Here's something interesting. The fish scaler has 8 serrations per 30mm, so each serration is about 3.75mm. If you hold it at arm's length then - give or take a bit of arm length variation - it will be about 2ft or 600mm from your eye. With those two measurements you can work out the apparent angular size of each serration when held at arm's length: 3.75/600 ≈ 0.006 radians = 6 milliradians or mils.A mil is a handy unit of angle measurement for range finding: it's the angular size of a 1 ft object at 1000ft (or a 1m object at 1000m etc).So 6 mils is 6ft at 1000ft: therefore if a 6ft man matches the size of of 1 serration (6 mils), he is about 1000ft away. 2 serrations = 500ft, 4 serrations = 250ft, and so on. (Assuming I've got my sums right!)Maybe it will be clearer with an amateurishly photoshopped diagram:

Quote from: shibafu on September 24, 2015, 02:03:44 PMHere's something interesting. The fish scaler has 8 serrations per 30mm, so each serration is about 3.75mm. If you hold it at arm's length then - give or take a bit of arm length variation - it will be about 2ft or 600mm from your eye. With those two measurements you can work out the apparent angular size of each serration when held at arm's length: 3.75/600 ≈ 0.006 radians = 6 milliradians or mils.A mil is a handy unit of angle measurement for range finding: it's the angular size of a 1 ft object at 1000ft (or a 1m object at 1000m etc).So 6 mils is 6ft at 1000ft: therefore if a 6ft man matches the size of of 1 serration (6 mils), he is about 1000ft away. 2 serrations = 500ft, 4 serrations = 250ft, and so on. (Assuming I've got my sums right!)Maybe it will be clearer with an amateurishly photoshopped diagram:very nice break down. the graphic does a great job of explaining it too.

Quote from: detron on September 24, 2015, 02:07:50 PMQuote from: shibafu on September 24, 2015, 02:03:44 PMHere's something interesting. The fish scaler has 8 serrations per 30mm, so each serration is about 3.75mm. If you hold it at arm's length then - give or take a bit of arm length variation - it will be about 2ft or 600mm from your eye. With those two measurements you can work out the apparent angular size of each serration when held at arm's length: 3.75/600 ≈ 0.006 radians = 6 milliradians or mils.A mil is a handy unit of angle measurement for range finding: it's the angular size of a 1 ft object at 1000ft (or a 1m object at 1000m etc).So 6 mils is 6ft at 1000ft: therefore if a 6ft man matches the size of of 1 serration (6 mils), he is about 1000ft away. 2 serrations = 500ft, 4 serrations = 250ft, and so on. (Assuming I've got my sums right!)Maybe it will be clearer with an amateurishly photoshopped diagram:very nice break down. the graphic does a great job of explaining it too.+1!!!!

I want a Swisschamp now. The whole reason I never bought one was because of the uselessness of the fish scaler

Fish Scaler rangefinder. Anyone actually did this?

Quote from: Pablo O'Brien on September 13, 2017, 09:10:51 AMFish Scaler rangefinder. Anyone actually did this?There is not much to "do", you just use the fishscaler to 'measure' the (angular) size of the object in question and do the calculation in your head.Or, shameless plug: you use one of my low-tech distance meters without doing ANY calculation at all: https://store.wndsn.com/collections/navigation-toolsSent from my ONEPLUS A3003 using Tapatalk

With this use in mind, this tool should have been standard in the Huntsman model."Fish Scaler", aka sniper's rule.Sent from my iPhone using Tapatalk

Quote from: Tired_Yeti on September 16, 2017, 06:05:25 PMWith this use in mind, this tool should have been standard in the Huntsman model."Fish Scaler", aka sniper's rule.Sent from my iPhone using TapatalkCertainly! Just a matter of what you call it. "Range Scaler" Sent from my ONEPLUS A3003 using Tapatalk