Does the EP5 need the 95 mb cards?

D7k1

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In my Nikons I use mainly the 95mb/s cards, but I've got one 45mb/s card and one 30mb/s SD card not being used so they are what I use in the EP5 - would a 95md increase the write performance of the EP5? (I know I could just stick one in and do a bunch of testing, but I've only had my EP5 since February and would like a few more experienced users to share they knowledge).
 

rparmar

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I have no idea why anyone would need that amount of capacity in a single card. Too many eggs in one basket.

And capacity has nothing to do with write performance. Which in any case is only really an issue with video. I use 32GB Sandisk Extreme cards when that is the goal.

** EDIT ** OK, I see your edit. I should have understood! But in any case I don't think the higher speeds are useful for these cameras. Higher bitrate units, yes.
 

D7k1

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I should clarify - that is not capacity but speed. On my D7100 you need 32 mb size or 64 mb size cards for video and still on a full day shoot. I also shoot a lot of video with my Ep5, its nothing to shoot 32 gigs of video in a day with the EP5.
 

dougjgreen

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Pretty sure that the OP is referring to write performance of the cards he's using, not their capacity. In my experience, 30 Mb/sec is plenty sufficient for single-shot shooting or conventional video, in my E-PL5 but I don't shoot large bursts so I could not say for sure.
 

iansmith

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I have 45Mb/s and 95MB/s Sandisk cards and the 95 gives much faster buffer clearing and burst speeds.

For video either works equally well.

I however can't get the speeds in the dpreview review of sustained 5 fps for jpg/large/fine. I can get just over 2 fps which is twice as slow as they measured. Still not sure why.
 

dhazeghi

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I however can't get the speeds in the dpreview review of sustained 5 fps for jpg/large/fine. I can get just over 2 fps which is twice as slow as they measured. Still not sure why.
That's strange. This happens when using the high-speed continuous shooting mode, not the low speed one? Make sure to test with art filters disabled and focus set to S-AF.
 

iansmith

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That's strange. This happens when using the high-speed continuous shooting mode, not the low speed one? Make sure to test with art filters disabled and focus set to S-AF.
Yeah. I recorded the shutter sounds to do the timing. I used a manual focus lens, no IS. No art filters. Tried four modes, all combinations of H and L and RAW vs JPEG.

I am timing it by recording audio. Screenshot below with notes. The 0.0 to 13.0 axis is seconds.

First set of numbers is how many frames before the slowdown, and how long it took. Second number is FPS after the buffer is full.

Subscribe to see EXIF info for this image (if available)


This is what dpreview got... http://www.dpreview.com/reviews/olympus-pen-e-p5/12

Subscribe to see EXIF info for this image (if available)


Just tried it again with the 14-42 in case the manual lens was causing issues. Got the same numbers.
 

Ricoh

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Interesting, did you use a contact microphone to do this? I wonder if some clever person could use the same technique to measure the frequency response of the shutter, and perhaps throw some light on the shutter shock syndrome?
 

gryphon1911

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In my Nikons I use mainly the 95mb/s cards, but I've got one 45mb/s card and one 30mb/s SD card not being used so they are what I use in the EP5 - would a 95md increase the write performance of the EP5? (I know I could just stick one in and do a bunch of testing, but I've only had my EP5 since February and would like a few more experienced users to share they knowledge).
Does it "need" one....no. Will it help clear the buffer faster? Yes. It can also help with download speeds to the computer as well.
 

MajorMagee

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Using a sound recording to get the timing was brilliant. It's interesting that the frequency response of the shutter click reverses itself between L and H modes. The big amplitude spike comes at the start of the L sound and at the end of the H.
 

iansmith

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Using a sound recording to get the timing was brilliant. It's interesting that the frequency response of the shutter click reverses itself between L and H modes. The big amplitude spike comes at the start of the L sound and at the end of the H.
I can't take credit for the idea, I saw someone else who had the idea first. Yeah, odd how that works.

Interesting, did you use a contact microphone to do this? I wonder if some clever person could use the same technique to measure the frequency response of the shutter, and perhaps throw some light on the shutter shock syndrome?
The shutter is loud enough that I just held the camera close to my laptop and it recorded it all easily.

Now if I could just figure out how to get 5fps steadily like it is reported to be capable of.
 

budeny

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Now if I could just figure out how to get 5fps steadily like it is reported to be capable of.
- may be we should take DPR results with a grain of salt. I did some testing and my jpeg-L rate drops below 5 fps too - on 45 mb/s Sandisk card. And I observe same results on older Sandisk Extreme III card.
 

iansmith

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- may be we should take DPR results with a grain of salt. I did some testing and my jpeg-L rate drops below 5 fps too - on 45 mb/s Sandisk card. And I observe same results on older Sandisk Extreme III card.
I've seen other sites report similar speeds, so it's not just them.
 

jnewell

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- may be we should take DPR results with a grain of salt. I did some testing and my jpeg-L rate drops below 5 fps too - on 45 mb/s Sandisk card. And I observe same results on older Sandisk Extreme III card.
I may be mis-reading posts here, but the DPR results were with 95 mbps cards. If you're using a 45 mbps card, lower speeds would be expected in a camera that's actually capable of using the speed of the 95 mbps card.
 

dhazeghi

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I may be mis-reading posts here, but the DPR results were with 95 mbps cards. If you're using a 45 mbps card, lower speeds would be expected in a camera that's actually capable of using the speed of the 95 mbps card.
Only once the buffer fills up does the card speed factor. Until then, it shoots at full speed, regardless of the memory card. You should be able to get at least 6 or 7 shots at full speed even with the world's slowest memory card.
 

jnewell

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Only once the buffer fills up does the card speed factor. Until then, it shoots at full speed, regardless of the memory card. You should be able to get at least 6 or 7 shots at full speed even with the world's slowest memory card.
True (obviously). :wink:
 

iansmith

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Only once the buffer fills up does the card speed factor. Until then, it shoots at full speed, regardless of the memory card. You should be able to get at least 6 or 7 shots at full speed even with the world's slowest memory card.
I can get the speeds shown before the buffer fills up, yes. But I need maybe 10 seconds of burst as fast as I can get, and the buffer only gives a bit over 1 second before filling.

I am using the same 95MB/s card that the various reviews use, and I can only get half the speed they report. I just tested my card with CrystalDiskMark. Seems to be working as promised. 86MB/s max write speed. 36MB/s random.

I can get 2.0 fps in RAW H mode with my 95MB/s card, and I get 1.40 fps with my 45MB/s card. Based on RAW files of 13.6MB that's 27MB/s vs 18MB/s write speeds on the E-P5. Other sites report between 4.0 and 5.0 fps using the same card and camera. I am checking all the settings, but just can't figure it out.

-----------------------------------------------------------------------
CrystalDiskMark 3.0.2 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 96.138 MB/s
Sequential Write : 86.069 MB/s
Random Read 512KB : 87.192 MB/s
Random Write 512KB : 32.327 MB/s
Random Read 4KB (QD=1) : 7.218 MB/s [ 1762.3 IOPS]
Random Write 4KB (QD=1) : 2.696 MB/s [ 658.1 IOPS]
Random Read 4KB (QD=32) : 6.172 MB/s [ 1506.9 IOPS]
Random Write 4KB (QD=32) : 2.343 MB/s [ 571.9 IOPS]

Test : 1000 MB [F: 13.4% (4.0/29.7 GB)] (x5)
Date : 2014/05/07 9:19:24
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
 
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