Lumix g7 SD card

[DylanAustin]

Hello all! I recently purchased a lumix g7 and it came with a memory card. 

The memory card is a SanDisk Ultra 80MB/s sdhc I u1 c10. 

The camera says that it records 4k at 100mb/s which would be less than

100 MB/S I THINK. 

I called a camera shop and the gentleman told me I should get a 250 dollar 250MB/s write speed SD card because the longer I record the more information is sent per second. 

Essentially saying that it starts at 100mb/s but constantly grows in how many mb/s it is writing at. This sounded like tomfoolery to me so I ended our chat. 

Can some nice person recommend a good 32gb SD card that is fast enough for the lumix g7? Thank you in advance. - Dylan Austin

[Zagna]

That is 100Megabits/second which is 12.5Megabytes/second. And the card is capable of 80Megabytes/second reads, writes are slower.

That U1 logo on the card says that is capable of at least 10Megabytes/second writes. So try it, if it can write quick enough, it'll be fine.

If you want a card "rated" for 4K, look for an U3 or V30 class SD card.

[xQubeZx]

I’d get the SanDisk Extreme or Extreme Pro cards. They are very solid and come at a decent price. With those you can record 4K without issues. However I don’t know how it is on Panasonic but on my Sony you need at least a 64Gb card to record to some formats. There is something funny about how SD classes work apparantly. What that sales rep told you is completley false though. A 64gb SanDisk Extreme Pro will go for about 40-50USD which they are well worth. The ”Extreme” variant is slighlty cheaper for about the same performance. 

[EsaT]

2 hours ago, DylanAustin said:

The memory card is a SanDisk Ultra 80MB/s sdhc I u1 c10.

Of course Sandisk might have switched components, like higher density NAND chips with fewer of them in parallel, but would expect around 20MB/s write speed s minimum.

https://www.amazon.com/gp/customer-reviews/R283J80TOEWCYP/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B0143RT8OY

 

Would be easy to test speed of that card in PC if you have USB3 card reader.

https://crystalmark.info/en/software/crystaldiskmark/

https://www.atto.com/disk-benchmark/

https://www.alex-is.de/PHP/fusion/downloads.php?download_id=9

[xQubeZx]

5 hours ago, EsaT said:

Of course Sandisk might have switched components, like higher density NAND chips with fewer of them in parallel, but would expect around 20MB/s write speed s minimum.

https://www.amazon.com/gp/customer-reviews/R283J80TOEWCYP/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B0143RT8OY

 

Would be easy to test speed of that card in PC if you have USB3 card reader.

https://crystalmark.info/en/software/crystaldiskmark/

https://www.atto.com/disk-benchmark/

https://www.alex-is.de/PHP/fusion/downloads.php?download_id=9

No need to test the card. I’ve got an Ultra myself and its pretty slow. The high burst mode on my A6000 is too much for it to handle, it slows down almost immediatly compared to the Extreme card that keeps up for a few seconds (probably not the SD card that is the main problem at that point) 

[EsaT]

15 hours ago, xQubeZx said:

The high burst mode on my A6000 is too much for it to handle, it slows down almost immediatly compared to the Extreme card that keeps up for a few seconds (probably not the SD card that is the main problem at that point) 

Shooting RAW images has lot higher bandwidth/write speed requirement than compressed video:

Single RAW image takes as much space as two seconds of 100Mbps video.

[xQubeZx]

40 minutes ago, EsaT said:

Shooting RAW images has lot higher bandwidth/write speed requirement than compressed video:

Single RAW image takes as much space as two seconds of 100Mbps video.

Yes, but shooting 4K 24fps will not work on the SanDisk Ultra card. Belive me, it will cause issues and just be a pain. I’ve tried. I believe that you should get good quality cards. It also sucks if you need to replace all your cards once you get a new camera that shoots at higher bit rates or just writew more data. I donno about you guys but I have like 8 cards I use and replacint them all would cost a lot. Better to get something good from the start.