Best SD card for Canon EOS M + Magic Lantern

[wyup]

64GB one. According to specs is up to 90 MB/s write and 200 MB/s read speed. Write speed spec is the same in theory as the 170 MB/s one.

Is actual M crop_rec build tweaked to 'golden standard' 170MB/s card?

[Walter Schulz]

I actually don't know! What we know: There is no way to predict how any card type will react to ML's overclocking method.
So referring to any spec is not valid.
EDIT: I wouldn't be surprised if 256 GB, 400 GB, 512 GB, 1 TB varieties showed different results. They are specified R200/W140.

Yesterday I did some tests with Extreme Pro and Extreme Plus R170/W90. They perform quite the same and allowed transfer rates above 70 MByte/s. Didn't test "anamorphic" modes, though.
Samsung PRO Plus R160/W120 performed well in benchmark but really sucks trying to record with overclocking and higher transfer rates.

[gabriielangel]

I did. it doesn't make any difference. It ramps to 61-62 Mb/s briefly only to stop recording after 2-3-4 seconds.
Both hacks enabled, 2.8k Bit depth off.

at 2.8k, you won't get long clips at 14 bits. 10 bits will get you close to continuous and 12 bits will give you about 20-30 seconds. You can get more by underexposing the image and/or moving the camera slowly.

[Danne]

Actually, the latest hacks from thebilalfakhouri actually makes 2.8k continuous. Maybe even with 14 bits?

[gabriielangel]

I tried last weekend, but I could not get it to record continuously under the sun (Wiith some shade, I got continuous at 10 bits) If you enable lvface+aewb, you're right, you'll get continuous at 12 bits, but you cannot use shutter fine tuning.

I reported the subtleties in this post: https://www.magiclantern.fm/forum/index.php?topic=26443.msg238437#msg238437

I will post some samples when I get time off, but when the exposure and focus are done right, 2.5k gives you  reliability and plenty of satisfaction

p.s. I haven't benchmarked your latest (August 04 2022) build though. I did not see it in the commits, but did you add speed mods compared to the last build?

[gabriielangel]

Did this crop_rec_4k_mlv_snd_raw_only_2022Jul31.EOSM202.zip work for you?

Did anyone get 70 MB/s write speed now on EOS M?

I'm a little late here, but here are my eosm bench results using the aforementioned build.


With the lvface hack, I can get about 30 seconds at 12 bits, histogram showing 1.8 and even exposure (Sandisk Extreme pro 170 MB/s, 128 GB)

[Leszek Wysocki]

I know that not in the topic, but maybe someone will be interested. A few days ago I bought a SANDISK Extreme Pro SDXC 512 GB card on the Polish portal - SDSDXXY-512G-GN4IN for 60$ (279PLN). I tested it in a laptop reader and the transfers are the same as in SANDISK Extreme Pro SDXC 256 GB (purchased by me earlier in the official distribution). I also tested it in 5Dmk3 and with 240MHz settings in the record it has ~ 95 MB / s (analogous to the 256 GB version). The seller declares 14 days for a return and a two-year warranty (I assume that only in Poland, because we have such domestic regulations). I am not related to the seller in any way and I do not have any profit from this entry.

https://allegro.pl/oferta/karta-sdxc-sandisk-extreme-pro-512-gb-170mb-s-12543428724