About the Sky-Watcher High Precision EQ8 Equatorial Mount w/ SynScan, GPS & Portable Pier...
The Sky-Watcher EQ8 High Precision EQ Mount is pier stand - based. It comes with SynScan hand hand controller, 2x10kg counterweights and GPS, with a payload of 50kg. The patented Freedom Find (dual-encoder) technolgy allows the telescope to be moved manually whenever the user wishes - but with no need for re-alignment!
The Sky-Watcher EQ8 High Precision EQ Mount is equipped with auxiliary encoders on both the R.A. axis and Dec. axis. Therefore, the mount can keep tracking its current position even when a user unlocks the clutches and rotates the mount in R.A. axis and Dec. axis manually. With this feature, a user can manually operate the mount anytime without worrying about losing the mount''s alignment status. When the user wants to operate the mount with the SynScan hand control again, no alignment is required and all that is needed to be done is to re-lock the clutches. This feature can be enabled or disabled on the SynScan hand controller.
The Sky-Watcher EQ8 High Precision EQ Mount is equipped with an index on its R.A. worm thus the motor controller can keep tracking the current position of the worm. After a proper PEC training routine, in which the training data is stored in the motor controller permanently, a user can start the periodic error correction (PEC) at any time to improve the tracking performance for short focal length astrophotography. A training process is not required in the next observing session (assuming that the polar alignment is always accurate), thus this is a Permanent Period Error Correction (PPEC). A user can train the mount with manual guiding or auto-guiding. For detailed instructions,
The Sky-Watcher EQ8 High Precision EQ Mount is equipped with a SNAP port which can control the shutter release of a camera. Working with the SynScan hand control''s Camera Control function, a user can take batch exposures when doing astrophotography. Up to 8 groups of "Exposure-time & Frames" combinations can be set on the SynScan hand controller. For detailed information, refer to the SynScan hand control''s instruction manual.
The Sky-Watcher EQ8 High Precision EQ Mount is equipped with two home position sensors. Working with the SynScan hand controller, the mount can be placed to the same home position after turning on the power. For detailed information, refer to the SynScan hand control''s instruction manual.
Sky-Watcher High Precision EQ8 Equatorial Mount w/ SynScan, GPS & Portable Pier Features...
- Freedom Find Function
- Permanent Periodic Error Correction
- Batch Exposures Function
- Auto-Home Function
- Included Pier Stand, SynScan hand hand controller, 2x10kg counterweights and GPS
- Carries a payload of 50kg
Sky-Watcher High Precision EQ8 Equatorial Mount w/ SynScan, GPS & Portable Pier Specifications...
Mount Type: German Equatorial
Counter Weight: 2x10 kg
Motor Drive: 0.9 deg Hybrid Stepper Motor
GoTo: SynScan hand controller
Tripod Height: Pier Stand
Tripod Weight: 29.4 kg
Shipping Weight: 29.4kg+20kg+11kg
Shipping Carton Dimensions: 98x48x50 cm3; 66x61x71 cm3; 24x13x26 cm3
Power Supply: DC11-16v 4A
Payload Capacity: 50 kg
Tracking Modes: EQ, Freedom Find (dual-encoder)
Tracking Rates: sidereal, solar rate, lunar rate
Slewing Speed: Maximum 3.3 degrees/second
Guiding Speed: 0.125x, 0.25x, 0.5x, 0.75x, 1x
Sky-Watcher Product Number: BD180601
"For the last 4 months I have been using the fairly new SkyWatcher AZ-EQ6 mount for my Explore 152-mm apo refractor, and it does a very good job for a portable mount. Since I am now putting heavy lenses on the telescope, and will soon by adding a parallel optical tube, it was recommended to me that I consider the even newer and much heavier duty SkyWatcher EQ8.
I picked up the new mount yesterday from Ray Khan''s shop (very good service, BTW) and took it up to our cottage in Muskoka late yesterday afternoon, hoping to have enough time to unpack it and set it up for use last night.
The EQ8 is massive. For a guy who bought his first scope 43 years ago and is not quite as young as he used to be, I would say that it is almost at the limit of portability. The equatorial head alone weighs as much as the entire AZ-EQ6 mount, but the heavy duty handles make it a lot easier to pick up and set down precisely on the tripod pier.
The mount is quite easy to put in the car and quick to assemble in the field. Once I got up to my dark site in Algonquin (290 road km north of Toronto), I had the mount unpacked, set up and polar aligned, and the scope and camera mounted and ready to shoot, in about 35 minutes - even before twilight ended. The polar scope is not like most others; it does not fit into a hole in the polar axis; rather, it attaches to the equatorial head on a heavy gauge bar and hangs off the side of the head, and can be removed quickly with two Allen screws. In spite of the unusual design, polar alignment is easy and quite accurate. I am still hand guiding the old-fashioned way for now, and during a 15-minute exposure of M31, there was NO drift that I could discern in either RA or declination at 120x guiding power.
I must say that this is a serious astrophotography mount. With the refractor and a heavy 400 mm lens and camera body mounted on top, I had to use only one of the two supplied counterweights, and it was only half-way down the counterweight shaft! Clearly this mount can handle its advertised 50 kg payload capacity. Now, it''s not cheap - it comes in at almost exactly twice the price of the AZ-EQ6, but already I have no doubt that it is worth the price." --Michael Watson, Royal Astronomical Society of Canada, Toronto, Ontario.