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Fixed power Scopes and Rifle scopes

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Introduction of Fixed Power scope

Fixed power scopes are becoming rare these days since the majority of manufacturers moved forward and started producing riflescopes with variable magnification. 

Primary Arms CLX6 6x32 SFP

Primary Arms CLX6 6x32: Fixed magnification riflescope (fixed power rifle scopes)

Advantages of Fixed magnification scope

Nevertheless, fixed power rifle scopes still have some distinct advantages.

  • Due to the small number of lenses used in fixed power rifle scopes construction, this riflescope tends to be brighter than its variable magnification counterparts are. Normally, such a comparison is only valid if both riflescopes have glass and coating of the same quality.
  • The second advantage is that fixed power - scopes are easy to use. There is no magnification setting, no parallax adjustment, or any other distractions before taking the shot. Just aim and shoot. 

For some users, these two reasons are more important than the lack of field of view compared to variable power riflescopes.

Swampfox Patriot 4-16x44

Swampfox Patriot 4-16x44 Riflescope with fixed magnification (fixed power rifle scopes)

General information

General characteristics of fixed power rifle scopes are:

  • Fixed powered magnification
  • 1 inch, 30mm, or rail for mounting on rifles
  • Parallax set to 100 meters
  • Illuminated reticle or non-illuminated reticle
  • 42mm, 50mm, or 56mm lenses in fixed power rifle scopes

 

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General features of Crossbow Scope

These riflescopes are designed for crossbow use.

The crossbow scope is compact and light, with a 1-inch (25.4mm) tube and an objective lens diameter of 32–36 mm.

Magnification on Crossbow optics and scope

The magnification on Crossbow Scope is either

If it is variable, the maximum magnification usually does not surpass 8x.

Parallax and field of view on the Crossbow Scopes

The parallax on the crossbow scope is fixed, mostly at around 30 m of distance. The eye-relief is suited for crossbow use (around 70 mm). The Minimal Field of view on crossbow scope is around 8-10m/100m, and the maximal field of view is 28-32m/100m.  

crossbow scope

A crossbow with a mounted Crossbow scope (source: sightmark.com)

The reticle on the hunting crossbow scope

The reticle on the crossbow scope consists of dots or lines for the arrow drop (sometimes a combination of both is used).

It is important to know that an arrow is subjected to a huge drop compared to a bullet, even at close distances.

Most commonly, a great portion of the reticle on crossbow scopes is illuminated.

Mounting on a scope

When mounting optics on the crossbows, it is important to know that the mounting platform (Picatinny rail) is located above the flight groove of the crossbows.

A crossbow scope is attached to the rail with two Picatinny rings. Most crossbow users shoot with the help of scope as it significantly improves the accuracy. 

mounting on a crossbow scope

Crossbow Scope on a Crossbow

A short presentation of the Crossbow Scope is available here.

Best Slideshare Presentation of Popular Crossbow optics, Scopes, and Crossbows