Author Topic: Canon 50D  (Read 432298 times)

Walter Schulz

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Re: Canon 50D
« Reply #775 on: May 16, 2020, 11:30:03 PM »
FOV is changing, not focal length. You can't change lens' optics by cropping.

FOV = 2 arctan 18 mm / (focal length * crop factor)

And if you're asking about an object for a given distance in regard of focal length you have to include object dimensions into calculation:

Object width/Distance = 36 mm / (focal length * crop factor)

Disclaimer: Calculations are exact for focus distance = infinity only. Standard lenses do change focal length if focus distance is shorter.
Photogs and videographers: Assist in proof reading upcoming in-camera help!. Your input is wanted and needed!

iliush

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Re: Canon 50D
« Reply #776 on: May 16, 2020, 11:44:41 PM »
Crop, it means that just a portion of senzor is used, but the optics and dof remain the same. In crop mode you will see just the had of the "dog", but is the same had, of the whole "dog" this time, you see when shoot full frame of your camera.

jma6610

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Re: Canon 50D
« Reply #777 on: May 24, 2020, 12:09:03 PM »
I'm hoping that someone can tell me whether there is a way that I can use my Canon EOS 50D as a USB connected webcam or use it for HDMI video output (preferably) I don't really need it to record video in the camera. I need to do this with a Windows 10 machine. I see that you can use Camera Live and Cam Twist to do this, but Cam Twist will only run on a Mac. Can Magic Lantern do this, or is it only for recording video within the camera? The Canon EOS 50D does have hdmi output, but this is apparently only for playback and not continuous video.  Thanks in advance.

Walter Schulz

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Re: Canon 50D
« Reply #778 on: May 24, 2020, 07:14:46 PM »
You can use EOS Webcam Utility via USB or any HDMI capture device in liveview mode.
Photogs and videographers: Assist in proof reading upcoming in-camera help!. Your input is wanted and needed!

Wlad81

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Re: Canon 50D
« Reply #779 on: May 24, 2020, 10:34:23 PM »
Is my battery for 50D is weak, or is it true that 50D dries out the fully loaded battery very quickly (3 or 5 seconds) when shooting video?

And how can I change the shutter angle? I can't do it.

Walter Schulz

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Re: Canon 50D
« Reply #780 on: May 24, 2020, 10:42:01 PM »
You can't drain a fully loaded battery in 5 seconds.
1.390 Ah -> 1.390 A for 1 h -> 720 x 1.390 A in 5 seconds? No way!
Photogs and videographers: Assist in proof reading upcoming in-camera help!. Your input is wanted and needed!

Wlad81

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Re: Canon 50D
« Reply #781 on: May 24, 2020, 10:48:27 PM »
Does this mean that the battery is just weak?

And what about the shutter angle? I can't change it in LiveView mode. It's always at 330o.

Walter Schulz

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Re: Canon 50D
« Reply #782 on: May 24, 2020, 10:52:30 PM »
Does this mean that the battery is just weak?

It means it is dead.
Photogs and videographers: Assist in proof reading upcoming in-camera help!. Your input is wanted and needed!

Wlad81

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Re: Canon 50D
« Reply #783 on: May 24, 2020, 11:27:11 PM »
There is also an issue with the frame rate of h.264 videos. It's always 30fps, and I cannot change it in either video editor. What am I to do?

reddeercity

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Re: Canon 50D
« Reply #784 on: May 26, 2020, 07:07:27 AM »
go to "Frame Override" Tab and set to "Exact FPS" then dial in the desired frame rate e.g. 23.976 from 30.00 etc. ...
the default Liveview frame rate on the 50D is 30.00fps.

Wlad81

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Re: Canon 50D
« Reply #785 on: May 26, 2020, 12:11:19 PM »
I can't find "Exact fps" on this tab. I'm using crop_rec-3744x1080_24fps_50D-eXperimental.4.57pm.2020May06.50D109.

reddeercity

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Re: Canon 50D
« Reply #786 on: May 27, 2020, 06:24:25 AM »
You need to enable it with the set button , there's a drop down menu in "Optimize for" etc. ....
 

Also enable Expo. Override , to get proper shutter angle .



Wlad81

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Re: Canon 50D
« Reply #787 on: May 27, 2020, 12:12:51 PM »
Thanks a lot, everything works now!

It's a pity that I don't have VAF-50D filter for now. I've made tests with raw today, just color graded in MLV App, please, look at it. Added some sharpness (50), clarity, vibrance, saturation (20), filter "Film E100" (50). Shot in 1568x882 10bit, as I have only Transcend 32 GB 133x CF now. Upscaled to 1920x1080. Lens are Canon EF-S 18-55 IS STM. Sorry, no tripod here. What is your opinion on aliasing, is it quite heavy?

https://yadi.sk/i/PqYrSpB8JAsigQ
https://yadi.sk/i/UkateXdzcu7pdA
https://yadi.sk/i/h6wnHaP0c7DTeQ
https://yadi.sk/i/F9kfKsgoVo_xpg
https://yadi.sk/i/CRT-kBTRBwBWuA
https://yadi.sk/i/q9vlBLbngdxqjA
https://yadi.sk/i/3ZTUiwWGwPo7_Q
https://yadi.sk/i/7DkWnMoy79S2jw

There are other tests, with flowers, and there is no visible aliasing.

Wlad81

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Re: Canon 50D
« Reply #788 on: June 04, 2020, 11:17:49 PM »
By the way, crop_rec doesn't work, all the camera shows in this mode is the stripes. What am I to do?

Also, the overexposed areas becomes pink, and I don't know how to grade it. Set the Raw White Level to 200-250 less, set the Highlight Reconstruction and Cyan Highlight Fix, nothing helps too much. Maybe the 12 and 14 bit modes would help?