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Messages - alpicat

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Reverse Engineering / Re: UHS-I / SD cards investigation
« on: May 13, 2018, 08:24:50 PM »
Did you try any changes with adtg module to increase resolution? Big post and sure would take some time and fiddling to get it right.

I haven't tried any of this since I don't have any technical knowledge. However, will research this adtg module and see if I can understand it. Looks like there's quite a bit of info about it in the crop_rec on steriods thread. @theBilalFakhouri seemed to get quite far with this on his 700D, and wondering if what he discovered would also apply to the EOS M and 100D, since they're pretty similar cameras... although maybe this discussion is a bit off topic in this thread!

I have a question for you.  You mentioned the speed booster for increased view angle with EF-S lenses on APSC-sensor based mirrorless.  Would it be possible to use such speed boosters for the same purpose but with 1,6x crop sensor DSLRs operating in the LifeView (video recording) mode, with full-frame lenses, of course?  If not, why not?  And if yes, are such speed boosters available?  Sorry for the stupid question but I have never used and even seen a speed booster sofar.

If you're shooting with the full aps-c sensor area, adding a speed booster would give the EOS M the same effective field of view and DOF as a full frame sensor, whilst increasing the lens aperture by 1 stop. At the moment you can get cheap Chinese speed boosters on ebay which have poor optics and no electronic contacts. However, Viltrox told me in an email that they will be releasing a proper speed booster for EF-M mount in around 3 months or so. That's exciting. It'll turn the EOS M into a full frame camera.

Reverse Engineering / Re: UHS-I / SD cards investigation
« on: May 13, 2018, 12:31:37 PM »
Thanks @IDA_ML - your instructions on how to set this up on the 100D were really helpful and got me up and running on the EOS M.

I've also only tested the Sandisk extreme pro 95 MB/s on eos m and in my case haven't suffered a crash or any problems with footage yet, though I'm only shooting 24fps. Maybe for safety it would be nice to make a list of cards that work fine with this build... and recommend that those cards be used?

@Danne I agree it would be nice to focus on the 100D and eos m first. They're the cheaper cameras and people seem to be having success with them.

I'm particularly interested in the eos m because it's the only magic lantern camera on which we'll be able to use a speed booster soon (Viltrox seem to be planning to release a proper EF-M to EF focal reducer in the summer). That means that in 5x zoom mode, it will be possible to go wide angle using aps-c lenses + speed booster.

If we want to go further, in the "crop_rec on steroids" thread, @theBilalFakhouri spoke about bypassing the resolution limitation in the 5x zoom mode. See here:
Now with SD interface overclocking, reaching those higher resolutions seems more feasible? It would be nice to be able to shoot closer to 16:9 in 2.5k. He was testing on a 700D and one of the resolutions he was able to get working was 2520x1386 at 23.976fps, which sounds incredible.

Reverse Engineering / Re: UHS-I / SD cards investigation
« on: May 12, 2018, 09:43:36 PM »
I tried Danne's build from 17th April for the EOS M and it works nicely. I'm using a Sandisk extreme pro 95mb/s 64gb card, which goes up to 55 mb/s write speed max. Seems a bit low for this card but still allows continuous recording.

Here's a test video I've done with it:

Camera-specific Development / Re: Canon 50D
« on: March 31, 2018, 07:30:58 PM »
Thanks very much for confirming this issue, that's useful to know it's also a problem on the other oldest models. Wish I could help look into it but don't have any coding knowledge. Would be amazing to try fixing it since crop mode on the 50D is incredible, especially now that 12 or 10 bit recording is possible.

Camera-specific Development / Re: Canon 50D
« on: March 31, 2018, 03:28:34 PM »
The feedback I got was that 10bit is working on the 50D. The test build is still on my downloads page.

I've just tested this build - works very well. Thanks so much for this dfort. In crop mode I'm now able to record at the max allowable res of 1984x1078 continuously (or nearly so) in 12 bit raw. It's fully continuous in 10 bit.

As I mentioned in my post above (21st Jan), it's a shame I'm getting a grayscale preview in crop mode once I hit record (which turns pink when half pressing the shutter button). This is with "Canon" selected under preview options. At least it's a real-time preview that isn't pixelated like the other preview options. However I'm wondering if anyone else has this issue too, since I haven't seen it discussed anywhere. Maybe it's just my camera that has a problem?

Camera-specific Development / Re: Canon 50D
« on: January 28, 2018, 09:20:07 PM »
You can enable "Sticky half-shutter" setting which is located in Prefs->Misc key setting.

But in this case you need to start rec on, then half-press shutter once and you are good to go.
In order to stop rec, you need half-press first and then actually stop recording.

Feels tricky, but it is worth it, especially in combination with any gimbal.

Thanks I really appreciate that - it works very well for me, and makes the camera a lot easier to use!

Now just need to understand if it's possible to shoot in 1x1 crop mode without liveview going greyscale when hitting record, and pink when pressing the shutter button to activate IS. Does this happen to anyone else?

Camera-specific Development / Re: Canon 50D
« on: January 21, 2018, 02:45:25 PM »
Does anybody have an issue while recording RAW video on 50d - video recording stops and says "card file system error"?

I've never had an issue with raw on the 50D - although haven't tried recording for longer than 2 minutes. H.264 has given me some reliability issues though. I also use a CF Sandisk 64GB Extreme Pro 160MB/s

I like filming with the raw crop mode (1x1). However even with the preview option set to "Canon" (i.e. normal liveview x5 zoom framing), the display turns to grayscale as soon as I press record, which isn't bad (it's nicer than the slow framerate preview you get with the "ML Grayscale" setting), but it's a bit hard to use if trying to focus manually during recording. Wondering if anyone has been able to get round this issue? I've tried various nightly builds and all the menu settings I could think of.

Before recording - crop liveview in colour: 

During recording - turns to grayscale:

Also I use lenses with image stabilisation. and as far as I know on the 50D the only way to activate IS whilst recording video is to keep the shutter half pressed continuously whilst recording, without letting go. However, as soon as I half press the shutter whilst filming in crop mode, the display turns pink (again with the preview option set to "Canon").

Shutter half or fully pressed, pink liveview:

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