Lenses (91)

Displaying 'Lenses' tags 51 - 75 of 91 in total

Lens Selection Recommendations

Selecting the right lens can be confusing and tough, especially because lenses are often integrated into cameras, severely restricting flexibility to mix and match the right lens feature sets. In this tutorial, we examine 7 key criteria in selecti...

By John Honovich - about 6 years ago

Iris Vs Shutter Speed

Surveillance cameras must deal with wide variations of lighting -- automatically and continuously. It can be 10,000+ lux during the day and under 1 lux at night. In a few seconds, lighting can drop dramatically, for example, if the sun goes behind...

By John Honovich - about 6 years ago

Thermal Camera Tutorial

Thermal cameras can deliver where visible conventional cameras fail, but they come with significant tradeoffs which must be considered. In this tutorial, we cover these topics, including: Thermal image detail Detection, no recognition Availab...

By Ethan Ace - about 6 years ago

Documenting Camera Layout

Documenting camera layouts can be important: Ensuring that you have a realistic field of view that covers the area you want with the sufficient coverage Understanding what gaps in coverage you might have and where there are overlaps Selecting...

By Ethan Ace - over 6 years ago

360 / Panoramic Cameras Selection

A number of important considerations should be factored in when selecting Panoramic / 360 degree cameras. Key ones include: (1) limited VMS support, (2) low light issues, (3) Wide Dynamic Range problems, (4) pixel density limitations and (5) mount...

By John Honovich - over 6 years ago

Minidomes vs Full Size Dome Tradeoffs

Not too long ago, dome cameras were huge, fitting a full-size box camera into a large protective bubble. The move to "minidomes" changed that, cutting their size in half or smaller. Now, the definition of "mini" has changed again, with even smalle...

By Ethan Ace - over 6 years ago

Sentry360 FullSight 180 Cameras Examined

180 and 360 degree cameras continue to increase in popularity, with a number of manufacturers releasing new product in the past year. Sentry360, best known for their 360º line, has now announced two models of 180º cameras to compliment them. In th...

By Ethan Ace - over 6 years ago

Axis Goes Covert (P12 Pinhole MP)

Try finding an IP pinhole camera or a MP pinhole camera. Even in 2012, it is nearly impossible and the choice is essentially analog or nothing. Attempting to solve this problem is Axis's new P12 release. Of course, Axis is neither alone nor first....

By Ethan Ace - over 6 years ago

Pan/Tilt Camera Selection Guide

Multiple styles of PTZ are available, though little clear-cut guidance on which is best for a given application is available, making camera selection difficult for inexperienced users. In this note, we overview the three main types of PTZ cameras:...

By Ethan Ace - almost 7 years ago

Sentry360's 14MP Camera

While best known for panoramic cameras, Sentry360 also offers a line of multi-megapixel fixed cameras with up to 14MP resolution. This is rare in the industry, with Arecont and Avigilon being the most notable products currently in this space. In t...

By Ethan Ace - about 7 years ago

Sentry 360 Panoramic Cameras

In this update, we will examine the panoramic camera offerings of Sentry360. This camera line differs from competitors in key ways, with a broader line, increased resolution, and wider VMS support. We will look at these features, pricing, and how ...

By Ethan Ace - about 7 years ago

Directory of Lens Tests

This directory collects our lens test reports and related lens information. Lens Tests HD Lens Shootout - Our most popular and 'flagship' lens test pits a number of lens manufacturers (like Fujinon, Tamron, Computar, etc.) to see which one deliv...

By John Honovich - about 7 years ago

Varifocal vs. Fixed Lens Integrator Preference 2011

UPDATE: See newer results from 2017 here. When selecting lenses for surveillance cameras, there are two fundamental options: varifocal and fixed focal length. Varifocal lenses allow the field of view to be adjusted within a range (e.g. 3-8mm, 9-2...

By Ethan Ace - about 7 years ago

Raytec Vario Illuminators Examined

Raytec has announced a new line of both white light and infrared illuminators, named Vario, which provides novel features not normally seen in the IR illuminator space. In this update, we'll examine the features of the Vario line, and how it compa...

By Ethan Ace - over 7 years ago

Auto Back Focus (ABF) Preference Statistics

Auto back focus has become a more common feature in the past couple of years, with many, if not most, new IP camera offerings containing this capability. Manufacturers claim that auto back focus reduces installation time and makes focusing cameras...

By Ethan Ace - over 7 years ago

Axis P5544 Panoramic PTZ Camera Examined

In this note, we examine the Axis P5544, Axis's first panoramic camera and one of the most novel offerings in the market - combining both optical/mechanical PTZ functionality and panoramic / 360 degree imaging. The big question we focus on inside ...

By John Honovich - over 7 years ago

Pentax Plus Megapixel Lens Test

Last month, we released the first ever Megapixel lens test where we did a shootout between 5 leading surveillance lens manufacturers - Computar, Evetar, Fujinon, Tamron and Tuss. Member feedback was very encouraging and the lessons learned in imag...

By John Honovich - over 7 years ago

Ubiquiti Super Low Cost Surveillance

Wireless manufacturer Ubiquiti has been extremely successful at bringing low cost products to the wireless networking market. They are now attempting to do the same in surveillance with their upcoming AirVision VMS and AirCam line of cameras. In t...

By John Honovich - over 7 years ago

HD Lens Shootout

Conventional wisdom says that lenses make a big difference in image quality but the question remains: "How much of a difference?" With the shift to megapixel cameras increasing demands for higher quality lenses, this question has gained even great...

By Benros Emata - over 7 years ago

ImmerVision's 5MP 360 Lens Examined

Panoramic lens designer ImmerVision has announced a new 5MP version of their IMV series of lenses. In this update, we will examine whether this nearly 4x increase in resolution over their current lenses may help to alleviate recurring issues with ...

By Ethan Ace - over 7 years ago

New Surveillance Products Directory Fall 2011

This report provides a summary of key announcements and news being made related to or around the ASIS 2011 show.For each product or change, where applicable, we provide a link to the manufacturer's announcement on their site and then a link to our...

By John Honovich - over 7 years ago

ACTi's 4MP Price/Performance Analysis

Over the past year, Taiwanese megapixel manufacturer ACTi released a line of four-megapixel cameras, while discontinuing most of the standard definition cameras in their line. This was an interesting move, but one that had the potential to affect ...

By Ethan Ace - over 7 years ago

New Surveillance Products Review June 2011

In this report, we provide in depth coverage of new surveillance product releases announced in May and June 2011. Below are the products we are reviewing including a link to each company's announcement: Axis Lightfinder / Q1602 Axis Low Cost Encod...

By John Honovich - almost 8 years ago

Lens Selection Standards for Camera Testing

With surveillance cameras, deciding what lenses to use for testing can be a difficult decision. We see two basic yet fundamentally opposing approaches: Use the same lens on every camera tested: This approach ensures that no camera has an unfair le...

By John Honovich - almost 8 years ago

Analog vs HD Night Shootout

The whole point of megapixel is better image quality but what if megapixel was actually worse than analog at night? In the consumer world, maybe this is acceptable but in surveillance, most cameras need to 'see' 24 / 7. [WARNING: This report is O...

By Benros Emata - almost 8 years ago

Displaying 'Lenses' tags 51 - 75 of 91 in total