In this review, we test Honl Photo 1/8" Speed Grid. The objective is to show the spot it creates with different flash zoom settings (against a wall and in portrait type setup). For more details about the grid itself, please refer to Honl Photo Speed Grid review.
In the both image sequences below, the distance from the flash to the subject was kept constant.
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Also, to make a comparison, there is an image below showing the spot created by Canon Speedlite 580EX II flash at 80mm zoom setting.
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As you can see from the pictures above, Honl Photo 1/8" Speed Grid creates a spot that evenly illuminates an area corresponding to the horizontal angle of view of a lens set at 80-85mm (the light falloff area is not included), which is about 24-25 degrees. Thus, from the distance of 6' (183cm), the spot without the edge area is about 31"-32" (79cm-81cm) in diameter.
The edges of the spot (falloff pattern) depend on the flash zoom setting. For wider edges and smoother light-to-dark transition, use lower flash zoom values. Higher flash zoom values produce more focused light and harder edges.
