|Zomei Pro MC Ultra Slim Wide Angle Converter|
This Zomei Pro MC Ultra Slim Wide Angle Converter is an auxiliary lens that is attached to the front of your primary lens so that it can make the view wider. It seems to work best with 28mm wide angle lenses. It didn't work with other focal length (eg. 50mm) and only shows blurred images.
When this adapter is mounted on my 28mm lens, I have to set the focus to its minimum focusing distance (0.2 meters). Then I use anywhere between f/5.6 to f/32 for best results. By 'best result', it still doesn't show best result, because the images are still not precisely focused.
With a little experiment to prove my hypothesis that the distance between the auxiliary and primary lenses are not correct -- I held the adapter farther from the front of the primary lens by an extension of 40mm. Now the images became precisely focused!
I gather that the distance is not correct and so this ultra slim adapter is a bad design. This probably means that those regular wide angle adapters with longer length are better for use.
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