Posted: 10/15/2014 9:23:46 PM EDT
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I just want to verify that I'm calculating the overall magnification on a thermal scope accurately.
In particular I'm looking at the IR Hunter MK II with the 19mm lens. The spec sheet says it's 1.5x optical. I've also heard that the 4x digital zoom setting is very functional for hogs. So my thinking is I get 1.5x with the optical and that gets magnified 4x with the digital, which would give an overall magnification of 6x. Is this correct? I currently use a NV scope with 4x so if my thinking is correct then the thermal, on 4x digital, would be 50% greater magnification (6x) than my NV scope. Or conversely, I could run the thermal a little above 2.5x digital and get the same magnification as my NV. Am I thinking about this right? Thanks! |
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The PDF would not send but here it is that better explains the answer.
The most important thing to do is use the Field of View (FOV) for a comparison as all companies have different ideas of what 1x is. The IR HUNTER MKII is available only as a 640x480 resolution so to compare to a 320x240 it would be the 2x zoom. Also a D740 NV weapon sight has a 10° FOV and a D760 is at 8° FOV which you can see below of where it would compare to the IR HUNTER models. Please note that your resolution breaks down as you increase digital zoom magnification. Model 1x 2x zoom 4x zoom 8x zoom IR HUNTER MKII-20 22° 11° 5.5° 2.8° IR HUNTER MKII-20 12.5° 6.3° 3.1° 1.6° 
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