Post by leadsquirter on Jul 23, 2007 9:36:42 GMT -5
We had an excellent Highpower match yesterday at the KRGC (July 22) with a total of 24 shooters. The weather was perfect with very bright conditions. I picked up the following off the NationalMatch.com website forum. I think this is the most easy to understand explaination of how light affects your sights and target.
A guy was asking why he shoots higher in bright light vs. low light conditions.
With a rear aperture and a front sight post, you will always shoot high/low as the light goes up/down. This is because your eye is using brightness as a judge of how big the gap is between your front sight post and your target. As illumination changes the brightness of the target, you will fool your eye. A thin bright gap has the same brightness as a wider dim gap. So you set your sights correctly in the day to be correct when you see a thin bright gap. Then the light dims, and your eye holds a bigger gap which it thinks is the same brightness.
Unfortunately, this relationship between brightness and shooting high/low is something you cannot fix with a front sight post. If you really want to get rid of it, you need to move to a globe front sight, which moves you to a match rifle.
A guy was asking why he shoots higher in bright light vs. low light conditions.
With a rear aperture and a front sight post, you will always shoot high/low as the light goes up/down. This is because your eye is using brightness as a judge of how big the gap is between your front sight post and your target. As illumination changes the brightness of the target, you will fool your eye. A thin bright gap has the same brightness as a wider dim gap. So you set your sights correctly in the day to be correct when you see a thin bright gap. Then the light dims, and your eye holds a bigger gap which it thinks is the same brightness.
Unfortunately, this relationship between brightness and shooting high/low is something you cannot fix with a front sight post. If you really want to get rid of it, you need to move to a globe front sight, which moves you to a match rifle.