How do I adjust the optical density of the HOYA Variable Density II Adjustable Filter with an ND Range? (HOYA Density II Adjustable ND Range User Manual)

Answer

manuals.plus

Feb 15, 2025 - 03:57 AM

To adjust the optical density of the HOYA Variable Density II filter, follow these steps:

1. Attach the filter to your camera lens by screwing it onto the filter thread.
2. Look through the camera's viewfinder or use the camera's live view function to compose your shot.
3. Rotate the outer ring of the filter to adjust the optical density. Rotating the ring will change the alignment of the polarized glass elements inside the filter, thereby controlling the amount of light that passes through.
4. As you rotate the ring, you will notice the exposure settings on your camera changing. The filter can reduce light transmittance from ND3 (1 2/3 stops, 0.5) to ND400 (8 2/3 stops, 2.6), allowing for a wide range of brightness/darkness control.
5. Experiment with different settings to achieve the desired effect. You can use slower shutter speeds and wider apertures with the filter to create long exposures or to achieve shallow depth of field in bright conditions.

Note: When using the filter at its maximum ND value and beyond (∇ matches with X), a common aberration called cross-polarization may occur. This can manifest as a darkened "X" pattern through the middle of the image and corners. To minimize this effect, it is recommended to use focal lengths of 28mm and higher for best results.

Additionally, it is advisable to cover or close the optical viewfinder during long exposures to prevent light leaks. The filter does not have front filter threads, so it may be challenging to attach lens caps for protection during transport. It is recommended to remove the filter and store it in the included case when not in use.