Monday 10 March 2014

MSR Reticle in Kahles K624i

Taking decent photos through a high power rifle scope is insanely difficult. Finnaccuracy have posted some taken through Kahles and Schmidt & Bender scopes and my hat goes off to them for how well done they are. The link goes to the S&B page - scroll down to see the reticle pics. There's more pictures on the MSR-Kahles page.

Here's a series of photos I took yesterday. The clarity is not very good, but they do show the reticle illumination. The features of the MSR reticle can also be seen.

Please keep in mind that the real view through the real scope is vastly better than photographed here. This reticle through this scope is simply a joy to use. :-) I was seeing individual strands of spider web on the rooftop air-conditioner, glistening in the sun, this morning.

The roof top is 230 meters away. The scope is set on 8x magnification for the photos below. The camera lens is picking up only part of the view through the scope.

This first picture is complete rubbish but sets the scene for the photos below.

MSR Reticle in Kahles K624i


After having so much trouble with the first shot I took the scope off the rifle (thank you Double Square Mount!) and set everything up again. This is a bit more useful.

MSR Reticle in Kahles K624i





The next shot shows the reticle illumination turned up high. It's very glary outside, but against a neutral background the illumination is very effective. The highest setting causes the illumination to look thicker than the black crosshair, which is useful at low magnification. 

MSR Reticle in Kahles K624i

And next, I've turned the illumination down. The central dot is just becoming distinct.
As mentioned in the previous post - measuring distances is a snap if an object of known size is present in the scene. The width of a house brick is 230mm; if it subtends 1 milliradian then 230mm ÷ 1 mil = 230 meters. A roof tile on the next house is 295mm wide. It subtends 1.2 milliradian. The distance is 295mm ÷ 1.2 mil = 245 meters.

MSR Reticle in Kahles K624i


Next, the illumination is turned down further. The red line is now close in thickness to the black cross hair lines. I'm going to keep trying to get better photos through the scopes. I think it's a matter of finding the right distance and focal length. My kids will probably hold their phones up and get perfect shots first time. :-)

MSR Reticle in Kahles K624i




Here is the reticle diagram for the Kahles K624i. I believe Kahles refer to this as their Gen II version. Click the photo to see more detail. Note that the subtension of the fine cross hair is 0.4 cm @ 100m, which is in-between the measurements for the MSR reticle used by S&B and Steiner (0.5 cm @ 100m) and the P4L-Fine used by S&B in their PM II scopes (0.35 cm @ 100m).









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Regards, Rick.

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