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Optional Accessories

iEQ30 GTF81 
# 3000-GTF81

The iEQ30 with William Optics GTF 81

We've partnered with William Optics to give you the best of both worlds!

The Mount
The iEQ30 offers the next generation GoTo technology from iOptron®. It come standard with a calibrated dark field illumination polar scope, built-in GPS, and sturdy 1.5 -inch stainless steel tripod legsPlus, it offers premium performance in an easy-to-transport package. Priced affordably – the iEQ30 is definitely worth its weight in gold.

The Optics
The stunning new William Optics Gran Turismo 81APO is the new jewel of the apochromatic refractor world. From the pristine white finish on the CNC to the elegant darkred beauty which has more than just good looks... New GT81 features a 3-element objective using high-quality FPL-53 extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.


iEQ30 GTF81 
# 3000-GTF81

    The iEQ30 Mount

    • Specialized astrophotography mount ideal for entry-level and intermediate astrophotographers
    • Payload: 31 lbs (14kg)
    • Mount weight: 15 lbs
    • Portable, compact, and sturdy German equatorial mount with the highest Payload/Mount ratio (2.0) in the category
    • ST-4 autoguiding port capable of reverse guiding with autoprotection
    • Permanant periodic error correction (PEC)
    • Ultra-accurate tracking with temperature compensated crystal oscillator (TCXO)
    • Calibrated polar scope with dark-field illumination and easy polar alignment procedure, allowing for fast and accurate polar alignment
      Built-in 32-channel GPS
    • #8407 controller with Advanced GoToNOVA® technology
    • Resolution: 0.1 arc second
      Controller includes heating mechanism for working at low temperatures down to -20oC
    • RS232 port for ASCOM control
    • Includes Vixen-style mounting saddle.
    • Heavy-duty stainless steel tripod legs
    • Optional pier and hard case.
    • Accessories include: counterweight, extension bar, AC adaptor, 12V DC car plug adaptor, and RS232 cable


    The William Optics GTF 81




    Focal Ratio


    Focal Length

    478 mm

    Objective Type

    Five element with FPL-53 Air Spaced (2 groups), Fully Multi-Coated, STM coatings

    Resolving Power

    1.43 seconds of arc

    Limiting Magnitude


    Lens Shade


    DDG Focuser

    2" 360° Rotating Camera-angle Adjuster, 1:10 fine focus Focuser Travel Length 3.15" (80mm)
    1.25" Adapter

    1.25" Adapter

    2" Brass Compression Rings

    Field Stops


    Tube Diameter


    Tube Length

    440mm Fully Retracted 
    484mm Fully Extended

    Tube Weight

    3.7 kg


iEQ30 GTF81 
# 3000-GTF81

iEQ30 GTF81 
# 3000-GTF81

iEQ30 GTF81 
# 3000-GTF81