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Effect of Temperature Anti-drift lens in March Scope 10-60×56 High Master

Posted 07/03/2020

We have received inquiries regarding the effect of Temperature Anti-drift lens.

Our top lens designer, Nishikubo-san calculated with March Scope 10-60x56High Master.

 

Temperature Anti-drift Lens is incorporated in the High Master lens system of

10-60×56, 5-42×56, 4-40×52, 6-60×56 so that it will create a more stable lens system

that naturally adapts to changes in temperature to maintain focus and clarity over a wide range of conditions.
This was originally developed to meet the requirement of Field Target shooters who are sensitive to subtle temperature change.
(*Fixed 40-60x52High Master and 48x52High Master do not incorporate Temperature Anti-drift Lens
in their High Master lens system as they have less lenses and therefore less susceptible than other High Master models.)

 

Comparison with March Scope 10-60×56 High Master

(1) Before : High Master lens system without Temperature Anti-drift Lens

◆Temperature change : 35 degrees Celsius difference

   25 degrees Celsius (77 degrees Fahrenheit) → minus 10 degrees Celsius (14 degrees Fahrenheit) 

◆Change in focal point

   ∞(infinity) → 350m (about 383yard)

 

When there is a 35 degrees Celsius difference,

focal point first set at ∞(infinity) will be shifted to 350m (about 383 yard). 

 

(2) After : High Master lens system with Temperature Anti-drift Lens

◆Temperature change : 35 degrees Celsius difference

   25 degrees Celsius (77 degrees Fahrenheit) → minus 10 degrees Celsius (14 degrees Fahrenheit) 

◆Change in focal point

   ∞(infinity) → 1.3km (about 1422 yard)

 

It may be easy to see the change between infinity and 350m,

but it is very difficult for a human eye to detect the difference between infinity and 1.3km.

Some people may not feel any focal difference. 

The newly developed  High Master lens system with Temperature Anti-drift Lens

incorporated within 10-60×56, 5-42×56, 4-40×52, 6-60×56 High Master models

is way less sensitive to temperature difference than ever.

This new system will naturally adapt to changes in temperature to maintain focus and clarity over a wide range of conditions.

(*Above is an example based on calculation. When inputting different values, there will be a different result.)

 

You can also enjoy Nishikubo-san’s story in this article.

March Scopes passionately support serious shooters so that they can continually enhance their performance 😉



Written by : Mari Morita

 

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