Instead of buying a really high aperture 25mm lens for the bokeh, I was thinking that if I got a .45x wide angle adapter on a 50mm 1.4, I might get the similar results, if not, then a narrower DOF since I would be closer to the subject. However, I'm not sure if a wide angle adapter will keep the depth of field and just increase the field of view. If it does keep the DOF, then what is the cost of it? In other words, does it create too much color aberrations or make the images very soft?
Some details on the specific items I'm looking at: 50mm 1.4 Nikkor APS-S Nikon D3300 Snap-it digital .45x wide angle adapter