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Table of Contents
Related Manuals for Apertura Classical Cassegrain APT-8CSGN
Summary of Contents for Apertura Classical Cassegrain APT-8CSGN
- Page 1 8” Classical Cassegrain Telescope User’s Manual By Matthew M Paul 2024...
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Page 2: What's Included
What’s Included Focuser 2” Spacer Ring 2x 1” Spacer Ring Thread Protector M56 to M54 M56 to M48 M56 to M42 V series Dovetail Bar 10. 2x Color Matched Radius Blocks 11. Radius Block Screws 12. Dovetail Bar Screws 13. 2” to 1.25” adapter 14. - Page 3 Application for the Telescope The Apertura Classical Cassegrain is well suited to visual use of almost every type. It offers a 1 ¼° maximum field of view with the 8” model, 1 ½...
- Page 4 This is not the case with the Apertura Classical Cassegrain Telescope. The larger secondary mirror allows for full illumination and use of the complete...
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Page 5: Mounting Hardware
Mounting Hardware The Apertura 8” Classical Cassegrain comes with a D-style dovetail plate mounted to the telescope. It also comes with a V-series dovetail bar in the package which can be mounted to the top of the telescope for attaching accessories or a second, smaller telescope. The D-series bar can also be replaced with the V-series bar for mounting the telescope on mounts which do not accept D-series dovetail bars. - Page 6 Focuser The 8” Classical Cassegrain uses a unique dual speed linear bearing focuser which is strong and can support a 2” diagonal and large 2” eyepieces. What exactly is a linear bearing focuser? This focuser design is similar to a Crayford but uses a 100mm long rail which is supported by dozens of precision ball bearings that ride in a track.
- Page 7 1.25” diagonal. 2” Diagonal When using the Apertura 2" Twist Lock Carbon Dielectric Mirror Diagonal [APT-D2CF] with a 2” eyepiece like the Apertura 26mm Super Wide Angle 2" Eyepiece [APT-SWA26] in the 8”...
- Page 8 Classical Cassegrain, focus can be found around the 30mm mark. The single 1” long spacer will need to be installed between the focuser and the telescope if you will be observing with the 2” diagonal. There are advanced system charts at the end of this document which demonstrate a variety of the nearly limitless combinations of accessories that can be used with this telescope and how you might connect them together.
- Page 9 Then, take note of the reflective circle from the Apertura CCE. By covering and uncovering the reflective portion of the CCE with your hand it will be apparent which part of the reflection is from the CCE. Adjust the secondary mirror collimation hardware until the reflective target is centered on the crosshairs and the secondary mirror center spot.
- Page 10 star becomes the most concentric. This positioning within the field of view, where the star looks the most even, is very close to the actual optical axis of the mirrors. We want to move the optical axis so it corresponds with the center of the field of view. This is, in essence, exactly what we are doing when we collimate a telescope.
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Page 13: Warranty
Warranty The Apertura Absolute Warranty provides two years of coverage against product defects. After the initial two-year warranty expires, this product qualifies for Apertura's Three-Year Accident Replacement Program. In addition, the Apertura Absolute Warranty is transferable! It is important to keep your original receipt and the product's original boxes and packaging, should...
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