Time To Play Stump David Mullen!!

[Elhanan Matos]

Yet, even when you tell your AC to set the lens at T2 and a 2/3rds, there's no marking for 2/3rds, its only an approximation.

 

The Cooke S4's have marks for 1/3 and 2/3 and so do the DigiPrimes.

[Alvin Pingol]

Current MPUs such as the Pentium 4 and AMD Athlon XP series, which are approximately equivalent in performance, use 32-bit busses throughout. The largest number of which they can conceive is 4,294,967,296, or 2^32. Larger numbers require several consecutive operations and a combined result (C programmers may blast on about Double or Long ints, but that's emulated by the arithmetic unit). You can buy an AMD Athlon 64 or Opteron FX series processor, or an Intel Itanium (which is somewhat more obscure) and they have 64-bit data and address busses. The principal advantage of current 64bit MPUs is that they tend to have very fast memory interfaces, which is critical to media applications where you're constantly fetching things like image data from memory. Contrary to popular belief, doubling the width of the data bus does not make a processor twice as fast (just like multithreading doesn't make a Pentium 4 equivalent to a dual-CPU system.) 64bit MPUs can process calculations to twice the precision of an 32bit device in the same amount of time, so it will tend to be faster for applications where you require very accurate mathematics. Discrete cosine transform encoding (used in many video codecs) and certain types of image processing might be candidates for this, although most current DCT implementations wouldn't be, and these things might get faster because you can do in one cycle (or more than one per cycle) what previously took more than one floating-point arithmetic operation and a logical combine. These applications will get faster in proportion to the amount of high precision mathematics they do, but there is no other intrinsic benefit.

<{POST_SNAPBACK}>

 

That's what I was going to say.