The D70s is an older model in Nikon's line of digital single lens reflex (DSLR) professional-grade camera. It uses CompactFlash (CF) memory cards rather than the SecureDigital (SD) cards used with many newer cameras as of 2010. Nikon has posted a list of the CF cards it has officially tested to work with the D70s on its website.
SanDisk
According to Nikon's website, you can use a variety of SanDisk-manufactured CF cards with the D70s. The compatible cards include any card from its SDCFB (types I or II), SDCFH ("Ultra" or "Ultra II") and SDCFX ("Extreme" or "Extreme III") series. Nikon lists an extensive range of compatible capacities. The SDCFX Extreme III series, for example, can be used for cards up to 2 gigabytes (GB) in size, whereas the SDCFB Type II has been tested as compatible only up to 300 megabytes (MB).
Lexar Media
The D70s is compatible with many of the CF cards Lexar Media manufactures. According to Nikon, cards in Lexar's standard and "Write Acceleration" (WA) format work with the D70s. Lexar's nomenclature system for its CF cards entails a number plus the letter "x." Its D70s-compatible cards start with the "4x," which has the smallest capacity (16 MB), while the WA-formatted "80x" is compatible in capacities of up to 4 GB.
Microdrive and Hitachi
Nikon also recommends several CF cards from other manufacturers, namely Microdrive and Renesas Technology by Hitachi. Nikon certifies that Microdrive's "DSCM" and "3K4" CF cards work with the D70s in capacities of 512 MB to 4GB. It recommends the Renesas Technology HB28C8x only in 16 MB and 32 MB sizes.
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