Thanks Godfrey, some pretty obvious things which I've never noticed/paid attention to.
Kenneth Waller ----- Original Message ----- From: "Godfrey DiGiorgi" <[EMAIL PROTECTED]> Subject: Re: How does one unlock an SD card?? > > On Jan 9, 2007, at 9:26 AM, Kenneth Waller wrote: > >>> Talk to anyone who worked within the retail industry and they will >>> have >>> some >>> sort of horror story about bent pins on CF cards. >> >> I don't doubt that for a minute. My question is why are CF cards "more >> prone" to issues than the SD card? > > - CF card are much more regular in shape compared to SD cards, so > it's easier to recognize correct orientation with the SD cards when > inserting into the a reader cage. The SD card shape also has a > physical block to prevent insertion with the wrong orientation. > > - CF cards use a fine pitch, 50pin interface ... the card has to be > very precisely aligned to slide those 50 sockets over their pins > exactly right, and the pins have to be very fine wire, while still > capable of withstanding a bending load. Compare that with an SD > card's small number of broad contract patches that spring-loaded > contact fingers slide across ... the sliding contact alone helps keep > the surface clear. > > - The multipin interface socket of the CF card has a nearly > symmetrical shape and must fit snugly for best pin contact, which > makes insertion and removal more difficult in many implementations. > The SD card interface and card spec allows a simple latch-over spring > ejection mechanism, which makes it easier to put them in and take > them out. > > Godfrey > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
