16 | Chapter 5: OPTIONAL ACCESSORIES |
CHAPTER A wide assortment of professional Meade accessories is available for both ETX model telescopes. Meade accessories
5 greatly extend many important applications of the telescope, from
Meade telescopes and accessories, including optional accessories for ETX telescopes, are available at more than 2000 dealer locations in the U.S. and Canada and through Meade international distributors worldwide. Once you have identified the accessories you wish to order, contact your local Meade authorized dealer.To find a dealer near you, call
(949)
#497 Autostar™ Computer Controller: One of the most important advances in telescope control in the past 25 years, the Meade #497 Autostar Computer Controller (Fig. 23) turns either ETX model into an automatic celestial object locating system. Just plug Autostar into the telescope’s HBX port in place of the standard-
equipment Electronic Cont- roller, do a quick telescope alignment, and you are ready to observe any object in the
Autostar’s
Connector Set, included with each astro software package), the observer can point and
click on any object shown on the PC display. The telescope then slews to the object at a speed of 5° per second on both telescope axes and places the object in the telescopic field of view.
Eyepieces: Meade Super
Plössl (SP), Super Wide Angle
(SWA), and Ultra Wide Angle (UWA) eyepieces in the standard
barrel diameter (Fig. 25) permit Fig. 25: Optional Eyepieces
awide range of magnifying yield higher and lower powers with both ETX models. magnifying powers with the Powers obtained with each telescope.
eyepiece are shown in the following table.
| ||||
Eyepiece | Power | 2X Barlow | Power | 2X Barlow |
|
|
|
|
|
SP6.4mm | 195X | 390X | 297X | 594X ** |
SP9.7mm | 129X | 258X | 196X | 392X |
SP 12.4mm | 101X | 202X | 153X | 306X |
SP 15mm | 83X | 166X | 127X | 253X |
Best of all, the Meade Autostar is easy to use. Even the most novice observer will locate dozens of fascinating objects the very first night out
—from commonly observed objects, like the rings of Saturn, the satellites of Jupiter, and the Orion Nebula (M42), to more difficult objects, such as the Ring Nebula (M57) in Lyra, the Spiral Galaxy (M33) in Triangulum, and the Som- brero Galaxy (M104) in Virgo; to very obscure objects near the telescope’s threshold of visibility, such as spiral galaxy NGC 3310 in Ursa Major.
Fig.23: #497 Autostar Computer Controller.
SP 20mm | 63X | 126X |
| 95X | 190X |
|
SP 26mm * | 48X | 96X |
| 73X | 146X |
|
SP 32mm | 39X | 78X |
| 59X | 119X |
|
SP 40mm | 31X | 62X |
| 48X | 96X |
|
SWA 13.8mm | 91X | 182X |
| 138X | 275X |
|
SWA 18mm | 69X | 138X |
| 106X | 211X |
|
SWA 24.5mm | 51X | 102X |
| 78X | 155X |
|
UWA 4.7mm | 266X | N/A |
| 404X | N/A |
|
UWA 6.7mm | 187X | 374X | ** | 284X | 567X | ** |
*Included as
**Use these eyepieces only under extremely steady atmospheric conditions.
Meade SP and SWA eyepieces are ideal for
Any of Autostar’s database
objects can be called up and entered on the hand controller display in seconds. The observer then simply presses the GO TO pushbutton and watches as the telescope automatically slews to the object and places it in the field of view. Autostar brings into easy access objects that were previously unreachable for all but the most dedicated of amateur astronomers.
Astro Software/Cable Connector Kit:
Meade
might select the SP 9.7mm, SP 12.4mm, and SWA 18mm. Meade SWA eyepieces yield extremely wide fields of view, perfect for the examination of star fields or diffuse nebulae, or for terrestrial applications. Under steady viewing conditions, Meade UWA 4.7mm and
6.7mm eyepieces present the widest fields of view obtainable at high powers and are excellent eyepieces for viewing the Moon and planets.
computer. With the Meade Fig.24: Astro software. astro software loaded into
the PC, and with the PC connected to the telescope through Autostar’s
#126 2x Barlow Lens: An amplifying lens, the #126 2x Barlow Lens (Fig. 26) doubles the powers of all eyepieces with which it is used. Insert the #126 into the telescope’s eyepiece holder first, followed by an eyepiece. Example: By itself the SP 26mm eyepiece yields a power of 73X with the
Fig. 26: Use the #126 2x Barlow Lens to double the magnification of the eyepiece employed.