These rangefinders are designed for human targets. With the horizontal lines placed at the shoulders of a human silhouette to estimate the distance to the target. Rangefinding reticles can be very complicated when you compare them to simple reticles, but they are essential for anyone hunting without a spotter to estimate distances for them. You’re more likely to find these reticles in older military-style scopes.

Originally, reticles were made from real hair or spiderweb, and the name “crosshair” stuck. Although optics can be traced back hundreds of years, the first practical rifle optic was invented between 1835 and 1840. After 1850, several U.S. manufacturers produced the sights that would become standard equipment for Civil War sharpshooters, basically the country’s first snipers.

Most offices in the USA are over-lit based on ergonomic recommendations. If the light on the workstation is dimmer than the surrounding ambient light, it can be difficult to work. Normal task lighting is recommended to be around 540 Lux, but many offices are illuminated to 990 Lux, which results in eyestrain.

These negative health effects can contribute a reduction in a person’s working hours. They can also negatively affect productivity and cause a lack of precision when carrying out tasks.

A Mil-Dot reticle features a duplex crosshair with an equally spaced pattern of small dots on the axis for range estimation.

The crosshair should be sufficient unless you’re a deer hunter making long-distance shots. It offers a clear field of view, allowing the hunter to get on the target quickly. Be aware that even though the crosshairs are accurate and easy to use, the thin wires can be lost among the brush, so they work better in the open fields.

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The curved line on the lower left quadrant with the numbers (10..2) can also be used to measure the distance to the target, using a human of average height. The shooter aligns the scope so that the person’s feet touch the bottom horizontal line and then sees which marking the person’s head touches.

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Apart from the minimum standards, what should you look for in an ergonomic task light? The best task light for an office is usually the most versatile and flexible light you can find. An LED task light like the Rana task lamp checks all the boxes – flexible design, adjustable light intensity, and easily adjustable positioning. Add a Rana LED light to your desk whenever you need an instant boost for your ergonomic workstation design.

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A reticle is a set of fine lines or fibers inside an optical device. The markings help you with aiming, measuring, or pointing. When you look through a rifle scope, the reticle is the cross, dot, or pattern that you see.

Even though #4 differs little from #1, it is the more popular of the two today, providing better ergonomics for accurate aiming. Neither of these reticles is ideal for small targets, but they would work when hunting dangerous game in Africa, for instance. These German-style grids are often illuminated.

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Scientists use light meters and other technical equipment to measure illuminance, luminance, contrast, and reflectance. But you don’t have to be a scientist to make a big difference in office lighting. In point of fact, people tend to be pretty good sensors when it comes to making lighting decisions. According to an ACEE study on lighting, if the light in your home office seems insufficient to you – it probably is. So if you find that your eyes are tired or your head is aching at the end of the day, that’s all the information you need to start looking for a solution.

OSHA also develops product recommendations for computer workstations, including office lighting products. As part of the OSHA purchasing guide for computer workstations, the checklist for desk lighting recommends:

What is the best lighting for an office? The answer depends on the person, the office environment, and the type of work.

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Bullet Drop Compensator (BDC) reticles give the shooter an estimate of how far the bullet will drop at a certain range. They normally feature a center crosshair with markings below for compensation. If the center crosshair is zeroed at 100 yards, the markings below the crosshair become the bullet’s trajectory at 200, 300, or more yards and beyond. More advanced BDC reticles also feature markings to adjust for windage. We commonly refer to these advanced reticles as “trees,” or Christmas trees.”  The BDC style is popular for hunting or tactical applications.

Although the standard crosshair reticle was effective, shooters and equipment evolved to the point that they needed customizable reticles. The modern rifle optics industry was born, and mounted optics became more of a standard feature. While there are too many reticle models to provide an exhaustive list, we’ll look at several of the most popular types, beginning with the one that started it all.

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The best office lighting includes lower levels of indirect lighting coupled with a higher level of direct lighting such as task lights. More is not always better when it comes to ergonomic office lighting; instead, the best selection is whatever matches the rest of the environment.

The prime example of an SVD-type reticle is the one you’ll find in the PSO-1 scope. It was designed for the Russian Dragunov SVD sniper rifle as a telescopic sight for military activities. The SVD-type is a rangefinder design created to be used in distance-to-target estimations. As with most modern optics, it includes markings for bullet drop and wind drift compensation.

A minimum amount of general lighting is required for any office setting, taking into account the fact that most workers will use computers. But, for additional tasks like reading and note taking, you may need additional task lighting to avoid eye strain when switching back and forth from the brightness of a screen to the desk surface, which is relatively dark. Monitors generate light, and paper reflects light. In fact, reading paper documents requires at least 4-5 times more light than reading a computer monitor.

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The SVD-Type features a scale on the left to determine the distance to the target and is commonly found in the PSO-1 scope.

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The Milliradian Dot (Mil-Dot) reticle works well for those shooting long distances, especially when it will be a one-time shot on the target. This reticle provides the shooter with enough information to make that shot count.

Many manufacturers offer multiple reticle options for the same scope. As a result, you’ll need to decide which options work best for your needs. No matter which reticle you choose, you’ll now have a better understanding of the terminology. Different reticles are like different tools, you’ll need to select the right one for your intended application. For example, a circle reticle is great for hunting turkey, but may not be the best choice for far-away deer.

The circle plex reticle is a variation of the circle dot, where a crosshair resides in the center of a circle. The crosshair generally is in the shape of a cross and does not extend past the boundaries of the circle inside of the reticle. In some circle plex versions, there is a dot at the center of the cross. This variation is popular in tactical style scopes and optics.

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Today’s rangefinding reticles assist the shooter in determining the distance to the target. Some of these reticles have a scale in the lower part of the sight picture. While others have horizontal lines of different widths below the crosshair. Their purpose is to give the shooter a single magnification to sight in targets and estimate their distance.

The circle reticle is a standard crosshair reticle with a dot in the center or a circle around the center of the crosshair. The dot and circle draw the shooter’s eye to the center of the reticle for faster target acquisition and greater precision. Circle dot reticles are favored for competition shooting and hunting fast-moving game, such as rabbits, troublesome varmints, or hogs. This type of reticle typically works better for turkey hunting as they have a crosshair inside of a larger circle.

Glare involves bright light that affects how you see the object you want to concentrate on. Glare can be caused by a poorly positioned light, a bulb that is overly bright, sunlight, or reflections from shiny surfaces. Fluorescent lights also cast a “yellow” light that is not absorbed into white surfaces like paper or white work surfaces. This light is in turn reflected back to the user.

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These reticle styles were created in Germany. German snipers used them in both world wars, although we don’t recommend them for long-distance shooting today. There are no crosshairs, only a main post and side posts to frame the target. German reticles are an excellent option for low-powered scopes designed for hunting big game at close range where you want to point and shoot very quickly.

At the very least, you should have a general understanding of reticle types. Once you know the different types, you’ll be able to easily match the rifle scope options to your hunting or shooting activity. Here’s what you need to know:

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When it comes to office ergonomics, we often think of setting up a workstation with just the right ergonomic office chair or height adjustable standing desk. Comparatively little thought is given to ergonomic lighting for office tasks, even though ambient lighting and office task lighting can be just as important as furniture for maintaining a healthy office environment.

Crosshair variations continue to be the most popular reticle, a favorite among the competition, and target shooters for their precise aiming point.

Take your time and do research when selecting a reticle. Don’t be afraid to get hands-on and try several different options out at the range. You may find more than one option that suits your needs. Likewise, for many gun owners, knowing what you don’t want can be just as important. Although it can be confusing, stick with it, you’ll find the perfect option to make your setup complete.

A popular variation of the standard crosshair is the duplex. Pillars twice the thickness of the crosshairs reach three-quarters of the way toward the center of the reticle. The idea behind the duplex reticle is that the shooter’s eye naturally falls to the center of the target.

Sometimes called the original reticle or the basic reticle, the crosshair reticle provides a central aiming point with intersecting wires: a vertical (windage) and a horizontal (elevation), both of which are the same thickness.

These reliable measurements can calculate the range if the target size is known, and they can aid in compensating for wind drift. Keep in mind that all this information can be a bit too much for the average shooter to absorb. However, if you’re willing to learn the details of the Mil-Dot and how to use it effectively, you’ll have a useful reticle for several applications.

Although a bit complex for novice shooters, the reticle’s capabilities and flexibility allow the user to focus on four areas:

Most of us notice poor office lighting when we can’t see well. Over time, people may even develop Computer Vision Syndrome (CVS), a group of vision related problems that results from prolonged use of computers and other screens. The problems are often exacerbated by fluorescent lights that are used for overhead ambient lighting.

When the light changes rapidly – even imperceptibly – it can be distracting and can cause headaches. Magnetic ballast fluorescent lights “flicker” noticeably when the bulb is going bad. However, even when we do not notice the flicker, it is still happening and our eyes and brain are affected.

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Many shooters select a rifle scope by researching its magnification, lens system, and physical specs. But it’s also important to consider the scope’s reticle in the decision-making process. Admittedly, it can be the most confusing part of choosing a scope. There are many types of reticles available on the market. Unless you’re a seasoned professional shooter, the subtle differences might be difficult to navigate.

ACSS stands for Advanced Combined Sighting System.  It has numerous features for combat targeting accuracy at longer distances without the loss of speed. The horseshoe at the center is designed for close-quarters combat. While the center dot is meant to be zeroed at 100 yards on your weapon. The stepped ladder below the horseshoe provides users with a guide to adjust for distance and windage.

By increasing the amount of light delivered to your desk surface, paper documents are better illuminated. An ergonomic task light should always be adjustable. That way you can decide where its light falls across your desk. You can also save energy and reduce the strain on your eyes.

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The PSO-1 reticle’s “floating” elements assist in range estimation, bullet drop, and drift compensation. Despite its age, it is illuminated by battery power. The top chevron (^) mark is the main aiming mark. The horizontal marks (10…10) help adjust for windage and lead moving targets.

OSHA considers lighting part of the workstation environment, and recommends some minimum standards. According to OSHA’s ergonomic workstation checklist, you should ensure that “Lighting levels are adjustable for differing tasks. Brighter task lights should be provided for paperwork and lower lighting should be used for general computer work.”