On Thu, 16 Jul 2009 20:27:23 -0700 (PDT), harry k
wrote:

On Jul 16, 11:26*am, DerbyDad03 wrote:
On Jul 16, 12:57*pm, Smitty Two wrote:

In article
,

*DerbyDad03 wrote:
I have not been able to find an on-line copy of
the commercial.

snip

when I run my DVR in frame-by-frame mode, it still
appears that the drill and bit is rotating in reverse.

Step up to the plate in the name of science, and be the first to post
your clip online.

I don't have a "clip".

I rewound the DVR while watching the show and stepped through the
commercial to see what it looked like in slow motion. I did not record
the show.

That said, I'm still looking for an answer to my question: Would the
wagon wheel effect be captured while filming the commercial and thus
be captured by my DVR or is the wagon wheel effect "perception" in all
cases?

Now I wonder too. It used to be common, especially in westerns. I
can't recall seeing an example from other than old films.

Harry K

Once again... The film frame rate was different than the 60 cycle
timing used as the basis for television video. If something is
recorded originally on video rather than film, it won't exhibit the
effect, because the original recording will have used the same 60
cycle standard as the TV used to reproduce it.

The reason it used to be more common is that today, less TV production
work is done using photographic film as the media.