a n 30 y ears. My feeling is that t h e com pany r eally has
succeeded. Even when you judge i t by the dem anding criteria imposed
by long-exposu r e im aging, the 20 MAX-ACF is a win n er.
(6 Seiten)
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