Without knowing the tire size at all you could use the un-overlapped part of the tire's white manufacturers name at the top of the tire to roughly calculate the amount of rotation in 1/250 of a sec. as a percent of full rotation. The lighter ends of the ghost image seems equal fore and aft. Take that distance and see how many times it can be laid, at the same distance from the center, around the tire. I figure roughly 20 times.
Of course, the math proves the approx. 1/15th rotation if the tire diameter is known. On Dec 25, 2010, at 17:30 , Doug Franklin wrote: > On 2010-12-25 18:22, Igor Roshchin wrote: >> I don't think that it is exactly the moire effect, as there >> are no true interference, and there are no different-angle grids. > > You are, of course, correct. I was using the term "moire" at more of a meta > level. The overlap is a sort of interference, if you look at it from a high > enough altitude. :-) > > -- > Thanks, > DougF (KG4LMZ) > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- It's not that life is too short, it's that you're dead for so long...... — Anon Joseph McAllister [email protected] http://gallery.me.com/jomac -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
