Sd cards for R7?

Biertje wrote:

Distinctly Average wrote:

Ephemeris wrote:

maarensv wrote:

Ephemeris wrote:

maarensv wrote:

charlyw64 wrote:

But for a few shots more in a sequence I don't see the return in going for V90 compared to the price...

You get a €1500 camera body and find €100 (128Gb V90) too much for an appropriate card. I always get a card that is faster than the camera can handle. The R7 does up to 185Mb/s in camera write speeds. Getting a V90 is worth it IMO.

How does this compare to the example provided?

The thread does focus a little on stills but does it affect any video modes?

€100 is €100 so understanding what valid benefits you will see from this seems sensible.

Sure, in many, if not most, cases a V60 card is just plenty enough. It is just not up to the performance of the camera. You can easily see that in RAW buffer clearance times, where it takes a V90 card about 6 sec and a V60 around 16 sec to clear. Important ? Probably not, but the extra investment is limited compared to the camera's price. Just that.

All understood. I don't have that camera but with what Distinctly has said the differences were quite small but 6s to 16s would seem quite a margin.

There are v60 cards and v60 cards. My details were based on the Lexar card I linked to which is a v60 capable of 270mb/sec. As you can see from the images in the above posts, the v90 cards shown are capable of 300mb/sec so only slightly more.

That's read speed though isn't it? The Lexar 1800x v60 is 270mb/s read, but 180mb/s write. Where as the 2000x v90 is 300mb/s read, but write is 260mb/s. It's the write speed you're interested in, rather than the read speed that manufacturers put on the cards.

The point being the R7 is only capable of write speeds around the 180mb/s mark so that Lexar is very near that speed. Having tested a v90 and that v60 the times are very close as the R7 is the limiting factor in the most part.

We also have to take into account sustained write speed, not all cards are made equal in that area.

So a good v60 SD card can put perform a weak v90.

Hopefully the v90 premium will come down over time. The doubling in cost doesn’t always make sense.

Given the R7 is supposedly capable of 185mb/sec both those cards are faster than the camera is capable of.

I mention though there are differences in cards. Some have a buffer, which can be written to at high speed, which is often where the speeds quoted will come from. That doesn’t mean a card is capable of sustained write speeds to match, which is why some v60 and some v90 cards fall down. As soon as that initial buffer is full, the cards grind to a stop which is probably where the 16 seconds result came from. I have tested again today with the aforementioned Lexar card and I am repeatedly getting 6-7 seconds clearance times.