- Joined
- Aug 27, 2018
- Messages
- 192
- Reactions
- 122
- Age
- 53
It might be important to remind members as to what a polarizing filter does, namely increases saturation and reduce reflections from non metallic sources. One reason you need to be able to adjust the orientation of a polarizing filter is so the filter does not interfere with the camera being able to determine the correct exposure (polarizing filters also can interfere with autofocus systems) Circular polarizing filters solve this problem by having a standard linear filter which does the job by only allowing light rays vibrating in the correct ordination to transverse the filter, a second filter called a "retarder" scrambles the light so it now vibrates in all planes. You need to be able to rotate the filter to maximize the effect, a filter that does not rotate has limited value.
The Skyreat filters are not circular polarized although I have yet to have issues with the auto focus. I don’t use auto exposure so I can not comment. I thought I read somewhere online that they have no ill-affect on small cameras such as these but it’s the Internet so I take that into consideration.
As for the limited value of nonrotating filters, the mileage on that is going to vary from person to person But in general, I would agree. For someone such as myself however, the CPLs I do have are set at vertical and I don’t touch them.