Corvane Brackwater GoTo alt-az mount, head only

Specifications

Description

The Brackwater is a GoTo alt-azimuth mount for telescopes and spotting scopes with a combined load of up to 7 kg. Its motorized altitude and azimuth axes slew to targets from a built-in database of 42,000 objects, so you can select an entry on the hand controller and let the mount carry the telescope to it. Once the object is centered, the mount keeps it in the field through sidereal tracking.

Set up the mount by leveling the tripod, pointing the head roughly north, and entering your latitude, longitude, date, and time on the handset. Two- or three-star alignment corrects for small errors in leveling and orientation, and the mount then applies that model to every goto. Keep the tripod stable, because a flexing base produces a pointing error that the alignment cannot correct.

Because the mount tracks in alt-azimuth, the field of view rotates slowly around the center of the eyepiece over the course of a session. This does not affect visual observing, but long exposures of a few minutes at high magnification will show rotation at the edges of the frame. Shorter sessions and moderate magnification keep the effect small.

The Brackwater head weighs 4.6 kg. Keep the combined load of the optical tube, diagonal, eyepiece, and finder well below the 7 kg rating, and balance the tube on the saddle before you start an alignment. An unbalanced tube strains the drive gears and slows settling after each slew.

Power comes from eight AA batteries in the handset tray or from a 12 V DC input, so the mount can run in a garden or at a remote site without mains supply. Use the handset menu to switch tracking off when you observe terrestrial subjects.

About this configuration

This listing covers one configuration of the Corvane Brackwater GoTo alt-az mount, defined by its support, add-on, finish, and edition year. This configuration is the mount head alone, so you supply a tripod or a pier with a matching top plate. Buying the head only makes sense when you already own a sturdy tripod or a permanent pier in the garden. A weather cover suits observers who keep the mount outdoors on a pier or a covered patio.

Titanium gray anodizing shows dust less than black and keeps a uniform look over the years. The 2023 edition uses the same gears and bearings as later years, with small differences in the clamps. The payload rating in the specifications applies to the mount head in every configuration of the Brackwater line.

What's in the box

• Alt-az GoTo mount head with dovetail saddle
• Tripod with leveling base
• Hand controller with coiled cable
• Eight-AA battery tray
• Fitted weather cover

Compatibility notes

• Accepts dovetail bars up to 50 mm wide.
• The 3/8-16 base thread fits most photo tripods; a 1/4-20 adapter is included.
• Suits telescopes up to about 100 mm aperture and a combined load of 7 kg for steady tracking.