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Canon IXUS 145 (=ELPH135): which SD card should I select (data transfer rate) ?

Hello,

I am not sure which SD card to buy for a Canon IXUS 145 compact camera. The camera is also known under the brand Canon ELPH135.
The seller recommends SD or SDHC or SDXC. A test report tells me the battery is empty after 2 hours of high resolution filming, so I guess more than 8 GB make no sense. But which speed should the SD card have ? It makes no sense having a speed much higher than the camera hardware supports, but on theother hand I do not want that the camera compresses my movies just because else the SD writing speed is too low. So what writing speed should I look for ?

- Sonja
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best Michael & LHerrou

thanks for your advice. And what would happen if my card is too slow for a movie ? Would then the camera compress too much, or would it just skip a few images of the movie (meaning: the camera produces less than ideal movies without telling me about the problem), or would it produce an error message ?

- Sonja
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LHerrou & Michael-Best,

thank you both for your advice !

yours, Sonja
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Hi Michael-Best,

so your experience with cheap SD cards is rather in opposition to your statement that I will get an error in case the sd card is too slow. Of course the aim is not to safe 2 $, but first to understand the behaviour of the camera, together with unsuitable sd cards.

- Sonja
Out of the use of over 40 SD cards I have had 2 with "weak contacts"
They were cheap = on sale, although all my SD cards came with a "lifetime guarantee" it has no point if photos or video has been lost (SD card purchase receipts lost, too ...)

I may have provided too many variables to your original question.

I wish to clarify that:

Your SD card must be faster than your camera unless you are using a more expensive camera with a data buffer memory.
The use of a slow SD card in fast camera is asking for failure of video & or photo capture.
Thanks