A 2 gB CF card joins the Canon 5D.

When I first got my Canon EOS 5D I opted for two of SanDisk’s fastest 1 gB cards, the so called Extreme III, costing $103 each in February, 2006.

As digital tends to result in more pictures being taken, and as I shoot only in RAW on the 5D, given the ease of processing RAW images in Apple’s Aperture, I found myself running out of space on these cards more frequently than I like. Each holds 58 RAW images.

CF card prices continue to come down apace in price so I have added one 2 gB Extreme IV card, $91.95 after rebate to my CF card collection. Twice as much storage for less than a 1 gB card just 9 months earlier!

SanDisk claims the Extreme III can write data at no less than 20mB per second; by comparison, the Extreme IV is rated at ‘up to 40 mB per second’. Now ‘up to’ probably is some sort of ideal scenario and I have no idea if the card is faster as, with the 5D’s huge internal buffer I don’t need to care, but there’s no denying the capacity increase.

With an empty 1 gB card

With an empty 2 gB card

Now 120 photographs in one session is a lot for this photographer, but not having to change cards in ‘mid roll’ is one less thing to worry about. Further, these cards are so reliable in use that I am far less concerned about data loss than when I first got the 5D – the argument being that it’s better to store images over several cards to reduce loss if a card goes bad.

The largest card on the SanDisk web site is a 16 mB Extreme III which would store no fewer than 960 (!) RAW images, albeit at a punitive cost in excess of $1,000. Which, I suppose, means it will be $200 in twelve months’ time. Maybe I will be writing this piece again in a year, extolling the virtues of a thousand image card….