Raw Video true HD 1:1 pixel for planetary astronomy

[IBIRRU]

Dear all,

I'm very grateful to the magic lantern developers 

It reveals a new way to take planetary video.
Nowadays a dedicated 12 bit video camera for planetary astronomy could be quite expensive and required a computer with fast usb2 or usb3.

A huge step up compared to 8 bit compressed video from camera (640x480 60 fps 550D, 60D) or using PC software to grab live view in 5x (crop) mode.

After loaded magic lantern nightly build and activated the 14 bit raw module on my 500D I'm able to record in 5x zoom mode lots of different size frame at true 1:1 pixel resolution, the only one useful for planetary video.

I have a 32 Gb SD SanDisk Extreme 45 Mb/s (do not use Sony SDHC UHS-I 94 Mb/s, it's slow!)

The 1:1 pixel 14 bit raw frame I got (I compare them with CR2 frames) was:

Continuous video (max 4 Gb) - However in planetary astronomy is not important to record continuous video, 1000 to 2000 frames is enough.

640x480        22 fps   OK
704x470        22 fps   OK
960x480        22 fps   OK
1280x480       18 fps   OK
1344x504       17 fps    OK  (1000 frames =1.1 Gb)
------------------------------------------------------------------
1152x490       22 fps OK but just 1100 frames (19.1 Mb/s)
1344x504    22 fps OK but just 300 frames

In 5x mode (1:1 pixel) the VERTICAL limit seems 510 pixels (is it an hardware limit?).
If I try to set a vertical resolution > 510 the frames was corrupted.

I'M INTERESTED TO KNOW ABOUT OTHERS CAMERA PERFORMANCE IN 5X MODE

Can them get larger size frames or faster fps?

[1%]

Other cameras?

Right now, didn't clear card
7D - 2.5K x 1200 ~ 4-5 seconds 23.976
7D - 2048 X 1024 ~ 2k (10x), 1.5K frames 5X
7D - 2.5K x 1200 ~ continuous at 16 FPS

50D
2K x 1K - continuous 5x 23.976

[RenatoPhoto]

5D3 using Lexar Pro 1000X

1920x1080 at 29.97 fps continuous
2048x1152 at 25 fps continuous
2240x1260 at 23.97 fps 700 frames
2240x1260 at 22 fps continuous
2560x1320 at 19 fps continuos
2880x1320 at 17 fps continuous
3584x1320 at 13 fps contuous

And when RAW format 2.0 is working for spanning the raw video to SD and CF card you can record 15-20% faster.

[Kharak]

and the 5x Zoom mode is actually a 3.0 crop factor. FYI

Just so you don't multiply focal lengths with 5x in the future.

or perhaps I'm wrong regarding the 500D?

[IBIRRU]

Yes
I use the term 5x not related to the FL but only to point out that we need to press the 5x zoom button and see "5x" on the live view.
I don't use the term "crop factor" because  is related to the actual horizontal resolution and then is variable.

Jupiter with 3÷7 m of focal lenght stays quite well in 640x480 pixel frame (crop factor 7.4) but we need a very high fps to avoid blurring caused by planet rotation when we stack all the frames.

640x480 is useless for normal daily life

What is necessary is to get a 1:1 sensor pixel frame.

5D3 or 7D are quite expensive and also heavy and stay in my dreams

50D coud be a good target (it has CF)

There is someone that has a 600D or 650D that could try the max size frame and fps at 5x?
Could these cameras get 1024x1024 at 30 or more fps?

Is just the 500D that freeze the live view during recording raw video or there are others camera?
Is just the 500D that hangs when try to review (playback) the recorded raw video?

However live view freezing In astrophotography is not a big problem (the subject has to stay immobile).

[Letni]

I've tried it just with the 650D, and I'm at 1:1 resolution to 960x960 at 24 fps = 36.9 MB / s