ESATTO 7.5" LP focuser + ARCO 7" rotator - The ultimate focusing rotator for very large telescopes @Primalucelab

Uploaded March 2025 | Updated September 2026, 17 hours ago

ESATTO 7.5" LP focuser with ARCO 7" rotator is the focusing rotator we designed even for the largest telescopes! This bundle (weight 13.5 kg) includes our most advanced motorized focuser and rotator designed for large professional telescopes, offering an ultra-low profile (90mm optical thickness), a massive 183mm free aperture, with extreme 0.08-micron step focusing resolution and 0.36 arcseconds per step rotation resolution. It provides seamless, high-accuracy positioning for research, spectroscopy and astrophotography applications. This system ensures unparalleled stability, high payload capacity (up to 40 kg), and full remote operation. Ideal for professional observatories and high-end research, ESATTO 7.5” LP + ARCO 7” delivers precision, reliability, and automation for large telescopes, revolutionizing focus and rotation control.

The ESATTO 7.5” LP focuser with ARCO 7” rotator is custom-built upon request, tailored to the specific telescope you intend to connect it to. As the price varies depending on the design, please contact us if you’re interested.

ESATTO 7.5 LP focuser + ARCO 7 rotator - The ultimate focusing rotator for very large telescopes

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$Replacing your stock focuser? How to check if you can reach focus with ESATTO Do you want to replace your telescope stock focuser with ESATTO? Our robotic focuser is available in different models offering the free aperture, weight load capacity and draw tube travel you need for your telescope and camera. After you choose what version of ESATTO you want to use, the first important thing you have to check is if you can reach focus by replacing your stock focuser with ESATTO. If your telescope has a long focus extraction (usually refractors, Schmidt-Cassegrain, Ritchey-Chretien, etc.) this will also help you to understand if you will need to add extensions. If your telescope has a short focus extraction (usually Newtonians), this will allow you to understand what version of ESATTO will allow you to reach focus. Read the article in our website: https://www.primalucelab.com/blog/support/replacing-your-stock-focuser-how-to-check-if-you-can-reach-focus-with-esatto/$

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