I have this as a grab and go and it makes an excellent starter rig.
- iOptron SkyGuider Pro
- William Optics RedCat51
The right Rokinon 135mm are a little over half the price of the RedCat so your paying more to start with it in the long run. But it is a nice lens I understand.
I fiddled with the regular camera lens at first, some were fine others were not. When I was tired of getting bad images from poor optic's I bought the WhiteCat51 (Mostly the same as the RedCat) and this was my first image with it. Disclaimer: I've been imaging with a larger scope before this so is not my first. Just my first on the SkyGuider Pro & WhiteCat setup.
We can suggest other options but sticking to what your looking at and on a tight budget you will not go wrong with your first two options but note that your third the WO ZS 61mm will need a flattener to get full benefit.
The iOptron CEM25P is an excellent starter. I started with one and it was great. As for scopes the WO Doublets are fine but Triplets are generally better. Both require flatteners for good imaging.
The SkyWatcher EQ5 I understand is thought highly of so nothing wrong going with one of those.
I believe your thinking is on the right path.
If your budget is flexible enough from high to low on equipment.
WO ZS 61mm
The easiest to start with is the SkyGuider Pro with any of those optic's. The SkyGuider Pro requires a tripod to also be purchased and you want a solid one so your looking at another 100 bucks and up on that. Though the easiest, it is also the most limiting.
If you were to pin me down to one of these setups I would have to go with the iOptron CEM25P and the WO ZS 61mm and a flattener. In the long run it will keep you happy for quite awhile. I think with the SkyGuider you would be happy too but looking to upgrade in a shorter period of time.
Edited by scadvice, 14 January 2020 - 01:34 PM.