[janoskiss (Steve H)]

The UO Konig is not well suited to an f/5 Dob.

The least expensive solution I'd recommend is a 32mm GSO Plossl. It's a 1.25" EP with maximal field stop for a 1.25" (except for very few marginal exceptions - I mention one below) and costs only around $AU50. The 25mm is also good - will have proportionally smaller AFOV but more even illumination. It's perhaps the best <~$AU50 wide AFOV EP you can get.

For an f/5 Dob it gets tricky if you want more AFOV. Firstly, you'll want a 2" EP. Secondly, you'll want to stay away from budget EPs because they will not cut the mustard in an f/5 Newt. Second hand TeleVue Panoptic 27mm would be one of the best bang-per-buck widefield EPs for your scope. I had one for a couple of years or so and it was a very nice EP. But anything cheaper than that with the same AFOV is not worth the bother imho.

I myself am not keen on 2" EPs though (after having owned many). This is totally a matter of my own personal preferences after 10+ years of observing. It's purely the bulk and pocketability and me being lazy to swap out adapters.

I have a 35mm Ultrascopic and a 25mm Antares Elite as my wide AFOVs. The 35mm is something special: the widest AFOV EP you can get in the 1.25" format. Wider than the barrel size would normally allow because the field stop is past the barrel. Another fantastic option if you want to stick with 1.25" EPs is the 24mm Panoptic. But it's a bit of a crown jewel of the pano range so even used it's not cheap. You'll get a 27mm pano for less. There are other options these days that I have never looked through but are strongly recommended by others, e.g. ES 24mm 68-deg (Panoptic clone?), Hyperion 24mm...