Black Dot Texture Screens
The Black Dot Texture Screens are handcrafted, and sold only as a complete set of five filters in a wood storage box. Patented by Harrison & Harrison, these glass filters soften images without the whitish veil, retaining contrast as the degree of diffusion increases. An exposure compensation of approximately on stop is required for each filter, regardless of the degree of diffusion.
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Diffusion Filters
The degree of diffusion you will achieve with any diffusion filter can be affected by image size, exposure and lighting contrast. It is best to have a range of diffusion filters available to obtain the effects you desire, despite these variables.
As with any new piece of photographic equipment, filters should be thoroughly tested under different conditions, with each lens and at various apertures to determine the results you can expect in each situation. Keeping good records will assure predictable results every time they are used. |