At the first seeing, when the lens surface was cloudy and enlarged, insufficient polishing or sand grain remained. Some things have polishing marks. It is somewhat dissatisfied with the fact that it is not impossible to use and the price is considered. There is no problem with taking in and out.
We will use it for visual inspection of the surface grinding condition of precision machined parts.
On 2016-08-03 21:58:12
When exposing the lens part 180 degrees from the protective case, you must apply more than expected force to your fingers. For this reason elderly people and women have some troubles. We will use it in expectation of familiarity with long-term use.