Author Topic: 7D NOISE PROBLEM  (Read 6699 times)

yasinvfx

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7D NOISE PROBLEM
« on: February 19, 2014, 12:06:53 AM »
7D and  2014-02-18 Night Builds

RAW VIDEO 1280x720

1/48
ISO 800
f 4.0
KINGSTON 600x ultimate 16 GB CF Card

MY DNG FILE ((FIRST FRAME))
000000.dng

my videos very grainy. HELP ME.!

a1ex

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Re: 7D NOISE PROBLEM
« Reply #1 on: February 19, 2014, 12:21:09 AM »

yasinvfx

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Re: 7D NOISE PROBLEM
« Reply #2 on: February 19, 2014, 12:28:16 AM »
Try f1.4.

No no..
My lens is 24-105 f.4.0 L

Frank7D

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Re: 7D NOISE PROBLEM
« Reply #3 on: February 19, 2014, 06:47:25 AM »
Get a faster lens
OR
use more light
OR
use noise reduction software in post

naturalsound

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Re: 7D NOISE PROBLEM
« Reply #4 on: February 19, 2014, 08:35:48 AM »
You can gain one stop of light by overriding the shutter speed to 1/25sec. (But be aware of some motion-blur)
Try to expose such that the highlights are just below clipping (RAW-Histogram).
I tend to use ETTR on the brightest Part of my Scene to optimize exposure before each shot.

For Noise-Reduction NeatVideo works great. It uses also temporal filtering so you do not loose as much detail as by just the ACR Noise reduction. But the differences are not huge.

Audionut

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Re: 7D NOISE PROBLEM
« Reply #5 on: February 19, 2014, 08:42:11 AM »
ISO 800 is the last useful ISO on the 7D.  So unless you can increase exposure (through shutter/aperture/scene luminance), then your SOOL.

hdclip

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Re: 7D NOISE PROBLEM
« Reply #6 on: February 19, 2014, 11:18:38 AM »
ISO 800 is the last useful ISO on the 7D.  So unless you can increase exposure (through shutter/aperture/scene luminance), then your SOOL.

Very interesting Link!!!!! thank,s
Canon 7D Sandisk Extreme 60MB/seg, Lexar 32Gb X1000

yasinvfx

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Re: 7D NOISE PROBLEM
« Reply #7 on: February 19, 2014, 11:31:06 AM »
MY OUTDOOR TEST

ISO 100
f9.9
1/48

were corrected with the CAMERA RAW


Stedda

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Re: 7D NOISE PROBLEM
« Reply #8 on: February 19, 2014, 01:51:42 PM »
I agree I never used anything above ISO 800/1250 on my 7D.... and in your last picture besides the fact the not a single thing is in focus I see no noise.
5D Mark III -- 7D   SOLD -- EOS M 22mm 18-55mm STM -- Fuji X-T1 18-55 F2.8-F4 & 35 F1.4
Canon Glass   100L F2.8 IS -- 70-200L F4 -- 135L F2 -- 85 F1.8 -- 17-40L --  40 F2.8 -- 35 F2 IS  Sigma Glass  120-300 F2.8 OS -- 50 F1.4 -- 85 F1.4  Tamron Glass   24-70 2.8 VC   600EX-RT X3

Audionut

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Re: 7D NOISE PROBLEM
« Reply #9 on: February 20, 2014, 06:37:40 AM »
1250 is a digital push of 800.  So in this case, it's probably better to do the digital push in post so that you retain the 1/3 stop highlight detail.
When it's pushed digitally in camera, it simply clips the top end.

and in your last picture besides the fact the not a single thing is in focus I see no noise.

On this point, noise helps to increase the perceived sharpness of detail.  Where there is lack of detail, such as in areas of the frame that are out of focus, the noise becomes entirely problematic.

@yasinvfx
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