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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 27 Apr 2016 (Wednesday) 14:46
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1D X Mark II Owners Unite! Discuss & Post Photos

 
sploo
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Sep 27, 2016 10:02 |  #2791

bps wrote in post #18141716 (external link)
For some reason, Sandisk's 64 GB CFast card only has half the write speed it should due to the way they engineered the 64 GB variant. It only has a write-speed of 240 MB/s where as Sandisk's 128 GB CFast card has a write speed of 440 MB/s.

Solid state storage devices (including SSDs) consist of multiple flash chips. Although a vendor will likely have a variety of chip capacities available, ultimately most models will consist of more than one actual flash part to make up the total amount of storage.

Each chip will have a maximum read/write speed, so for a larger capacity variant of the product, you are likely to find there will be more flash chips, and the internal controller can write data to multiple chips in parallel.

If you look at the early days of SSDs the smaller capacity devices were usually slower, up until the midrange capacity where the performance was high enough to saturate the SATA bus, and then higher capacity models (whilst possibly able to internally write/read faster) were then no quicker as they were limited by the bus.

My guess is that the Sandisk 64GB model may be using fewer (larger) flash chips vs the Lexar. The Sandisk 128GB model may well have the same sized chips as their 64GB variant, but obviously more. I could be wrong, and Lexar might just have faster flash chips.

Writing with flash is usually harder/slower than reading, hence the disparity between the read and write speeds.


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bps
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Post edited over 2 years ago by bps.
     
Sep 27, 2016 10:20 |  #2792

jwcdds wrote in post #18141758 (external link)
Well, there's also:

Delkin's CFast 256gb $299.95
https://www.bhphotovid​eo.com …6gb_cinema_cfas​t_2_0.html (external link)

That's a steal at that price. :D I'd buy one, but I don't need one.

Perhaps others are more accepting of risk, but I am not. Yes, the Delkin is less than half the cost of everyone else, but I've read numerous reports of the Delkin card not being able to keep up with 4K video and there are a lot of complaints in the ARI segment that have experienced dropped frames. Usually if the price is too good to be true...

That's why I only use manufacturers that have a solid following, such as Sandisk, Lexar, and perhaps Hoodman.

Cheers,
Bryan


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bps
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Sep 27, 2016 10:24 |  #2793

sploo wrote in post #18141775 (external link)
Solid state storage devices (including SSDs) consist of multiple flash chips. Although a vendor will likely have a variety of chip capacities available, ultimately most models will consist of more than one actual flash part to make up the total amount of storage.

Each chip will have a maximum read/write speed, so for a larger capacity variant of the product, you are likely to find there will be more flash chips, and the internal controller can write data to multiple chips in parallel.

If you look at the early days of SSDs the smaller capacity devices were usually slower, up until the midrange capacity where the performance was high enough to saturate the SATA bus, and then higher capacity models (whilst possibly able to internally write/read faster) were then no quicker as they were limited by the bus.

My guess is that the Sandisk 64GB model may be using fewer (larger) flash chips vs the Lexar. The Sandisk 128GB model may well have the same sized chips as their 64GB variant, but obviously more. I could be wrong, and Lexar might just have faster flash chips.

Writing with flash is usually harder/slower than reading, hence the disparity between the read and write speeds.

Thank you for explaining this! Makes sense and explains things.

Regardless of how they did it, I'm surprised Sandisk cheaped out on their 64 GB model. I guess they did it knowing that it was just enough to keep up with the demands of the 1DX2 and wanted to keep costs down when they struck the deal with Canon to include their card in all of Canon's Premium kits.

Cheers,
Bryan


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budstuff
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Sep 27, 2016 16:41 |  #2794

with tamrom 35 f1.8


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jwcdds
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Sep 27, 2016 22:52 |  #2795

IMAGE: https://photos.smugmug.com/Misc/Lens/Canon-24-70L-II/i-4PgtqDK/0/XL/20160927-Canon%20EOS-1D%20X%20Mark%20II-1DX26579-XL.jpg

Julian
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GerdW
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Sep 28, 2016 03:34 |  #2796

Another one with 1000mm :-)


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Greetings,
Gerd
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texaskev
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Sep 28, 2016 04:12 |  #2797

GerdW wrote in post #18142477 (external link)
Another one with 1000mm :-)

thumbnail
Hosted photo: posted by GerdW in
./showthread.php?p=181​42477&i=i63535123
forum: Canon EOS Digital Cameras

Great capture!


Canon 1DX II, 1DX, 11-24 F4 L, 100 F2.8 L, 16-35 F2.8 L II, 17-40 F4 L, 24-70 F2.8 L II, 24-105 F4 L II, 70-200 F2.8 L II

  
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Mark ­ A.
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Sep 28, 2016 19:25 |  #2798

I did not intend for these images taken at nightfall in Germany to have this appearance (I did not change the settings from an earlier usage).
When taken, it was actually rather dark out and the monument was hard to see.
Still, I am amazed at what this camera can do in low light.
(Great lens as well!)

IMAGE: https://c2.staticflickr.com/6/5607/29994663345_b66d32e398_b.jpg
IMAGE LINK: https://flic.kr/p/MGwu​q2  (external link) 108_0459 (external link) by Mark A. photo (external link), on Flickr

IMAGE: https://c3.staticflickr.com/9/8213/29367247394_657cdc73c4_b.jpg
IMAGE LINK: https://flic.kr/p/LK5P​vC  (external link) 108_0461 (external link) by Mark A. photo (external link), on Flickr



  
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mrmaint
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Post edited over 2 years ago by mrmaint. (3 edits in all)
     
Sep 28, 2016 19:27 |  #2799

Brandywine Falls, Cuyahoga Valley National Park


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1D X Mark II, 7D: EF 70-200 f/2.8L IS Mark II, EF 24-70mm f/2.8L II, 24-105 f/4L, 100 2.8L, 40mm 2.8, 50mm 1.4, Tokina 11-16 2.8, 2 600EX-RT, ST-E3-RT.

  
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mrmaint
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Sep 28, 2016 19:52 |  #2800


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1D X Mark II, 7D: EF 70-200 f/2.8L IS Mark II, EF 24-70mm f/2.8L II, 24-105 f/4L, 100 2.8L, 40mm 2.8, 50mm 1.4, Tokina 11-16 2.8, 2 600EX-RT, ST-E3-RT.

  
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Mark ­ A.
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Sep 28, 2016 20:47 |  #2801

At photokina they had this amusement park type ride.
It was a lot of fun trying to photograph it against a harsh sky, and also, with it whipping around faster than my ability to track it.

All images are j-pegs pretty much SOOC save for cropping, because of the limited reach of an EF 24-70 lens.

Picture style was Standard.

All were AI Servo, Case 1.

I hope that this helps someone interested in the camera.

IMAGE: https://c3.staticflickr.com/8/7564/29701411370_db4cf1fe02_b.jpg
IMAGE LINK: https://flic.kr/p/MfBu​Pu  (external link) 109_0804_1 - Version 2 (external link) by Mark A. photo (external link), on Flickr

IMAGE: https://c7.staticflickr.com/9/8311/29701474070_b425d0dc6d_b.jpg
IMAGE LINK: https://flic.kr/p/MfBP​sw  (external link) 109_0830_1 (external link) by Mark A. photo (external link), on Flickr

IMAGE: https://c6.staticflickr.com/6/5346/29912219021_8e633980ee_b.jpg
IMAGE LINK: https://flic.kr/p/MzeW​Aa  (external link) 109_0846_1 (external link) by Mark A. photo (external link), on Flickr

It was a rush to stand immediately in front of this thing's arc which whooshed over and could have taken off, my head!

IMAGE: https://c4.staticflickr.com/6/5222/29368672683_dfccee19cd_b.jpg
IMAGE LINK: https://flic.kr/p/LKd8​cz  (external link) 109_0899_1 (external link) by Mark A. photo (external link), on Flickr

IMAGE: https://c3.staticflickr.com/9/8074/29367806394_61c999c24a_b.jpg
IMAGE LINK: https://flic.kr/p/LK8F​Fy  (external link) 109_0952_1 (external link) by Mark A. photo (external link), on Flickr

IMAGE: https://c7.staticflickr.com/6/5819/29961125006_245c10310e_b.jpg
IMAGE LINK: https://flic.kr/p/MDyA​CN  (external link) 109_1209_2 (external link) by Mark A. photo (external link), on Flickr



  
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jwcdds
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Sep 28, 2016 21:47 |  #2802

IMAGE: https://photos.smugmug.com/Misc/Lens/Canon-24-70L-II/i-6XTrQ7n/0/X2/20160928-Canon%20EOS-1D%20X%20Mark%20II-1DX26666-X2.jpg

Julian
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Dankata
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Sep 28, 2016 22:02 |  #2803

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IMAGE LINK: https://flic.kr/p/MGHP​Az  (external link) S+R (external link) by Daniel Stoychev (external link), on Flickr

-Daniel-
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T1i |85 1.8 | 18-55 | Sigma 10mm f/2.8 Fish Eye | Yongnuo YN-622C| Raynox DCR-250
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Phoenixkh
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Post edited over 2 years ago by Phoenixkh.
     
Sep 28, 2016 23:01 |  #2804

Are any of you using both the CFast as well as the CF slot and if so, how does it affect fps and the buffer?

In addition, what CF cards are you choosing since none of them have anywhere near the write speeds of the CFast cards?

If one of my guitars sells, I'll be joining the club. Fingers crossed.


Kim (the male variety) Canon 1DX2 | 1D IV | 16-35 f/4 IS | 24-105 f/4 IS | 100L IS macro | 70-200mm f/2.8L IS II | 100-400Lii | 50 f/1.8 STM | Canon 1.4X III
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HKFEVER
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Sep 28, 2016 23:14 |  #2805

Phoenixkh wrote in post #18143294 (external link)
Are any of you using both the CFast as well as the CF slot and if so, are the shutter speeds affected?

In addition, what CF cards are you choosing since none of them have anywhere near the write speeds of the CFast cards?

If one of my guitars sells, I'll be joining the club. Fingers crossed.

I have both CFast and CF in it:
- CFast for Raw
- CF for JPG
- Can't really tell the CF has slow down anything  :p




  
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