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

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

£59.00
  (8 Reviews)
✓ 2 year warranty

:  

10x in stock shipped 1-2 working days

About this product

Model:  astdym_rs-135_int
Part Number:  RS-135-EAF.S

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

The Astrodymium Ring System is an all-in-one mounting and autofocusing solution for using the Rokinon/Samyang 135mm F2 lens for astrophotography.

The ring system allows a ZWO ASIAIR, EAF, and any guidescope to be easily attached to the 135mm lens, making it a versatile tool for capturing stunning astrophotography images. 

Allen hex keys are now included.

Experience Hassle-Free Imaging Sessions With Autofocus

 

With a ZWO EAF and the EAF adapter add-on, it is possible to remotely control the focus on the 135mm lens, allowing you to fully automate your imaging sessions. No more worrying about focus shifts due to temperature changes or filter offsets!

 

Quick and Convenient to Install and Remove

The included rings (lens collar) securely hold the lens and use a hinged design. This makes it possible to remove/install the lens without needing to remove your camera first. No tools are required to loosen or tighten the rings onto the lens.

Attaching a Guidescope is Easy

Simply slide the guidescope into the included top rail and secure it with the two thumbscrews. This rail also works with other accessories that have a Vixen-style dovetail (such as an ASIAIR).

Mount All Your Astro Accessories

On the sides of the rings are mounting points for easy attachment of extra accessories, such as an ASIAIR Pro/Plus/PPB Micro, with the optional mounting plate add-on. Alternatively, you can purchase another rail and attach other astro accessories, with a vixen-style dovetail, instead.


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). Each threaded point uses stainless steel threads for a strong and corrosion-resistant connection.

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

NOTE: The 'CINE' Samyang 135mm f/2 is not directly compatible. 

What's in the box

  • 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 Mount for Astrodymium Ring System:
    - Fasteners
    - Printed Parts
    - 1x Timing belt
    - 1x Metal pulley
    - Instructions are provided inside the box as an online manual

Customer reviews

Average Rating (8 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Better than I expected
03 May 2024  | 

The package arrived in Italy very quickly, unfortunately the Italian post is not as good as the English one. The object is designed with extreme precision and the 3D PETG printing is remarkable, it can be assembled easily and in a short time. Once the ASI focuser was mounted I measured a backlash of only 20 steps. The only flaw is represented by the rotation of the camera which requires loosening the screws of the EAF Asi, but I think there are no possible alternatives even in the design phase. The only possibility is to mount a field rotator between the camera and lens but this would no longer allow you to mount a filter drawer. The product is very good and makes it very easy to use the Samyang 135 as a wide-field astrograph of exceptional optical quality.


Rating (max 5):  
High Quality printed parts, robust design
08 February 2024  | 

I am very pleased at how well it went together and how robust it feels. The parts are printed with a high density and tolerances are good. Combined with a ZWO EAF it is really easy to get auto-focusing working and it works reliably and consistently without flexing the brackets. I've added a Raspberry Pi4 running Astroberry to make a compact ready assembled budget widefield imaging package. For those interested I found the maximum number of steps with the EAF to be around 21050. I havent tuned the backfocus yet but infinity seems to be around 800 steps from 0 (reverse stepping).

I read about the camera rotation procedure and was a bit concerned but actually it is simple and quick to do - you just need to practice it once or twice in the daylight. You need to remember that in the new rotation the EAF 0 point has changed.

I have a small quality of life suggestion that perhaps the designer can consider: I image with an ASI1600MM pro and filter wheel, I also use an ZWO 30mm guidescope with AS120mm mini. If the Accessory Rail extended 2 cm out towards the lens hood and a 4th hole was made for a locking screw then it would be much easier to position the guidescope+USB cable not to clash with the filter wheel as I rotate the lens for framing. As I have it now the guidescope shoe is as far forward as possible and is just retained by two screws. I've adjusted the focus so I can push the ASI120 further in to the guidescope tube. That gives me a few mm of clearance now with the USB cable plugged in.

All in all I'm very pleased with the result. It is much better than my own 3d printed solution that didn't survive more than two sessions. but then perhaps I'l print my own guidescope holder .


Rating (max 5):  
Really good.
05 February 2024  | 

Not had a chance to use this yet in the field, but I have put the rig together which was pretty easy, very well made too! I have deducted one star for two reason. Firstly I would have liked the AAP mount to be included in the kit and not have to have bought it separately, but I see why as others may not require it and also the screws to close the rings go from underneath up and always fall out when opening, a simple washer, holder or thread on the lower ring would have helped here, but overall really good product.


Rating (max 5):  
Excellent
06 January 2024  | 

Brilliant product, and exactly what I was looking for. I can tell that a lot of thought went into making this. It fits my rokinon 135 lens perfectly and basically turns it into a telescope. I had no issues installing the EAF and attaching my guidescope.


Rating (max 5):  
Astrodymium Ring System with ZWO EAF & ASIAIR Mount for Samyang / Rokinon 135mm f/2 Lens
08 January 2023  | 

Great ring system for Samyang 135 very
pleased with it I had one from another manufacturer at twice the price that was useless. this one is very well made and sturdy can highly recommend it.


Rating (max 5):  
Mounting rig
06 June 2022  | 

Well built piece of kit for the Samyang 135mm lens. Also enables the fitting of a ZWO EAF. Exactly what I wanted and delivered quickly from the team at FLO.
Also exceptional advice from the folk at FLO, as always. Many thanks.


Rating (max 5):  
Samyang 135mm F2/2 Lens holder
05 May 2022  | 

Really impressed with the product and they even have 3d printed dividers in the packaging itself. The 3d printed parts really hold the lens well and looking forward to first light with this as soon as the clouds depart!


Rating (max 5):  
Best one so far
15 April 2022  | 

Note: I bought this directly from Astrodymium before FLO started selling them.

This is now my third(!) set of 3D printed rings, and the Astrodymium is the best one by a long shot! The material used here feels solid, and all parts fit well together. There is no slop or movement when attached to the lens. And now you no longer have to MacGyver something to use your ZWO EAF! Just two screws, and you are done!

I removed a star due to the dovetail screws being made out of cheap soft metal. One of mine got stuck after the threads stripped off in the hex nut. In the end, I had to cut it out. Replace them with something better!

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