[MikeT125]

anyone?

 

[arrow head 147]

When you slide the sight extension in or out it can help to match the peep to the sight aperature.
Conventional wisdom also says that a longer sight radius will give you an advantage like comparing a pistol to a rifle.I personaly find this example to be not to an apples to apples comparison.Even without an extension the distance from peep to sight even on a bowhunter set up is going to be near 30 in.
If you have a magnified lense,The further out you slide the scope the greater the magnification.
To much magnification will give you a very shakey sight picture.
It's all a balencing act and there will be a lot of personal preference.
There are somethings to think about.

 

[glass3222]

When you slide the sight extension in or out it can help to match the peep to the sight aperature.
Conventional wisdom also says that a longer sight radius will give you an advantage like comparing a pistol to a rifle.I personaly find this example to be not to an apples to apples comparison.Even without an extension the distance from peep to sight even on a bowhunter set up is going to be near 30 in.
If you have a magnified lense,The further out you slide the scope the greater the magnification.
To much magnification will give you a very shakey sight picture.
It's all a balencing act and there will be a lot of personal preference.
There are somethings to think about.

To add to what arrow head said:

The farther away from the sight is from the bow, the easier to fine tune adjustments. For example, a small adjustment with the sight close to the riser may move the arrow impact 1 inch, while the same adjustment with the sight farther way from the riser may change impact 1/2 inch.

That being said, depending on what class you shoot, you may be limited on what extension you can use. Here in PA, bowhunter classes limit you to a max of 6 inch extension. As well as personal preference.

As far as the hieghts, (400, 4 in or 550, 5.5 in), it depends on what distances you are going to shoot, and speed of you bow. If you are going to shoot 90 meters, you may not be able to get all of your yardage settings on a 4 in bar.