Meade LXD-75 German equitorial telescope mount astro-imaging astrophotography obseratory scope platform specifications and description

Meade LXD-75 Telescope Mount

Inexpensive Go-To German Equatorial Mount

 

 

LXD75Mount1

The Meade LXD-75 mount is a lightweight, inexpensive (sells used for around $400) German equatorial telescope mount ("GEM") intended for relatively small and light scopes. It uses a similar AutoStar control system to the larger LX200 mount, so is convenient - not having to learn different control systems. It comes with a tripod, and I also have a case for it and additional counterweights, as well as both AC power supply, and DC battery pack for field operation.

For any non-astronomers reading this, I should explain that "German Equatorial Mount" ("GEM") doesn't mean that this mount comes from Germany, but that it uses a design (which may have been originally from Germany?) with the declination axis on top of the right ascention axis. Please refer to Wikipedia and this ARTICLE or this ARTICLE on German Equatorial Mounts. I should also explain that "Go-To" means that the mount has electronics, including the drive motors, encoders, and some type of computer to enable entering a location (or searching for an object), pressing one button, and having the scope "go to" the desired location or object. There are GEMs operated entirely by hand (with "setting circles", which are calibrated scales of Right Ascension and declination). There are GEMs operated by hand with encoders, with readouts identifying the location (rather than reading setting circles). And there are GEMs that are Go-To. All of these are motorized, usually in both the right ascention (needed to undo the earth's rotation) and declination axes, but have varying degrees of automation in moving the scope to a specific object (location) in the sky.

While I have used the LXD-75 on its normal tripod with my Megrez 90 (as shown in the image below), I recently bought an interesting adapter tha allows mounting the LXD-75 equatorial head to the Meade Giant Field Tripod (!) - shown in the photo above. This has allowed me to continue using the driveway mounting system I developed for the larger system with the small LXD-75 mount. As I sold my Megrez 90, and have the FSQ-106 mounted on the LX200 (on the Paramount ME in the observatory), I am now using the LXD-75 mount for imaging with Nikon lenses - which do not require very high tracking accuracy. I do have the AP909 accessory, which allows controlling the mount with a standard guider input (from an astronomical CCD camera), but I have not done much astro-imaging yet with the LXD-75.

The LXD-75 mount on its normal tripod, carrying a Megrez 90 refractor, is shown below:

LXD75 on Tripod

The LXD-75 is convenient, as I already had the LX200, and the AutoStar operating system is basically the same for both mounts. I have found that for making DSLR pictures with short focal length lenses (e.g., 85-180mm), the LXD-75 does a great job of tracking for several-minute exposures.

Meade LXD-75 German equitorial telescope mount astro-imaging astrophotography obseratory scope platform specifications and description