iOptron 1.35kg Counterweight for SkyTracker / SkyGuider Pro, CEM26 & GEM28

iOptron 1.35kg Counterweight for SkyTracker / SkyGuider Pro, CEM26 & GEM28

  (9 Reviews)
✓ 2 year warranty


98x in stock shipped 1-2 working days

About this product

Model:  iop_cw_1.35kg_8605
Part Number:  8605

1.35 kg (3 lb) counterweight designed for the iOptron SkyTracker Pro and SkyGuider pro counterweight package (#3324). 

Suitable for use with the following mounts

  • SkyTracker Pro
  • SkyGuider pro
  • CubePro
  • Cube-A (Dual AltAz/EQ mounts)*
  • Cube-G*
  • Cube-E*
  • CEM26/GEM28
  • CEM25/ZEQ25
  • iEQ30 Pro/iEQ30
  • MiniTower/ II / Pro
  • AZ Mount Pro

* Works together with CW shaft (#8607) for Cube-A/G/E.


  • Weight: 1.35 kg (~3 lb.)
  • Outer diameter: 79 mm (~3 in.)
  • Inner diameter: 20.5 mm (~0.8 in.)
  • Height: 39 mm (~1.54 in.)

Customer reviews

Average Rating (9 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
It is weighty indeed.
13 May 2024  | 

I haven't weighed it but it works for me on my SkyWatcher Star Adventurer GTi mount.

Rating (max 5):  
Works with the SkyWatcher Star Adventurer GTi
26 October 2023  | 

Got this for my SWSA GTi. Arrived quickly and well packaged as you'd expect from FLO. Fits perfectly on the stock counterweight bar and it's nicely finished.

Rating (max 5):  
iOptron 1.35kg Counterweight
30 September 2023  | 

Item well wrapped, arrived earlier than expected

Rating (max 5):  
iOptron 1.35Kg Counterweight for Sky-Watcher AZ-GTi in EQ mode.
30 August 2023  | 

I added an iOptron 1.35Kg Counterweight for SkyTracker to a Rowan AZ100 3.75Kg SS counterweight used with a Sky-Watcher AZ-GTi in equatorial mode.The NEQ6 counterweight bar length required was reduced by x2.
The delivery time was 10 days earlier than expected - so pleased to start star tracking trials during periods of clear skies.

Rating (max 5):  
Perfect for Star Adventurer GTi Mount
20 July 2023  | 

I was at the limit for balance with my setup couldn't quite extend bar and supplied counterweight enough. This Ioptron CW fits as it designed for the SW shaft and give that little bit of extra weight to address my issues.

Rating (max 5):  
Great addition
09 January 2023  | 

Really happy with this purchase, bought for my HEQ5 to help balance my new Sky-Watcher 200P-DS, as suggested by FLO. Does the job great, small but of good quality and locks onto the bar perfectly. Thank you FLO!

Rating (max 5):  
A good match
23 October 2021  | 

Bought two of these for a Skywatcher HEQ5 Pro mount - they fit and are a good option when balancing lighter equipment. Good communication and arrived on time as advertised - thanks FLO!!

Rating (max 5):  
A Perfect Match
22 December 2020  | 

Excellent and well made as usual. For anyone that's going to buy a Coronado PST, that counterweight is with a perfect weight.

Rating (max 5):  
Worth the wait!
10 September 2020  | 

Well made, compact counterweight ideal for my purposes. Availability from manufacturer was limited but FLO as ever kept me right up to date. Thanks.


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