Astrodymium Ring System with ZWO EAF & ASIAIR Mount for Samyang - Rokinon 135mm F/2 Lens

AstrodymiumSKU: RS-135-EAF.S

Riser Block Add-on: No
Mounting Point Add-on: No
ZWO EAF Adapter: Side Mounted
Sale price$84.99


The Astrodymium Ring System is an all in one mounting & autofocusing solution to using the Rokinon/Samyang 135mm F2 lens for astrophotography. The ring system allows a ZWO ASIAIR, EAF, and any guidescope to be easily connected to the 135mm lens.

With a ZWO EAF (not included), it will be possible to electronically control the focus on the 135mm lens. This allows you to automate your imaging sessions, so you don't have to worry about focus shift due to temperature changes or filter offsets.

Now shipping with higher quality steel thumbscrews for the guidescope rail!

The ring system uses two rings with a hinged design to securely hold the 135mm lens in place. The hinges make it possible to remove/install the lens without needing to remove your DSLR / imaging camera first. Large thumbscrews also mean that no tools are needed to loosen or tighten the rings down onto the lens.

Attaching a guidescope to the lens is easy with the top rail. Simply slide the guidescope into the rail, and secure it with the two metal thumbscrews. Other accessories that have a vixen style dovetail will also fit.

On the sides of the hexagonal rings are M5 mounting points for easy attachment of extra accessories, such as an ASIAIR Pro/Plus with the optional mounting plate add-on. Each threaded point uses stainless steel threads for a strong and corrosion resistant connection.

All parts for the Ring System are 3D printed out of durable PETG plastic that can handle temperatures of up to 80C (176F), and down to -25C (-13F).

Screws for connecting the rings to a dovetail bar are included.

What's included by default:

  • 1x Set of rings (front + rear) and guidescope rail
  • 2x M3x12mm stainless steel thumbscrews
  • 2x M5x12mm button head screws
  • 2x M6x16mm socket head screws (You will receive longer screws if you purchase the riser block add-on)
  • ZWO EAF Adapter for Astrodymium Ring System:
    - Fasteners
    - Printed Parts
    - 1x Timing belt
    - 1x Metal pulley
    - Instructions are provided inside the box as an online manual

To complete installation you will need 2, 2.5, and 3mm size metric hex keys (2mm & 2.5mm are already included with the ZWO EAF).

Visit the product pages for each add-on to learn more information about them:

Name: SKU:
Riser Block Kit RS-RISER
Flat Mounting Plate for ZWO ASIAIR Pro & PPB Micro RS-FMP
96mm Accessory Rail RS-AR
ZWO EAF Adapter / Mount (Bottom & Side-Mounted) RS-EAF.S / RS-EAF.B


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