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2 Unique

MEADE TELESCOPE COUNTERWEIGHTS

EZ Balance On-Axis Counterweight

2-Pound Azimuth Battery Compartment  Bias Weight

Why balance your scope?  A balanced telescope will track more smoothly.  Also, the drive motors and drive gears used in SCTs are quite small.  An unbalanced scope will lead to excessive wear on the drive train with early life failure of motors and gears.

 

The EZ Balance Counterweight

Many SCTs are very nose heavy.  Especially when equipped with a dew shield or a long focal length piggybacked secondary telescope., This is the situation that the EZ Balance is designed to correct.  This simple but unique 3.3 pound counterweight has a thin flange that fits between the telescope backplate and the EyeOpener (or the manufacturer’s supplied visual back).  It fits all 10″ through 14″ Meade and Celestron SCTs, from early models to current versions.  It does not fit the RCX series scopes.  And it does not fit 8″ scopes.

The EZ Balance has 2 unique features:

First, it is on-axis.  (Centered on a line that runs through the center of the tube).  Unlike rail mounted counterweights, if you don’t have any heavy accessories (such as a large secondary telescope)  attached to the top of the optical tube the scope will stay in balance regardless of the  orientation of the tube, and regardless of whether it is mounted on an Alt-Az or Polar type of mount. 

Second, it locates much further to the back of the scope than is possible with rail mounted counterweights.  This provides far more leverage than rail mounted counterweights, reducing inertial loading on the drives when slewing.  (If you have a heavy off-axis piggybacked telescope you will still need to position a rail mounted counterweight opposite to the secondary scope but typically, because of its extreme rear positioning,  you will achieve all axis balance with significantly less off-axis counterweight when also using the EZ Balance.)

Do you need this counterweight?  Loosen your declination clutch.  If your scope is nose heavy you can roughly simulate the effect of the EZ Balance by hanging a 3.3 pound weight from a string wrapped around the scope’s visual back.  You may still have a slight imbalance, but if this reduces the overall amount of unbalance in your system you’ll want the EZ Balance.

The counterweight has a protective covering on the back of the casting to prevent scratching of your telescope’s backplate.  The counterweight is easy-on easy-off, so it can be readily removed to keep weight to a minimum when carrying your ‘scope.  No screws or rail systems are required.

$48.99 plus postage    Order below……….

2-Pound Azimuth Battery Compartment  Bias Weight

The prime reason for Meade’s big SCTs being equatorially mounted is to facilitate astrophotography.  In the equatorial mode, these scopes will not track with precision unless the drive gears are positively engaged.  This flexible lead weight fits into the battery compartment in the scope’s left fork arm, causing the scope to tend to rotate to the east.  Since the scope is slowly tracking to the west, the drive gears are positively engaged.  The image to the right shows the flexible weight installed into the battery compartment before the cover has been replaced.

 

Proper drive engagement is desirable at all times, but is critical for successful imaging. 

The west (right) fork arm in Meade’s big SCTs is a bit heavier than the east (left) fork arm due to the drive being in the right hand fork arm.  In equatorial mode this out-of-balance condition causes the scope to try to swing toward the west.   As a result, the drive gears are holding the scope back to the east rather than pushing it forward to the west.  You are depending upon gravity to actually drive the scope, and the friction in the system makes this a very “iffy” thing.

It’s easy to test a scope’s azimuth balance.  When the azimuth drive is unlocked, gravity may rotate the scope to the west.  But bearing friction is present and the scope may not turn freely without a gentle push.  Giving the scope a gentle nudge to the east might cause the scope to turn a small amount east.  But giving the same gentle push toward the west will cause the scope to rotate quite a bit further.

No one but a beginner would consider operating these scopes with “C” cells as they have a very short life and once their peak charge is gone the scope can operate erratically.  In this modification, the battery holder is unplugged and replaced with a flexible heavy mesh bag containing lead shot.  This bag of shot will mold itself into the space left by the battery holder.

$24.99 plus postage    Order below……….

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Order 3.3 Pound EZ Balance Counterweight    $48.99

Ship within USA
$48.99 + $9.65 postage =  $58.64

Ship to Canada
$48.99 + $45.40 postage =  $94.39

Ship all other countries
$48.99 + $67.25 postage =  $116.24

Order 2 Pound Azimuth Bias Weight  $24.99

Ship within USA
$24.99 + $9.45 postage =  $34.44

Ship to Canada
$24.99 + $33.65 postage =  $58.64

Ship all other countries
$24.99 + $48.95 postage =  $73.94