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Illuminated reticle

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Reticle illumination is getting more common in modern rifle scopes. There are, however, two groups of illuminated reticles, meant for two different uses. In both cases, illumination of the reticle substantially increases effectiveness of such rifle scopes. Reticle illumination systems are divided to:

  • Twilight illuminated reticles
  • Daytime illuminated reticles

Twilight illumination is used for better reticle recognition in low light situations, when non-illuminated reticle would be hard to see. Such illumination systems must offer fine adjustable intensity, since over illumination of the reticle will cause problems seeing the target behind it. This is especially important when hunting in low light, where fine-tuning of illumination intensity level is one of the main parameters on which rifle scopes are judged. Preferably, such rifle scopes have only the central dot in the reticle illuminated. Some have their entire range of intensity adjustment so dim that illumination cannot be seen during the daytime. 

Daytime illumination of reticle serves a different purpose than twilight illumination, and in such rifle scopes, high intensity levels are a necessity. In such rifle scopes, the illumination of the reticle is meant for rapid target acquisition, since a bright red dot is the best possible aiming point. Shooters’ eyes are instinctively drawn to a bright red dot in the center of the field of view. Such strong illumination is feasible only in rifle scopes with magnification lower than 1.5x or ideally 1.0x. Such wide-angle rifle scopes with a real 1.0x magnification and daytime bright illumination of the reticle can even be used with both eyes open, similar to reflex/red dot sights.

Since almost all illuminated reticles are battery powered, an automatic switch off is a usable feature that can significantly prolong battery life and operation time of such systems. Most advance reticle illumination systems even include a motion sensor that turns off the illumination (and saves battery life), when the scope is in non-shooting position (90 degrees sideways or in vertical position).

Video presentation of Illuminated reticle

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Definition

Field target is an outdoor competition where competitors use air guns to shoot at steel targets 9–50 m away. The competitors shoot from various positions – prone, kneeling, sitting, and standing.

In field target competitions, steel targets with a hole in the face plate are used. They are usually animal shaped. The hole is called the kill zone – if the shooter hits this area (with a certain force), the target trips over thanks to the paddle installed behind the hole. If the shooter hits the face plate, the target does not fall.

The shooters are not given the information on the distance to the target. It is up to them to determine it with the help of their riflescope (more information can be found below). No laser rangefinders are allowed at the competitions.

Schmidt & Bender 12.5-50x56 Field Target II (silver)

Schmidt & Bender 12.5-50x56 Field Target II (silver)

General features

An adjustable parallax is the most important feature of a riflescope designed for field target competitions. To cover the distances on which the targets are put, it must be settable from 7 m onwards.

Riflescopes designed for field target shooting boast high magnification power which is important for distance evaluation. Only at high magnification can the user successfully estimate the distance with the help of the parallax.

Tactical turrets are common – it is important for the user to have the elevation and windage adjustments at hand as POI adjustment with the help of turrets is essential in the field target competitions.

Generally speaking, most features of these riflescopes are identical to the ones on F-class riflescopes.

Why do shooters attach big wheels on the parallax turret?

In field target shooting, the competitor estimates the distance to the target with the help of an adjustable parallax.

Participants mark their scope with distance marks – when the image is in focus, the shooter knows the distance to the target. This is done only once for each riflescope before participating in competitions by setting the target at various distances with the help of a long tape measure or a laser rangefinder. Many shooters use a marked tape to write the distances down on the parallax of the riflescope.

A sidewheel makes this procedure easier for two reasons. With it, you can set the parallax much more precisely. Furthermore, you are provided with the surface for applying the marked tape. Most riflescopes with an adjustable parallax have the parallax knob on the side, hence the name ‘sidewheel’. Kahles K1050i FT 10–50x56, for example, has the parallax knob on top, at the base of the elevation turret – in this instance, the term ‘topwheel’ is much more suitable. A universal term used for this accessory is ‘parallax wheel’.

Certain field target riflescopes feature additional equipment such as bubble level to provide the most accurate distance readings.

Schmidt & Bender 12.5-50x56 Field Target II's sidewheel

Schmidt & Bender 12.5-50x56 Field Target II's sidewheel

Does temperature affect the accuracy of distance reading?

Field target competitions require the shooter to be extremely accurate. When competing in high temperatures, the accuracy of the riflescope can be compromised. For this reason, many optics manufacturers offer silver field target riflescopes. These do not heat up in the sun as much as classic, black riflescopes.

Schmidt & Bender 12.5-50x56 Field Target II's sidewheel

Schmidt & Bender 12.5-50x56 Field Target II's sidewheel

Can F-class optics be used for this type of competition?

F-class riflescopes are identical to field target riflescopes feature-wise which is why an F-class riflescope can be used for field target shooting. At the beginning this was the only way – it took a while for the manufacturers to introduce riflescopes designed specifically for field target. The development of these riflescopes was based on the features of F-class riflescopes.

Can this type of riflescopes be used for F-class competitions?

This is possible though not ideal as parallax on certain field target riflescopes cannot be set beyond 100 m. The reticles used in field target are not best-suited for the F-class shooting.

Schmidt & Bender 12.5-50x56 Field Target II's bubble level

Schmidt & Bender 12.5-50x56 Field Target II's bubble level

short presentation of optics is available here