Hi Marcin,
More on lenses… I use my 330 with both the Blue Eye (0.45) and the Red Eye (0.3) lenses from WayCool with great results (despite being very inexperienced!) – these lenses are tiny! Not having used any other lenses, I don’t have a lot of comparison apart from with other people’s footage, but the image is very sharp on a large screen, and there is absolutely no visible distortion around the edges or corners, and no visible degradation in the image.
The method of getting the best set up is slightly different as the lenses are single element and the infinity focus does not work. For best results, turn of all AE modes then put on the lens and let the auto-focus adjust to a suitable distance before switching it to manual focus – you can of course still tweak the focus manually if you want too. You can then use any AE mode as normal once the focus is locked. I find I can also zoom in up to about half way without any problems if required (I have jumped with the Red Eye zoomed in to almost the Blue Eye level when I didn’t have time to swap them on a short call). The Blue Eye is great for outside stuff, and the Red Eye is great for inside stuff, and I’m very interested in seeing what the Black Eye will give here too.
WayCool have just modified their lens mount slightly on the Red/Blue/Black to accept a newly developed UV filter so check that you are getting the latest ones when you place your order (I think they are designated with an 'X'). Though I believe they have also created a UV filter that will fit securely over all existing lenses in the field.