I have a canon 500d, and I'm looking for a wide angle converter for landscape photos. I've searched about it online and most of it were either ppl getting conned by paying exorbitant prices for them, or they were just unboxing and comparison videos. The ones that I've seen on the net are the vitacon 0.45x ones, the eBay ones that double up as a macro converter and the canon ones (apparently there are two kinds? And the WD-H58 is better than the WD-58H).
I would like to hear from people who have used it before, and would kindly tell me what to expect besides the soft corners and vignetting (are they really that obvious?). I intend to use it on my standard 18-55mm lens. An actual wide angle lens like the 10-22mm would be beyond my reach, unless there is a cheaper alternative that is in the "$500 or less" range. Another reason why I wouldn't buy an actual lens is that I hardly use my slr and I only need the wide angle for a paid study trip to France.
So what wide angle converters would you recommend (those that doesnt affect the picture with soft corners or vignetting) and where should I buy them to avoid paying a high price for them. Also does canon sell their WD-H58 0.7x here?
Also, what does those numbers with the x mean? I see some third party converters with numbers like 0.45x, 0.5x and like the canon converter 0.7x.
Thank you in advance for your help, and I look forward to hearing your valuable feedback.