Originally posted by Adam Extreme Plus cards have a lower speed rating but are still very good; Extreme Pro cards are the best money can buy.
Yet another +1
I would forget about anything lower than class 10 - even forget about class 10 NON-uhs cards. Your K-3II really
can use all the extra speed you throw at it.
You could also do what I've done and get a lower capacity ExtremePro(95MB/s write speed) card for slot 1.. Get one big enough for most of the shooting you might do, taking into account your use of any possible burst speed shooting. Then get a lower speed (i.e. 45MB/s write speed or higher), higher-capacity card for overfill in slot 2.
For myself... I have a 32GB Sandisk ExtremePro(95MB/s write) card in slot 1, and a 128GB Transcend (60MB/s write) in slot 2. Quite frankly, I'll likely never even get
close to filling the 32-GB card - but it's reassuring to have that extra space available.
When looking at cards, make sure you are reading what the specified
write speed is - not the read speed. Most have higher read and lower write speeds, and some brands have deceptive advertising of their speed - they try to pass off the
read speed, as if it might be their
write speed.
Back when I was doing testing with my K-30 there was, in fact, a noticeable writing speed-up when comparing a 45MB/s-write card to a 95MB/s write card.