The Cokin P Series Full Graduated Blue Filter is part of Cokin's popular P Series filter system, designed for photographers who want to enhance their images with special effects. Here's an overview of this particular filter:

Overview:

• Filter Type: Full Graduated Blue Filter
• Series: Cokin P Series (also known as P-size filters)

Key Features:

1. Graduated Effect:

   • The graduated blue filter transitions from blue at the top to clear at the bottom. This is particularly useful in landscape photography, where you want to enhance the sky without affecting the foreground.
   • The entire graduation means the blue colour gradually fades from one end of the filter to the other, covering the whole filter height. It allows smooth blending with natural light and colour, giving images a more dynamic and vivid look.

2. Filter Size:

   • The P Series filters are 84mm wide and, when used with the appropriate adapter ring, are compatible with a wide range of lenses.
   • The Cokin P Series system is highly versatile and can be mounted on lenses with diameters ranging from 48mm to 82mm by using the correct Cokin adapter ring.

3. Creative Usage:

   • The Graduated Blue filter is perfect for enhancing skies, making them appear more profound and dramatic without overexposing or affecting the land portion of a landscape photo.
   • It's commonly used to add colour to sunsets, seascapes, or scenes with washed-out skies.

4. Filter Holder:

   • To use the filter, you'll need the Cokin P-Series Filter Holder. This holder lets you slide the filter in place and adjust its position vertically, giving you control over where the blue graduation begins in your frame.

5. Material:

   • The filter is made of resin, a lightweight and durable material which provides excellent optical clarity without being overly heavy or fragile.

How to Use:

1. Attach the Filter Holder: First, attach the P Series filter holder to your lens using the appropriate adapter ring size.
2. Insert the Filter: Slide the Full Graduated Blue filter into the holder.
3. Adjust: Position the filter so the blue graduation starts where you want it, often aligning the blue with the sky in your frame.
4. Shoot: Capture your image, adjusting exposure as needed. The graduated effect should enhance the sky's colour without overdoing it on the ground or subject.

When to Use:

• Landscape Photography: This technique is beneficial for bringing out colours in skies, mainly when shooting landscapes with bland or overexposed skies.
• Seascapes: Enhances the natural blue of the water and sky, giving coastal shots a rich, vibrant feel.
• Sunsets: This creates a dreamy, colourful effect in scenes where the sky is a critical composition component.

Compatibility:

• It is compatible with all Cokin P Series holders and works with lenses of various sizes using the correct adapter ring.

This filter is an excellent tool for creative landscape photographers. It helps add depth and intensity to scenes involving sky and water.