Seeing the contact point on the object ball.

[bbb]

With fractional aiming, adjustments must be made on nearly every shot. Fractions only clearly define a few cut angles (full, 3/4, 1/2, 1/4…).

pj
chgo

Actually, it’s not difficult to have aiming points for the in-between cut angles so actually you can have eight instead of four targets
Still like all aiming systems as you say PJ there is a subjective element

 

[straightline]

Actually, it’s not difficult to have aiming points for the in-between cut angles so actually you can have eight instead of four targets
Still like all aiming systems as you say PJ there is a subjective element

Why limit yourself to discernible fractions? In dialing those oddball hits, you'd have to cut into your control range just to fudge the inbetweeners.
Conversely, with geometric alignment, you can be centralized on every shot and adjust through the full range of the shot.

 

[bbb]

Why limit yourself to discernible fractions? In dialing those oddball hits, you'd have to cut into your control range just to fudge the inbetweeners.
Conversely, with geometric alignment, you can be centralized on every shot and adjust through the full range of the shot.

Could you go through the steps of geometric alignment one more time, please?

 

[Paul_#_]

A well known way to connect the contact points (assuming you can "see" the OB contact point) is to aim CB center to the point twice the distance from the OB's center or twice the distance from the OB's outside edge to the contact point. This is called "double distance" (when doubling from centerball) or "double overlap" (when doubling from the ball's edge

The figure could be improved with some notes to get some of us up to speed quicker.

The Five ball's face is aligned with the cue ball. The Five ball's face shifts right, therefore, as cue ball shifts right with a thinner cut-shot angle . The left figure is a shot thinner than that in the right figure. The Five ball has more orange to the left than to the right of the '5' in the thinner cut.​

I like better an approach using CutShots training balls with their 100-some multi-colored spots. Take photos behind object and cue balls to see the change in visible distance between contact point and ball edge. The photos also show the distance from OB middle to contact point.

In left photo, the object ball sits on a black line pointing at a table pocket. Looking at the back of the object ball, the middle point --- the OB contact point --- is the red circle that sits above a black star. To the red-circle's right are a green star, black circle, red diamond, and barely visible, a black star at ball's edge.

The next photo is looking from behind cue ball at the object-ball middle. One can still see the red-circle contact point but it is now to the right of the ball. Next to it are still visible the green star, and a bit of the black circle, but not visible are the red diamond and black star.

Like with your figure, one can find the distance from OB center to contact point (blue diamond to blue circle to red circle) and distance of contact point to edge (green star and part of black circle). These estimates point to colored spots on the ball and not just eyeballing spots.

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