Sveiki nju skatos jaunu SD karti 4GB! Tikai nevaru iebraukt kura no shiim karteem ir leenaaka kura aatraaka! Jo speedi (aatrumi) ir mineeti tikai dazzaam karteem! Un ar ko atshkjiras piem., SD class 2 no class 4? Skatiijos konkreeti ieksh www.metaleks.lv...
Nju jautaajums tad taads kura no taam 4gb karteem ir aatraakaa! Paldies jau ieprieksh! :wink:
Class explanation: The SDHC card is compliant with the SD speed class rating specification created by the SD association which introduced a new speed classification according to the application:
Class 2 : >=2MB/s TV recording / DVD/ standard DC Class 4 : >=4MB/s Mpeg2 (HDTV)/ DC with continuous shooting opti Class 6 : >=6MB/s Reflex DC and professional DC - on continuous shooting
* Do take note that Class 2 SDHC Card is generally cheaper than Class 4 SDHC due to the speed difference.
* You also need to take note on the compability issues while purchase the SDHC Card:
* SDHC Host devices can use SD (up to 2GB) and SDHC (4GB and more) Memory Cards. * SD Host devices can use only SD Memory Card (up to 2GB). Therefore SDHC cards are never compatible with SD Host products
Runcio, lai nu kursh, bet tev ar guugli buutu jaabuut apzistamam. :shock:
The form factor or "size and shape" of the MMC Card and the SD Card are identical. As such they are generally interchangeable types of flash memory. If your camera or PDA will take SD Cards, then it is a good bet that it will take MMC Cards as well, and vice versa.
A very common question we get asked is the difference between the SD and MMC formats. As a rule, SD cards are slightly more expensive than MMC cards. The question is, what do you get for the extra money when you purchase SD?
There are 5 main differences between the two: speed, durability, write-protection, copyright protection, and size.
Speed Maximum transfer rates of SD are faster than that of MMC. SD has the capacity of being 4 times as fast as MMC. Whereas MMC can transfer data at 2.5MB per second, SD can transfer data up to 10MB per second. These are maximum speeds and will depend on the device utilizing the card.
Durability The thicker casing and, apparently, changes in the design of the cards means that the SD card is more durable and resistant to electrostatic discharge. Having said this we have had no MMC card failures or complaints from users regarding reliability. Write-protection SD includes a small switch on the side of the card that has two settings: Locked and Unlocked. If you set the card to the locked position, devices will not be able to write to the card, erase data from the card, etc.
Copyright Protection This is the most mysterious difference in the two media. According to the spec sheet provided by SanDisk (one of the consortium that developed the media), SD includes "cryptographic security for protection of copyrighted data." Presumably, this is to prevent people from copying information from a card (e.g., a card with games on it) and distributing it to other people.
It appears that this copyright protection may actually consume several 100kb of space on the card - which you cannot get back. The amount of space lost on a card is higher for SD than for MMC, or so it seems. Not necessarily a bonus for the consumer.
Another question that arises frequently is due to the discrepancy between the cards "claimed" capacity and what you see when you view it through your file manager or card reader connected to your computer. For example, if you buy a 64MB card and look at the free space shown, you will see that there is less space than this available on the card.
Where did the space go? To understand why your 64MB card has only 60.9MB of space, it is necessary to define what we mean by a MB or megabyte.
The "dictionary" definition of MB, and that which is used by software such as Windows Explorer is that 1 Megabyte is equal to 1,048,576 bytes. This is the case because there are 1,024 bytes in a kilobyte and there are 1,024 kilobytes in a megabyte. Remember that computer capacities are measured in powers of 2. A kilobyte is 2 to the 10th power. A megabyte is 2 to the 20th power.
Manufacturers who produce storage media, however, use a different definition of megabyte: 1 MB = 1 million bytes. It's a simpler definition to understand, but it causes a large discrepancy when you start talking about large numbers of megabytes.
A "64MB card" will hold only 64,000,000 bytes (not 67,108,864 bytes) worth of programs, data, etc. If you divide that by 1024 (the number of bytes in kilobyte), you find that it will hold 62,500 kilobytes. If you divide that number by 1024 (the number of kilobytes in a megabyte), you find that the card will hold only 61MB. The two different definitions "cost" you approximately 4MB on a "64MB card."
It is a confusing concept if you're not used to thinking of bytes, kilobytes and megabytes being determined by powers of 2. What this means, basically, is that if you have a 62MB file (say, a video), it will not fit on a 64MB card.
Note that there is also a chunk of space that is taken by system files, which amounts to around 100k on an MMC card (which is why the 64MB card shows up as 60.9MB; you start with 61MB and subtract about 100k). These system files seem to be much larger (more than 900k) on SD cards.
Also, remember that the discrepancy gets bigger as file sizes get bigger. A 512MB card, will actually hold only about 488MB worth of data, for a loss of 34MB!
The main difference we have found that is of use to our clients is the write protect tab. If you are concerned about accidental erasure of crucial data, SD card could very well be the way to go.
njaa Juri, pamekleet jau vereeju vnk, ljooti daudz darbu tagad! takaa nesanaaca laika pamekleeties, un maajaas ir naaviigi leens nets! Bet paldies par tavierm ieguldiijumiem mekleejumos! Tagad skaidrs, ja njemu tad SD nevis MMC! Laikam tad buus jaapaliek pie shii varianta!
man viena 2 Ggb Apacer ar 150 X speed, tā OK., kurām ātrums nav pieminēts, lēnākas. tos parametrus, ar kuriem var palepoties jau piemin, par citiem smalkjūtīgi klusē.
kautkur citur?, bet vai nav domāts, ka noformatizē - bet diez vai var kā var 1,2 Mb flopi formatizēt kā 760 Kb, tā 4 Ggb karti, kā 2 Ggb, varbūt domāts, ka formatizē citā kamerā, kura akceptē?
Da jeb kura karte ir OK, kurai ātrums ne mazāks ka X50. Spogulenei lēnāka neder.
principā? buferis d80, par provi, tā uz čuteni pietiek dažām s, nu, 3-5 un gan jau pa otru galu pa to laiku, kamēr buferi piemauc, nāk arī kas ārā. bet starpību starp 50X un 150 X jūtu gan, ja maucu ātri un daudz no vietas.
Nju shmaa karte ko noskatiiju ir tikai SD HC class 2, es saprast ka shamaa r speed 150x vajadzeetu dereet, nedereeja jau laikam SD HC class 4! Vai tomeer neder visas SD HC ???
Nju laikam tad drosh paliek bailiigs nenjemshu SD HC, bet njemshu parasto, tik razzotaajas taads nezinaams! :/
nenjem tikai silicon power reklameeja tjipa 80x aizrijaas jau pie 6kadra :evil: , kingston 50x tiku liidz 150 un tad man apnika. starp citu Tavs hc ir jauns formaats pat parastie karshu lasiitaaji sho nesaprot, tikai hc atbalstu.
nu ar 30D 5 kadri/s nejutas atruma kritiens pat rawa lidz kadam 40itajam kadram, reti protams ta bildeju
!!! Tā jau it kā nav filmēšanas kamera, ja vajag 40 kadrus sērijā (nu nenāk prātā kam varētu būt vajadzīgi pat vairāk par 5 kadri sērijā(man jau liekās ka pat ar 3 pietiek pilnībā) ) , tad filmēšanas kamera jāpērk
itkaa laikam ja karti noformateeju kur citur kjip karshu lasiitaajaa, tad iespeejams ka buus ok! Vnk, negribas riskeet, jo veikalaa teica, ka buushot problemaatiski pienjemt preci atpakalj ja man taa nedereeshot!
