> > From: Godfrey DiGiorgi <[EMAIL PROTECTED]> > Date: 2006/07/04 Tue PM 10:41:41 GMT > To: Pentax-Discuss Mail List <[email protected]> > Subject: Re: Toshiba Announces a 4GB SD Card > > On Jul 4, 2006, at 3:06 PM, mike wilson wrote: > > > I should have written self powered. The risks are, of course, higher, > > as they are with any increase in technology. Proper design should > > deal > > with that problem. Replaceable cells would obviate the possibility > > of a > > shortened lifespan for the card. > > > > If it gave me the possibility of much higher write speed for a > > slightly > > higher price, I would definitely be interested, as would many people. > > Such a device would likely have to be much more expensive and they > would require different, more expensive high speed interfaces to the > camera data bus to achieve faster speeds. (The bus that connects RAM > speed components inside the computer or camera is much faster than > the bus that connects said components to a secondary storage device.)
Without a specific camera schematic and specifications, it's guesswork. What made me think of it as a possibility is the way the *ist series' firmware has been upgradeable to deal with such things as faster cards. It strikes me that there has been a level of overengineering designed into the camera to allow this. A _really_ fast writing card would take full advantage of it. > > Basically, you're not going to make a self-powered mediacard with > high speed RAM that achieves significantly faster transfer speeds > without building a complete IO system optimized to that performance > requirement. Such a system would cost substantially more. > > Godfrey > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > ----------------------------------------- Email sent from www.ntlworld.com Virus-checked using McAfee(R) Software Visit www.ntlworld.com/security for more information -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
