B&H is pleased to announce the GR IV HDF - Highlight Diffusion Filter, a new variant of their much sought-after ...

The Highlight Diffusion Filter in the new camera diffuses light into a soft, gentle look that also pairs well with “Cinema” ...

When you use DPReview links to buy products, the site may earn a commission. Image: Ricoh Ricoh has announced that the GR IV ...

[IMSAI Guy] presents for your viewing pleasure, a nice video on the topic of optical filters and mirrors. (Video, embedded below) The first optical device is a simple absorption filter, where incoming ...

Human kidneys produce more than 4 million litres of virtually protein-free primary urine in a lifetime. In healthy individuals, the sieving process is accomplished by the glomerular filter without the ...

The Annals of Probability, Vol. 35, No. 2 (Mar., 2007), pp. 739-757 (19 pages) We develop the mathematics of a filtration shrinkage model that has recently been ...

When you use DPReview links to buy products, the site may earn a commission. Image: Ricoh Ricoh has announced that the GR IV HDF is officially coming in January, slightly later than the "winter 2025" ...