Simply put, depth-of-field is how much of a photograph is in sharp focus from front to back. Digital Landscape Photography: In the Footsteps of Ansel Adams and the Masters, Michael Frye, 2010.

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We can achieve critical focus for only one plane in front of the camera, and all objects in this plane will be sharp. In addition, there will be an area just in front of and behind this plane that will appear reasonably sharp (according to the standards of sharpness required for the particular photograph and the degree of enlargement of the negative). This total region of adequate focus represents the depth of field.The Camera (Ansel Adams Photography, Book 1), Ansel Adams, Tenth Edition, 1995

There’s no way to make lenses completely scratch-proof. Scratch-resistant coating will help to strengthen the surface of your lenses and improve durability, so they’re less likely to get scratched or damaged if you accidentally drop them or rub them against an abrasive material.  Adopting smart care habits is the best way to maintain the quality of your lenses. Store them in a cushioned case when you're not wearing them. When cleaning them, use a microfibre cloth (never paper towel, your t-shirt, or any other type of rough fabric) and lens cleaning solution or mild dish detergent.

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Another important control for landscape photography is depth of field, the amount of sharpness in a scene, from close to the camera into the distance away from the camera. It's sharpness in depth. Landscape Photography: From Snapshots to Great Shots, Rob Sheppard, 2012.

From anti-reflective lenses, which reduce glare, to C Shield, which protects your lenses from daily wear and tear, lens coatings can enhance your vision, extend the life of your lenses, and provide added comfort.

A six-in-one lens coating solution. These factors work together to keep your glasses cleaner, stronger, and smarter – so you can focus on all the things in front of you.

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No more worries when walking in the rain! C Shield's hydrophobic lens coating means water droplets won’t stick to your lenses.

Depth of Field (DOF) is the range of distance in a photo that appears to be in sharp focus ... Depth of field is a creative decision and one of your most important choices when composing nature photographs. Nature Photography Photo Workshop, Nat Coalson, 2011

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Having an anti-reflective coating minimizes reflection and glare, reducing eye strain and allowing for clearer and more comfortable vision. It’s especially helpful in highly reflective conditions such as driving at night. Anti-reflective coating also reduces reflection on the surface of your lens, so people who are looking at you can see your eyes more clearly. Lenses without anti-reflective coating can create distracting and unattractive reflections.

•Unattractive reflection on the surface of the lens​•Irritating glare causes reduced vision clarity and eye strain, making it difficult to see in some conditions

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Add to any frames, with or without prescription. Compatible with single vision, Standard Progressives, and Premium Progressives.

While most lens manufacturers offer anti-reflective coatings, the performance and durability vary.  Top performers in coatings change their composition slightly for each type of lens material that they’re applied to — this is called “index matching”. It increases a stronger bond and better durability under harsh temperature conditions. Our premium C Shield coating is index-matched to the specific lens material you choose.

Depthoffieldphotography examples

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Anti-reflective lenses are designed to minimize distracting reflections and glare on the surface of the lens to improve vision and comfort.

If you set the camera's focus to the hyperfocal distance, your depth of field will extend from half of the hyperfocal distance to infinity—a much deeper depth of field. Complete Digital Photography, Ben Long, 2012.

Adding an anti-glare coating after you've already purchased your glasses is not recommended for the following reasons: It could cost more and affect quality: Since the coating application technology requires a coating to be added at the time that the lens is cut, it could cost more to apply it after purchase and you may not get the same quality. Your lenses are not factory “fresh” anymore: Once your lenses have been exposed to skin oils, the coating may not stick well, which could defeat its effectiveness and longevity. Scratches on lenses could be magnified: If there’s a scratch, applying the coating will magnify it.

Easily wipe your lenses free of dust and lint. C Shield reduces static electricity buildup on the lens surface, decreasing dust accumulation.

... the hyperfocal distance setting ... is simply a fancy term that means the distance setting at any aperture that produces the greatest depth of field. How to Use Your Camera, New York Institute of Photography, 2000.

Anti-reflective coating eliminates ghost images as well as reduces eye-fatigue from fluorescent lighting and driving at night.

• Look great with no unattractive or distracting glare on lens surface• More visual comfort in all lighting conditions for clearer, safer vision