Autofocus setup using ZWO eaf & DSLR lens advice

[Notty]

Hello. As title, has anyone had any luck setting up the above? I have a Samsung 135mm which I’ll be using with my 1600mm and controlled by ASIair. If anyone’s found an off the shelf transmision/belt drive solution or gone through the pain of assembling one would you mind sharing the details at all? Thank you in advance.

andrew

[Tomatobro]

Take a look at this as a possible alternative Ebay

303607598518

 

[Notty]

7 hours ago, Tomatobro said:

Take a look at this as a possible alternative Ebay

303607598518

 

Hello, thanks but I can’t search this on eBay - thinks I’m looking for a userid?

[knobby]

https://www.ebay.co.uk/itm/303607598518

[Notty]

17 hours ago, knobby said:

https://www.ebay.co.uk/itm/303607598518

Ah ok, thank for that. I already have that setup but want to automate it. I'll be doing lrbg+narrowband and want to make it as precise as possible.

[bottletopburly]

@Notty this may be what you want 

https://deepskydad.com/laf

[Notty]

On 01/08/2020 at 09:46, bottletopburly said:

@Notty this may be what you want 

https://deepskydad.com/laf

Thanks for that, it looks nice especially the mounting arrangement. I went for this setup; astrojolo supplied mounting rings and guidescope mount plus a toothed pulley/belt arrangement inspired by another user on here. I haven’t connected it all up to try it yet, I fear autofocus won’t work as I’m told there won’t be enough back focus  behind infinity to automate it but at least I should be able to control the motor focuser through asiair without touching it, which should still be more precise.
 

[Scooot]

On 09/08/2020 at 21:10, Notty said:

Thanks for that, it looks nice especially the mounting arrangement. I went for this setup; astrojolo supplied mounting rings and guidescope mount plus a toothed pulley/belt arrangement inspired by another user on here. I haven’t connected it all up to try it yet, I fear autofocus won’t work as I’m told there won’t be enough back focus  behind infinity to automate it but at least I should be able to control the motor focuser through asiair without touching it, which should still be more precise.
 

Hi Andrew, how did this work out in the end?

I’m interested in a similar setup.

[Notty]

On 21/01/2021 at 12:51, Scooot said:

Hi Andrew, how did this work out in the end?

I’m interested in a similar setup.

Hi Richard, apologies for taking so long to reply to this. It works better than I had hoped, there is (on my example of the lens anyway) more than enough back focus past infinity that the autofocus works like a dream through the ASIair. I'm really happy with it.

[Scooot]

1 hour ago, Notty said:

Hi Richard, apologies for taking so long to reply to this. It works better than I had hoped, there is (on my example of the lens anyway) more than enough back focus past infinity that the autofocus works like a dream through the ASIair. I'm really happy with it.

No probs, that’s great to hear.  

[Richie092]

I’m currently building this system. It looks pretty good so far but not tested yet. 
https://www.prusaprinters.org/prints/56485-zwo-eaf-adapter-for-samyang-135mm-lens

[Space Oddities]

I have a similar system, but I'm using this handy dovetail plate. That allows me to mount the EAF, the ASIAIR Pro and the guide scope together.

The EAF is mounted on an Arca Swiss clamp, which allows me to slide it in and out easily and adjust the tension of the belt.

I have since switched the ASIAIR and the guide scope, which seems much better for cables (and the style!)