Hoya 58mm Dark Yellow Multi Coated Glass Filter (#52)
The mildest of the contrast filters for black and white photography, yellows produce the most natural tonal range.
By absorbing ultra-violet, violet and blue it moderatly increases contrast in sky, foliage and architecture photography.
It's natural tone reproduction in landscapes, cityscapes and portraits make it very useful for all daylight exposures.
Available in most sizes.