I am pleasantly surprised by what this adapter. I have a real fish-eye lens Pentax 10-18 mm and was able to compare the results. Considering the price, it would be wrong to deprive yourself. It fits on all targets by the filter ring and allows for surprising pictures. The end result is similar to that of the PENTAX lens, unlike almost circular in the small focal image. To start and / or fun, it's a purchase that's worth it.
