SD Card selection Criteria

Basem Khawaja
Basem Khawaja used Ask the Experts™
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I would like to know if I am buying the right SD card for my DSLR Canon T3i. In the chart attached from Amazon it states that my CPU has to have 128GB of RAM. I only have 16 GB. Does that mean I will not be able to use the card to transfer content of the SD card onto my PC. Also what should I look for when buying a SD card? There are so many numbers on it . It gets confusing. Class 10 , The read/write speed, UHS class I, III. I just need something with large capacity and fast transfer to my PC . Also does the image quality of pictures or video depends on the camera it self and NOT the SD card. Please help me.

Thank you,

Basem Khawaja

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Commented:
There are lots of options, may want to review the Canon site to ensure the sd card will meet your needs:
https://support.usa.canon.com/kb/index?page=content&id=ART111360&cat=5169B&actp=LIST
Top Expert 2016

Commented:
You don't need 128 MB of random access memory (RAM) in your computer.
SD stands for "Secure Digital", SDHC stands for "Secure Digital High Capacity", SHXC stands for "Secure Digital eXtended Capacity".
From the names the only thing you can tell is the difference i.e. storage capacity.
SDHC cards offers between 4GB to 32GB and SDXC offers more than 32GB.

There is no difference in the quality or security or speed. The transfer speed depends on the "CLASS" of the card mentioned on it and not on whether it is a SDHC card or SDXC. All, SD, SDHC and SDXC are available in various CLASS ranging from 2 to 10.
CLASS 2 represents 2MB/s transfer speed and so on.

The camera itself will use any SD card you can buy..  Suggest Class 10 (100MB/s) or higher.  Save the pictures on the camera as RAW images and either/or buy larger cards or more cards as the files will be very large as compared to if you store them as jpeg (lossy compression)  You can enlarge a RAW file keeping excellent quality where jpeg's will start to show artifacts at more than the saved dimensions.
if you want to transfer your photos to your PC via wi-fi, you may be able to use an eye-fi card. but CHECK CARD in camera before purchasing:
How to use an Eye-Fi card in the EOS Rebel T3i.

Note:
The camera is not guaranteed to support Eye-Fi card functions (including wireless transfer). In case of an issue with an Eye-Fi card, please check with the card manufacturer...

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Basem KhawajaClinical Pharmacist

Author

Commented:
David

Thank you for your detailed and easy to understand reply. You stated "You don't need 128 MB of random access memory (RAM) in your computer". The chart says 128 GB{GIGABYTES} . Do you think that was a typo? I have not seen on most PC's a RAM that big!!!Second, I have not seen any class higher than class 10. But in case I do locate one that is higher, Will the sole advantage of that being higher is faster transfer(READ) speed when copying to my PC. Lastly, when saving images as RAW since it takes up more space on the SD card , do you think 128GB SD card should be sufficient and once it gets full I can always transfer the images to my PC.
Thank you David.
Top Expert 2016
Commented:
My mistake the 128 GB is the amount of storage on the card not the amount of ram in your computer
Class 10 that is probably the fastest per class .. in your picture you show some that are faster .. and more expensive.
Is 128GB sufficient.. I would carry a couple and label them i.e. #1, #2, #3
What is sufficient for you may not be sufficient for me.. I tend to take several exposures of the same image/scene Different F stops, filters, lenses. If you don't take the picture it is lost forever. you and do as I do and cull the ones I don't like/want.
Basem KhawajaClinical Pharmacist

Author

Commented:
David

I am sorry but the chart specifically lists 128GB for the Computer Memory Size and 128GB for the Memory Storage Capacity. So once again do you think that was a typo on Amazon's part? I have 16GB of RAM. Do you think that should be sufficient for any of these cards? Second, All the SD cards in the chart do have different transfer(READ) speed . However they all have Class 10 rating. So is the Class 10 related to speed or something else?

Thank you David.
Top Expert 2014

Commented:
The "computer memory size" must be an error on Amazon's part, if you google for "sd card" and "computer memory size" the only hits are on Amazon. They have put a meaningless field on the webpage and vendors have to put something in it.
Basem KhawajaClinical Pharmacist

Author

Commented:
Andyalder

So is it safe to say then any of the cards listed in the chart I posted will be safe to use on my PC with 16GB RAM?
Top Expert 2016

Commented:
Yes any one of them will work.
Top Expert 2014

Commented:
Assuming you put it in an SD card reader then yes it should work, if you force it into a DIMM slot things may get a bit lively. The amount of RAM you have is irrelevant. that is an error on Amazon's part probably because they started their database based on book sales.
Basem KhawajaClinical Pharmacist

Author

Commented:
Thank you Experts.

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