Both cameras require a lens adapter tube, on which to mount the wide angle lens. These tubes sell for about $20.
Minolta lists a wide angle kit, lens and tube for $120. You are not going to save much by buying another brand of lens.
The Olympus lens sells for a good deal more than that.
There are lots of lenses available. Are they better than the Olympus lens? No.
Here is a site that sells lenses and adapter tubes:
You should first try to find a bargain price for the Olympus lens. It is a highly rated lens. You might find it one on ebay.
I am considering buying either the Minolta Dimage Z2 or Olympus c-750.
For both cameras you can purchase wide angle lenses. When you buy them from the manufacturers, they are quite expensive. Does anybody have any experience busying such accessories from Ebay? Does manufacturer make a big difference. On Ebay, they have packages for $ 80 for a Macro lens and a Wide Angle lens together.
Also, the manufacturer sells a wide angle attachment with .75 and at e-bay they sell some with .45. What do these numbers refer to and how will they affect a 38 mm lens differently?
Would greatly appreciate an answer to these questions!