Last days I have been preparing my wide field astroimaging setup. There have been some changes in conception and eventually I decided to give up on DSLR and purchase another QHY163 camera, but one shot color version. So I plan to fight twofold: any camera (mono with filter wheel or color) can work with any optics (130mm refractor or 135mm lens). Here is some first shots with Samyang lens talking to QHY163M mono camera through Baader hydrogen alpha filter. Apparent field of view for the images below is pretty large, about 8 degrees. So more less the same as with popular 7x binoculars.
Large version http://astrojolo.com/wp-content/uploads/2017/03/AurH.jpg
And here is wide field setup with mounted mono camera and filter wheel. It looks the same with color camera version, but instead of filter wheel there will be filter drawer for 2″ filter (UV/IR cut or IDAS LP). It is pretty heavy though, about 3.5kg, cannot sit on lightweight mount.