Manic Industries Australia
This unit is best suited for use with variable scopes with Adjustable Objective or Side Focus adjustable parallax, but can be used on non-AO variables and fixed-power scopes with a few, small limitations. Any sized scope can be used and the device can easily be swapped between rifles fitted with different scopes by changing the screw-on scope adaptor (which can be supplied in various sizes).
Variable AO and SF scopes
With the device fitted, the image viewed can be zoomed in or out by using the power ring of the scope. The amount of zoom available is dictated by the magnification of the power ring of the scope. Once the desired magnification is reached, the image can be focussed by using the AO or SF of the scope until a clear image is achieved. This will work at any magnification and at any range (except for ranges closer than the lowest AO setting of the scope). Scopes with a wide magnification range may exhibit slight darkening at the upper end of magnification, but this can somewhat be overcome by increasing or focusing the IR light (depending on the torch being used) or by decreasing the selected magnification slightly to suit conditions. The video below was taken using an Olivon 3-12x50 AO scope. A comparison between the 2 torches using this scope is also shown.
Variable non-AO scopes
Unlike AO scopes, the parallax on variable non-AO scopes is preset by the manufacturer. This means that the image created by the device, when fitted on these types of scopes, will not be able to be zoomed in and out over the entire magnification range of the scope without the image losing focus. The image will be at its clearest only at a small part of the power range. The particular magnification setting and the amount of zoom either side of this that will give a focused image will be totally dependent on the individual scope being used. On an average 3-9x scope, this is normally around the 4x mark with an average zoom range around 3-6x. This is a very rough average and will vary from scope to scope. The video below was taken using a Leupold VX3 3.5-10x50 scope (non-AO). A comparison between the 2 torches using this scope is also shown.
Fixed power scopes
With fixed power scopes, the parallax is again set by the manufacturer. Their performance, when used with this device, differs to that of variable non-AO and parallax adjustable scopes. With fixed power scopes, the image obtained will only be in focus within certain distances and will be totally dependent on the individual scope being used and its parallax setting. For an average 6x scope, the useable range where the image is in focus is normally between 60-150m. Again, this is a rough average and will vary from scope to scope and the fixed magnification being used. The video below was taken using an early Bushnell 6x32 scope. A comparison between the 2 torches using this scope is also shown.