JMI NGF-CM with ZWO EAF

Since the JMII NGF-CM is lower profile, I want to see if it could be used with the Canon FD 300mm f2.8L.

It might be able to replace the CYCK focuser entirely, to use with my Ranger like now, to use with my 8" SCT, and to use with my 85mm refractor for deep sky imaging.

The first feasibility test was to attach the ZWO EAF to the JMI focuser, to replace the existing JMI mini DC motor.

Original JMI mini DC motor removed.

Replace the coupler on the focuser shaft.  It was for the DRO controller which I had sold.  Now it's attached to a coupler bundled with the ZWO EAF.

Next step is to attach the focusing motor, and I have proper screws on hand fortunately.

The next test would be to try it out on the Canon FD 300mm f2.8L to see if it could reach infinity focus.  If that could be done, I am going to keep the lens.  I now had it posted on ebay but so far no one really placed a bid yet.

I did a handheld test and it works with a 20mm eyepiece.  Since the 533mc could take a 2" nosepiece, and thus saving 1cm from the 2" to 1.25" adapter!  This makes even more room for reaching infinity focus.

Specification of the adapter: everything like my existing Ranger adapter, except it's with 77mm female thread instead of 76mm.

The project looks quite promising.

I will certainly keep my Canon FD 300mm f2.8L if that could be done.  I will then be able to have autofocusing with this lens!  My 533mc has a relatively small sensor which works pretty well with this ancient lens.

Next step is to make a SCT adapter for the JMI-CM, and then a 2" nosepiece.  The CYCK focuser could then be sold!