Tiffen 67mm 21 Filter (Orange) and 15 Filter (Yellow)

Tiffen 67mm 21 Filter (Orange)Orange is the 'medium' of the contrast filters for black and white photography. Milder than red and stronger than yellow, it completely eliminates ultraviolet, darkens blues and greens and is excellent for telephotography of mountain and marine scenes. Available in most sizes in medium #16 and dark #21.Tiffen 67mm 15 Filter (Yellow)The Tiffen 67mm Deep Yellow #15 is commonly used for a noticeable increase in contrast with black and white films. It is also used to increase the separation of clouds and sky in black and white photography.  Especially useful for clear contrast between blue sky with clouds and foreground.  Enhances landscapes, marine scenes and aerial photography with more dramatic effects than Yellow 8.

• The 21 (Orange) filter absorbs blue and blue green light while the 15 (Yellow) filter renders sky dramatically darker when used for black-and-white imaging.
• Both filters have 67mm diameter to fit standard lens threads.
• The 21 (Orange) filter is deeper than Orange 16 and the 15 (Yellow) filter produces more dramatic effects than Yellow 8 filter.
• Primarily used for black-and-white photography.