Optec – Hercules Focusing Rotator


Optec – Hercules Focusing Rotator. Full remote ASCOM micro focusing and rotation for imaging telescopes.

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Optec – Hercules Focusing Rotator

Low Profile Combination Focuser & Rotator

Optec’s new Hercules rotating focuser combines camera field rotation with telescope focus. Slightly smaller than its big brother, the robust Gemini focusing rotator, Hercules provides a full 3-inch clear aperture and 0.35” (about 9mm) of travel while maintaining a thickness less than 2-inches.

Optec’s Best-in-Class ASCOM and Alpaca drivers are capable of alt-az de-rotation, image orientation and composition in addition to the traditional guide-star acquisition capability.

Thickness: 1.81″ to 2.16″ (46.0 to 54.9mm)


Various Versions Available:

  • Standard
  • Takahashi Epsilon E130 Kit
  • Takahashi Epsilon E160 Kit
  • Takahashi Epsilon E180 Kit



Clear Aperture: 76.2mm

Height: 8.17″ (208mm)

Width: 7.48″ (190mm)

Thickness: 1.81″ to 2.16″ (46.0 to 54.9mm)

at midpoint: 1.99″ (50.5mm)

Weight: 3-lb. 8 oz. (1.6 kg)


Telescope side: OPTEC-3600 receiver

Camera side: OPTEC-3000 3-inch receiver


Total Travel: 0.350″ (8.89mm)

Total Steps: 112,000 steps

Resolution: 0.079 micron/step



Total Steps: 168,000 steps

Resolution: 7.7 arc seconds / step

Rotation Speed: variable, ~ 3 degrees/second


Circuit board: Internal

Communications: USB-C and Ethernet

Additional: Temperature Probe 3.5mm socket

2.5 x 5.5mm power socket


Power draw: 1.25A max, 0.6A while moving, 0.4A holding

Input voltage: 12VDC

Input connector: 2.5×5.5mm barrel plug, center pin positive


Compatibility: ASCOM and Alpaca

Capabilities: Focus, Guide star acquisition, field composition, Alt-Az De-rotation

De-Rotation: Compatible with Planewave L-mounts, TheSky X, Maxim D/L, N.I.N.A.

Any fully configured mount with ASCOM driver.

Included in Package:

3.5mm phono style temperature probe

12-volt DC switching power supply w/ wall cord

Cat-6 Ethernet cable, 7-ft. length

USB-C cable, 6-ft. length

5/64″ T-handle hex driver

Additional information


Standard, Takahashi Epsilon E130 Kit, Takahashi Epsilon E160 Kit, Takahashi Epsilon E180 Kit


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