Thanks Mathew! Except for Phil's they show that the clubhead is moving slightly downwards and that it is the face of the club that is causing the ball to rise, as in "let the club do the work". So there is no need to hit the ball on the upswing, and that Homer's statement "The ball should always be struck prior to the low point of the Downstroke, even when using the Driver" is not in dispute. Am I imagining it, in seeing some evidence of ball deformation?
As Milrat has said the camera angle can play tricks, but nevertheless we are that much further ahead than simply opinions and/or the written word. I wonder what sort of camera speed and setup is required (and I wonder who has those resources) to set the record straight once and for all.
Thanks Weightshift - cos Phil Mickelson is a left hander and thus hitting the other way - its still downwards....
Millrat - Whilst I can agree that perspective can play tricks on particular things (ie side view and inclined plane) - I can't see how any illusion that could be present to decieve the viewer. Because we can be pretty positive that the camera view is taken at a parallel plane to the horizontal ground at approximately ball height. Whilst the camera may or may not be rotated away and thus not nessesarily be absolutely dead square on to the inclined plane, it will do nothing to decieve on the clubhead going downplane. You can see clearly that the clubhead is getting closer to the ground - no camera deceptions are going on.
On another note in practical terms for a golfer engineering his address. When the ball is teed higher than the sweetspot on the club - which can be desirable, the adjustment is made in the secondary hinge which lifts the primary lever assembly up and down whist staying in the vertical plane of the primary hinge in a circular motion around the left shoulder, so in effect you tee it slightly off the toe of the club by means of adjusting the secondary hinge...
Matthew - please dont take this the wrong way - and I admire and salute your effort in posting the pics, but in my humble opinion (yeah yeah, I know, opinions are like...)
The pics to me, are inconclusive. Retief looks like his might be up, Scott's looks like a 3 wood (versus driver), Vijay's looks like its on the upswing, and Phil's (in the background) looks like the camera is not level at all (assuming it would be level with the ground - again, see behind Phil's driver). Again, I applaud your effort, but feel they may be inconclusive.
My understanding is Homer certainly knew that Pro's can and do (no percentage's) hit the ball with their driver on the upswing - thus maximising roll.
Great conversation and I look forward to seeing more comments - if I get the chance I will try to post some pics as well.
I think a lot of confusion is that most relate everything to the ground.
If the swing is always moving "down" until the shaft is in line with the lead arm, the one can still be swinging "down" yet with the proper axis tilt, can be swinging level or even "up" in relation to the ground.
I would even venture to say with an iron swing, low point is not at the bottom of the divot, but at the point where the shaft lines up with the lead arm (low point could even be after the club has left the divot and is above ground.
I think a lot of confusion is that most relate everything to the ground.
If the swing is always moving "down" until the shaft is in line with the lead arm, the one can still be swinging "down" yet with the proper axis tilt, can be swinging level or even "up" in relation to the ground.
I would even venture to say with an iron swing, low point is not at the bottom of the divot, but at the point where the shaft lines up with the lead arm (low point could even be after the club has left the divot and is above ground.
Bruce
I most certainly agree. Perhaps it is more useful to think of 'low point' as the point farthest away from 'center', rather than it having any relationship to the ground.
There is a difference in perspective between the low point of 'force' (both arms straight) and the low point of the clubhead (at left shoulder, relative to ground, right arm stil bent).
This, IMO is the core reason for 1-L-15.
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I most certainly agree. Perhaps it is more useful to think of 'low point' as the point farthest away from 'center', rather than it having any relationship to the ground.
There is a difference in perspective between the low point of 'force' (both arms straight) and the low point of the clubhead (at left shoulder, relative to ground, right arm stil bent).
This, IMO is the core reason for 1-L-15.
Are we seriously considering that the in-line condition (arm and clubshaft), no matter where achieved, is low point?
We intend to strike a ball that lies on the ground, or on a tee that lies on the ground. Low point must IMO be in relation to the ground. Although I must admit I've more to but I understood Low Point to be the lowest point (elevation) in the clubhead's orbit.
Thanks Weightshift - cos Phil Mickelson is a left hander and thus hitting the other way - its still downwards....
Millrat - Whilst I can agree that perspective can play tricks on particular things (ie side view and inclined plane) - I can't see how any illusion that could be present to decieve the viewer. Because we can be pretty positive that the camera view is taken at a parallel plane to the horizontal ground at approximately ball height. Whilst the camera may or may not be rotated away and thus not nessesarily be absolutely dead square on to the inclined plane, it will do nothing to decieve on the clubhead going downplane. You can see clearly that the clubhead is getting closer to the ground - no camera deceptions are going on.
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I guess we're left to make assumptions in this case about the camera position and angle. I'm not so much disputing it as trying to understand it.
)
but I understood Low Point to be the lowest point (elevation) in the clubhead's orbit. 
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