To use the holder you need an adapter for each lens. To avoid vignetting largely, one should rely on the wide-angle adapter. Without Wide Angle Adapter holder vignetting even with only two slots at full frame with a 24-70mm lens already noticeably. On lenses with a smaller focal length it is then no longer usable because the screws are clearly visible in the image. So practically, the construction with bolts and knurled nuts for the conversion, so it is disadvantageous for `Photographing.
The holder is attached to the lens adapter with a knurled screw which ensures clamping. Since one depending on the subject, however, must revolve around the lens axis the holder, loosening the screw is required again. At LEE dissolved with a spring-mounted latch better because thanks to the two-sided form lock the holder can not slip off the adapter. When Formatt Hitech filter holder must be something more careful when setting.
In the plug-in filter holder universal fit with 100x150mm. So you can also use competing products. The clamping of the filter takes place in the slot on both sides by springs. These are not too tight, so you can adjust the filter clean.
I am ultimately switched to a product of competition, although the Formatt Hitech holder despite lower price leaves a significantly higher quality impression. Unfortunately, the Holder pointed at my camera lens combination significant weaknesses in the application that were not acceptable to me. In principle, good product that builds something far unfortunately forward and therefore presumably can only be used with the wide-angle adapter with ease on the full frame.
