Exposure Question

[Perry Wilson]

SO i am indoors and have my ISO at 200, my shutter at 1/50 and my glass stopped all the way down at 3.5... and it is still a bit dark, but... I dont want to change any settings... I heard someone talking about an exposure compensation of some sort... is this true is there a way to raise my AE in 1080/24 movie mode and if it is please explain thanks

 

[dvollrath]

I think you're asking for an awful lot there. It's not surprising that those settings don't give you enough light indoors. Just raise the ISO to get what you want or add more light.

 

[Kholi]

SO i am indoors and have my ISO at 200, my shutter at 1/50 and my glass stopped all the way down at 3.5... and it is still a bit dark, but... I dont want to change any settings... I heard someone talking about an exposure compensation of some sort... is this true is there a way to raise my AE in 1080/24 movie mode and if it is please explain thanks

A) ISO 200 is noisier than 320. So the first thing you need to do is... change your settings.

B) 3.5 is not stopped all the way down. If that's your widest aperture than you're "Wide Open".

C) Do not use any camera processing tricks to achieve proper exposure: use light.

D) If there isn't much movement there's nothing wrong with shooting 1/40 for an extra spittle. No one will notice it.

E) Make sure what you're seeing is what you're getting: your LCD brightness setting may be off.

 

[dvollrath]

A) ISO 200 is noisier than 320. So the first thing you need to do is... change your settings.

I remember reading somewhere on this forum that increasing the noise off the sensor with a higher iso causes the compression to improve and reduce banding, but has there been any definitive tests. As far as I can tell, my camera looks best at 100. I have trouble buying into the notion that 200 is noisier than 320.

 

[Kholi]

I remember reading somewhere on this forum that increasing the noise off the sensor with a higher iso causes the compression to improve and reduce banding, but has there been any definitive tests. As far as I can tell, my camera looks best at 100. I have trouble buying into the notion that 200 is noisier than 320.

All you have to do is shoot 320 and 200. Not only is it obvious there but obvious here:

ISO/Noise tests. 1080/24p, lens cap on. In FCP, native format, maxed the mids, applied same filter to every clip. Large video version is uploading.. Handheld, skewtastic footage to come..

 

[Kholi]

In addition to that, increasing noise to better compression sounds nonsensical to me. Noise may reduce the appearance of banding but you can so that in post.

 

[dvollrath]

Wow thanks for that. That'll help out a lot.

 

[Perry Wilson]

Thanks guys I am new to this whole DSLR thing what should my LCD brightness be to be most accurate.

 

[visugeek]

Kholi,

Thanks for posting that, I hadn't seen that yet. Wow, that is such a huge difference in settings, the 7D really does have a very sweet spot!

 

[Taylor Rudd]

For optimal image quality (sounds kind of funny when talking about the 7D) use an ISO native to the sensor.

160, 320, 640 and 1250.

 

[Cranky]

Any explanation of why ISO200 is noisier than ISO320?

 

[David G. Smith]

For optimal image quality (sounds kind of funny when talking about the 7D) use an ISO native to the sensor.

160, 320, 640 and 1250.

So there are multiple native ISOs for a sensor? Is this just what is posted for this particular camera or is this a feature of CMOS chips in general? Would you have any links with more info on that?

Thanks,

 

[Perry Wilson]

hey is there a way to keep my lens open to say f/4 and shoot at 1/50 at iso 160 and not have it over exposed when shooting outside... Today I noticed when I was shooting at 100 ISO that I had to stop my lens down all the way to 22 or raise my shutter speed to 1/1000 I wanted the shallow depth so I shot at 1/1000 and the footage didnt look right by the way I was shooting 1080/24 so usually I would be shooting 1/48 on my XHA1s... suggestions?

 

[mhood]

Fader ND

 

[Perry Wilson]

yeah that is a good idea didnt think of that... any good ones you know off I need a 72mm lol nevrmind I see that is a link thanks

 

[cl516]

regarding 160, 320, 640,
i assume the recent Firmware Update does not alter this in anyway...?