Print Page | Close Window

Leupold RED

Printed From: OpticsTalk by SWFA, Inc.
Category: Scopes
Forum Name: Tactical Scopes
Forum Description: Police and military tools of the trade
URL: http://www.opticstalk.com/forum_posts.asp?TID=36196
Printed Date: March/28/2024 at 03:36
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com


Topic: Leupold RED
Posted By: sturmgewehr
Subject: Leupold RED
Date Posted: March/19/2013 at 19:43
Anyone know why Leupold uses red for reticle illumination? I have scope 67970. It is a great
scope but I would have preferred a green illumination. I knew this when I bought it and would
not have changed my decision but was just wondering if anyone had a thought.  Pete



Replies:
Posted By: cheaptrick
Date Posted: March/19/2013 at 19:49
Welcome to Optics Talk. 




-------------
If at first you don't secede...try..try again.


Posted By: Bitterroot Bulls
Date Posted: March/19/2013 at 20:12
IDK, but maybe it has to do with some colorblind people having trouble with green?

-------------
-Matt


Posted By: 3_tens
Date Posted: March/19/2013 at 21:02
The human eye dilates less to red light than it will to green light. This is why red lights are used to acclimate the eyes for darkness. The illuminated scopes are to see the reticle in low light, where you do not want to harm your night vision.


-------------
Folks ain't got a sense of humor no more. They don't laugh they just get sore.

Need to follow the rules. Just hard to determine which set of rules to follow
Now the rules have changed again.


Posted By: Kickboxer
Date Posted: March/19/2013 at 21:44
Originally posted by 3_tens 3_tens wrote:

The human eye dilates less to red light than it will to green light. This is why red lights are used to acclimate the eyes for darkness. The illuminated scopes are to see the reticle in low light, where you do not want to harm your night vision.

Correct answer...


-------------
Opinion,untempered by fact,is ignorance.

There are some who do not fear death... for they are more afraid of not really living


Posted By: koshkin
Date Posted: March/20/2013 at 02:29
Originally posted by 3_tens 3_tens wrote:

The human eye dilates less to red light than it will to green light. This is why red lights are used to acclimate the eyes for darkness. The illuminated scopes are to see the reticle in low light, where you do not want to harm your night vision.

Correct conclusion.  Not so sure about the whole eye dilation argument.

I thing what you were trying to say was that since light sensitive cells in your eye that are primarily responsible for low light vision (i.e. rods) have low sensitivity to red, presence of red light is less likely to screw up your night vision by making your eye pupil contract.  You want your eye pupils dilated to see in the dark.

As a practical matter, red makes for pretty good reticle illumination for low light situations since it has less effect on your night vision and since most scattered light available at night is in the blue-green part of the spectrum.  Hence, a faintly illuminated red reticle still stands out nicely.

If you decide to use a green illuminated reticle in low light, you have to be absolutely sure that the intensity is not too bright or you will see nothing, but the reticle in short order.

ILya


-------------
http://www.darklordofoptics.com - www.darklordofoptics.com
https://rumble.com/c/DLO - Rumble Video Channel


Posted By: RifleDude
Date Posted: March/20/2013 at 10:53
The other reason for red, I think, is simply that there's very few things in nature that are bright red, so red will always contrast nicely against just about any background. Some people will always prefer different colors, but most mfgs of illuminated scopes use red. I kinda like the amber/orange illumination that Swarovski uses in their Z6i series scopes. I think it really contrasts nicely without being overpowering.

-------------
Ted


Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle.



Print Page | Close Window

Forum Software by Web Wiz Forums® version 12.01 - http://www.webwizforums.com
Copyright ©2001-2018 Web Wiz Ltd. - https://www.webwiz.net