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Small black electronic polarscope with USB cable and metal adapter ring

iOptron

iOptron iPolar Electronic Polarscope with Adapter (3339-AVX) camera accessory

SKU CH-T3FC-KDHPA

Electronic polarscope enables precise polar alignment via USB without rotating the mount or locating Polaris

  • Installs inside RA shaft on most iOptron equatorial mounts
  • USB plug-and-play with no driver required
  • Works globally without hemisphere setting
  • Aligns without visible Polaris or Sigma Octantis
  • No mount rotation needed during polar alignment

Precision polar alignment tool

The iOptron iPolar electronic polarscope provides high-precision polar alignment for equatorial mounts. It installs directly inside the RA shaft on compatible iOptron models or attaches to other mounts using adapters. The device connects via USB with plug-and-play operation and requires no driver installation. It is designed for astrophotographers who need accurate alignment without manual star sighting.

Upgrade from manual polarscopes

This electronic polarscope replaces traditional optical polarscopes that require visible reference stars and mount rotation. The upgrade is worth it when observing from light-polluted sites where Polaris or Sigma Octantis are obscured. It also benefits users who want faster alignment without rotating the mount through multiple positions. The system works globally without hemisphere configuration.

Limited to equatorial mounts with RA access

The unit requires an equatorial mount with an accessible RA shaft or an appropriate adapter for external mounting. It cannot be used with alt-azimuth mounts or mounts lacking a polar axis. The USB connection depends on host software that supports the device for alignment routines. Compatibility is restricted to the listed mount models and similar designs with adapter support.

How it compares

Measured against everything we stock in Camera Extras & Accessory Packs, at today’s prices. Recalculated every night.

Price $166.99
Pricier than about 83% of the 2,266 comparable items (median $39.99).

Specifications

Product
Product typeOther

Questions about this item

Which adapter is required to fit the iPolar inside the RA shaft of an AVX mount?

The included 3339-AVX adapter lets the iPolar mount internally on the AVX RA shaft without extra parts.

What is the most common mistake when installing the iPolar on an iOptron CEM60?

Forgetting to seat the USB cable fully before tightening the RA-shaft collar causes intermittent connection.

How often should the iPolar's USB port be cleaned to maintain reliable alignment?

Inspect and blow out dust from the USB port every few imaging sessions, especially after outdoor use.

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