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Thread started 28 Aug 2014 (Thursday) 18:20
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SD (not micro) to CF adaptors to fit 5D3?

 
Traybor
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Aug 28, 2014 18:20 |  #1

Hi guys, I know there's been discussion before about the slow SD slot and also about SD to CF adaptors etc but couldn't find the answer to this.

I've just found out to my dismay about the write performance problem with the SD slot, after recently buying a couple of fast & large capacity SD cards as I'm doing timelapse stuff.

Obviously I'm disappointed to have spent money on 2 cards that don't cut it, but not because of the cards themselves, because of the camera.

What I need to know is where I can find an adaptor that takes a normal size SD card (not a micro SD), and is for fitment in a CF1 slot, not a CF2 slot.
All the ones I find for CF1 slots only take micro SD cards.(

Does anyone know if the right adaptor exists?! And assuming I find one, will I then get the benefit of the fast SD cards by using them in an adaptor in the CF slot?

Thanks for any input and sorry if this has been covered and I couldn't find it!


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ddk2001
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Aug 28, 2014 18:30 |  #2

I've never seen one - and don't think they do (or could) make one.

A Type 1 CF card is 3.3 mm thick. An SD card is 2.1mm thick. I can't imagine an adapter that can accommodate the 2.1mm thickness of the SD card in the 3.3mm depth of the CF1 card. They've got them for the MicroSD cards - likely because the MicroSD is only 1mm thick.




  
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Traybor
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Aug 28, 2014 18:35 |  #3

Ahh - that makes sense then, thanks for clarifying.

Does the mk2 have a CF2 slot or CF1 then? I forget now, but I've seen ones advertised for the mk2 I'm sure, but not the mk3? Maybe I imagined it of course.

Well this is a bit of a problem then :(
Can't believe I only just found out, but then I've never previously had the need to continually shoot raw for more than a couple of hundred shots at a time, so have been fine with my 8gb Sandisk extreme CF cards, then recently got into timelapse and bought some large & relatively cheap fast SD cards to 'upgrade'. :(

Guess I'll have to see if my friends need any SD cards!


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John ­ from ­ PA
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Aug 28, 2014 19:10 |  #4

Putting an SD card into a CF adapter is not likely to result in vast speed increases, if any at all. CF cards are faster because they have a built-in controller. The SD card relies on the camera internal processor as will the SD card in a CF adapter.




  
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Gregg.Siam
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Aug 29, 2014 02:03 |  #5

Traybor wrote in post #17123431 (external link)
I've just found out to my dismay about the write performance problem with the SD slot, after recently buying a couple of fast & large capacity SD cards as I'm doing timelapse stuff.

Obviously I'm disappointed to have spent money on 2 cards that don't cut it, but not because of the cards themselves, because of the camera.

I don't get what you are trying to do. For starters, there is zero performance hit if you are writing to one card and not both at the same time.

Why do you want an adapter in the first place? Your SD cards will perform as advertised. If they don't, it has nothing to do with the camera (assuming you are shooting with a single SD card).

It sounds like you are thinking you can put a SD card in a CF adapter and somehow get CF speeds or fake the camera into thinking the SD card is a CF card. I have no idea why you would want to do that as the SD card will perform as it would normally.

Lastly, adapters almost always slow read and write speeds down due to overhead.

Here is a SD to CF1 adapter
http://www.amazon.com …tal-Cameras/dp/B00008WD8W (external link)


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Traybor
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Aug 29, 2014 02:54 as a reply to  @ Gregg.Siam's post |  #6

Thanks for the link, that's great but I'll have to look for that model where someone has stock. Great though cheers.

I'm not sure what's not to get sorry.
The write speed in the mk3 SD card slot is maxed at about 20MB/s which is no use to me, and I only found this last night.

So I've bought fast SD cards for timelapse only to find they will not run at their proper speeds due to canon using a crap bottlenecked interface with the sd slot.

So an adaptor can provide a speed increase by allowing the sd cards to run in the cf slot.

It's well documented about the sd thing. I just hadn't seem it til yesterday. :(


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Aug 29, 2014 04:57 |  #7

Have you tried out your scenario already and found the SD card speed limiting?


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Traybor
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Aug 29, 2014 06:40 as a reply to  @ TeamSpeed's post |  #8

Very much so yes.

I try to get a sustained 1fps timelapse running with intervalometer and as soon as to buffer is full it struggles and does erratic shots because it cannot write to SD fast enough despite the card having 60MB/s write speed.
The same kind of card but CF with 60MB/s has no problem.


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Aug 29, 2014 07:25 |  #9

Maybe this then?
http://www.amazon.co.u​k …eed-Adapter/dp/B004QY0M7C (external link)

Are you shooting raw and jpg, just jpg, or mraw? Choosing a different size image type might help.


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Traybor
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Aug 29, 2014 07:56 |  #10

Thanks

I just shoot raw so it's shooting around 25MB/s but can only write to sd at 20, hence the problem, even though its a 60 write card.

That adaptor won't fit as its cf2 and the 5d3 has a thinner cf1 slot unfortunately. All the cf1 adapters seem to take micro sd cards only because of the thickness problem that ddk2001 described.

Except the one linked further down which is out of stock alas.


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Aug 29, 2014 08:24 |  #11

Traybor wrote in post #17124119 (external link)
Very much so yes.

I try to get a sustained 1fps timelapse running with intervalometer and as soon as to buffer is full it struggles and does erratic shots because it cannot write to SD fast enough despite the card having 60MB/s write speed.
The same kind of card but CF with 60MB/s has no problem.

You might try a faster SD card. I use 90MBps ones.


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Aug 29, 2014 10:11 as a reply to  @ archer1960's post |  #12

Cut your losses and buy a fast CF card.

I think you will be disappointed trying to adapt a SD card. Even if you could find an adapter, there is no guarantee that the SD card will perform at the stated rate.

Can you show me where it states the SD card slot is limited to 20Mbs when writing just to the SD card slot? I know Rob Galbraith stated ~19Mbs max, BUT he was writing to the CF card and the SD card at the same time. This causes the SD card to write slower. With just the SD card in the slot, this phenomenon does not exits.


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Traybor
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Aug 29, 2014 13:10 |  #13

I probably will have just buy a large/fast cf card as you've said since I can't get hold of a suitable adaptor anyway. :(
Reports I've read say that people don't get the native sd speed, but much faster than using the sd slot itself so it would do what I need, but I can't find anyone stocking them even though previously there have been a few made.

As for a link explaining this (I can see you don't believd me! Lol)

There's other topics on here that go into it in detail but just quickly googling it here's one article:
http://www.canonwatch.​com …with-the-eos-5d-mark-iii/ (external link)

Hope that helps


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Aug 29, 2014 13:22 |  #14

Traybor wrote in post #17124845 (external link)
I probably will have just buy a large/fast cf card as you've said since I can't get hold of a suitable adaptor anyway. :(
Reports I've read say that people don't get the native sd speed, but much faster than using the sd slot itself so it would do what I need, but I can't find anyone stocking them even though previously there have been a few made.

As for a link explaining this (I can see you don't believd me! Lol)

There's other topics on here that go into it in detail but just quickly googling it here's one article:
http://www.canonwatch.​com …with-the-eos-5d-mark-iii/ (external link)

Hope that helps

Hi
Sent you a pm if you want one - just pay the postage and you can have it free.
Latest generation of Sd/ Cf jacket. Apparently the fastest.


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SD (not micro) to CF adaptors to fit 5D3?
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