cctvfinderDE

Knowledge

What is behind pixel density.

The groundwork the cctvfinder calculates on — the standard, the arithmetic and the figures from real data sheets. Written for anyone planning a system or checking a quotation.

New

Calculating field of view: which angle covers how much width

Two lines of arithmetic and a table: how wide a camera sees at 10, 20, 30 and 50 metres, and how many pixels per metre are left.

Fundamentals2 min read
Technology

Night vision and IR range: what the data sheet figure really says

A data sheet promises 50 metres of infrared range. What was measured is something other than what you want to see at night.

2 min
Fundamentals

IP66, IK10 and the rest: what the numbers on the housing mean

Two digits for dust and water, one number for impacts. What separates IP66 from IP67, and why higher does not always mean better.

2 min
Practice

Which camera for a driveway, a front door and a warehouse

Five worked spots with distance, height, field of view and resolution. Each one opens in the 3D view with a single click.

2 min
Practice

How far does a CCTV camera really see?

Range does not depend on price but on resolution, lens and task. With a table: which camera shows a face out to how many metres.

3 min
Practice

How high should a CCTV camera be mounted?

Mounting higher means more area and less face. What the standard says about the viewing angle, and which height suits which task.

3 min
Practice

Reading number plates: what the camera has to manage

A number plate needs several times the pixels of a face. What pixel density it takes, which angle of view fits, and why the camera has to look flat.

3 min
Planning

How many cameras do I need for my site?

The number follows from the width one camera covers at the quality you need. How to work it out instead of guessing at it.

3 min
Technology

4K or Full HD: when the higher resolution is really worth it

4K doubles the pixel density behind the same lens. When that is worth the extra, when a narrower lens does more, and what it costs.

3 min
Fundamentals

DIN EN 62676-4 explained: what the standard means for your camera plan

What Monitor, Detect, Observe, Recognise and Identify actually demand. The standard behind every serious camera plan.

3 min
Technology

Why megapixels say nothing about picture quality

Two cameras with eight megapixels can differ by a factor of four in pixel density. What counts instead, and how to work it out.

2 min
Technology

Focal length or field of view: why the data sheet is the better source

You can calculate the field of view from the focal length — in theory. A real data sheet shows why that calculation misses in practice.

2 min

Rather work it out right away?

Enter distance, mounting height and quality level — the pixel density is there at once, together with a 3D view of the scene.

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