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skip · 08-30-19, 02:48 AM

First a big thanks for making this guide

Just received my slide rule would have liked it a bit bigger, guess my old eyes cant cope so well these days.

Anyways in your range finding tutorial I have a query

I have the hairline set to 2.62 on the D scale
When I move the 1 on the C scale to line up with 1.9 on the D scale I can read under the hairline 1.39 (1390m) on the D scale.. All good

however you said when in periscope zoom to move the 4 mark on the C scale and line that up with the 1.9 on the D scale, when I do that I read 5.55 under the red hairline.

I assume that the 19mrads eg only applies to the x1 scope and in the 4x scope you would get a different mrad value which you would use with the 4 on the C scale.

Cheers

08-30-19, 02:48 AM	#9
skip Helmsman Join Date: Jul 2004 Location: Aberdeen Scotland Posts: 108 Downloads: 379 Uploads: 0	First a big thanks for making this guide Just received my slide rule would have liked it a bit bigger, guess my old eyes cant cope so well these days. Anyways in your range finding tutorial I have a query I have the hairline set to 2.62 on the D scale When I move the 1 on the C scale to line up with 1.9 on the D scale I can read under the hairline 1.39 (1390m) on the D scale.. All good however you said when in periscope zoom to move the 4 mark on the C scale and line that up with the 1.9 on the D scale, when I do that I read 5.55 under the red hairline. I assume that the 19mrads eg only applies to the x1 scope and in the 4x scope you would get a different mrad value which you would use with the 4 on the C scale. Cheers