1. This is a field test with Formatt Hitech Pro ND10 Filter.
This field test will be focusing on the colour cast this filter produced and how easily it can be corrected. This filter comes in 2 version, 85mmx85mm (Cokin P) and 100mmx100mm. I am reviewing the former version.
As you would have know, this filter comes with a gasket to prevent light leakage but it cause severe vignetting. thus, i have removed the gasket and DIY my own gasket to seal a gap using a soft foam material from daiso, cut into size, double side tape it onto the holder instead of the filter. The Result turned out pretty well.
This test is not done is a controlled environment and has no scientific backing. It is based on my own opinion and experience.
3. Test 1: Density of filter
3.1 Shot without filter
3.2 Shot with Filter, 10 stops adjustment
3.3 Shot with Filter, 10 and 1/3 stops adjustment
3.4 Shot with Filter, 10 and 2/3 stops adjustment
3.5 Shot with Filter, 10 and 11 stops adjustment