Unsuccessful

[chjing]

hi, can anyone who has successfully done IR shot tell me the exposure level that has to be used?

[TrailsofLife]

What camera you used?

Today's weather is quite cloudy.

Theres no standard exposure settings. Its all try and error.

[teerex]

Originally Posted by chjing hi, can anyone who has successfully done IR shot tell me the exposure level that has to be used?

What are your problems? What sort of results are you getting? Your camera used?, etc.

Telling you what exposures used will not be sufficient for you to get a IR pic. Exposure also depend on aperture used.

If you could elaborate more on what your problems are, there will be someone who could give you answers.

[TrailsofLife]

From your past threads, you used a 350D I supposed.

First, set your Custom WB.


Try ISO 800, f4, 30secs.
Compose without filter first. On a tripod.
Once satisfied with composition, press shutter for AF. Once camera beep, switch lens to manual focus. Dun touch lens focussing anymore.
Put on filter, shoot.
If still blackout, switch to Bulb or B mode, press shutter and hold for 45secs.
If still blackout, press shutter and hold for 1 minute.

Keep adding more exposure time until you get an image out of your camera.

[chjing]

yes. my shots were too dark even on sunny day. if shoot evening scenery, its total black. even if you use photoshop, is still too dark or black. all shots were used shutter 30". maximum already. cos i read that some of you can take shot just using few seconds. how to do it?

[regit]

Originally Posted by chjing yes. my shots were too dark even on sunny day. if shoot evening scenery, its total black. even if you use photoshop, is still too dark or black. all shots were used shutter 30". maximum already. cos i read that some of you can take shot just using few seconds. how to do it?

Firstly, different sensor response differently to IR. This is further complicated by the strength of the IR-cut filter placed in front of the sensor.

Imagine having a 64x ND filter attached to the lens... not much can be captured using a short exposure. Conversely, if you removed the filter, the sensitivity will increase. This is the same principle with IR.

Many in this forum actually modified their cameras by removing the IR-Cut filter to increase the sensitivity to IR and therefore able to use a shorter exposure. Max recently mod his Canon, maybe he can shed some light regarding this operation.

[TrailsofLife]

Originally Posted by chjing yes. my shots were too dark even on sunny day. if shoot evening scenery, its total black. even if you use photoshop, is still too dark or black. all shots were used shutter 30". maximum already. cos i read that some of you can take shot just using few seconds. how to do it?

Use B mode to extend the exposure. I knew of people who use 350D to shoot IR. No problem at all, average of 15-30secs exposure.

Obviously, your image is very underexposed from what you described.

Also, you need to understand exposure and the relation between ISO, shutterspeed and aperture. How they work together to get correct exposure.

Why dun you try maximum ISO, widest aperture and 30secs shutterspeed? Also, shoot in RAW so you can correct exposure on computer, I believe by 2 extra stops. what lens did you used by the way?

You need to get correct exposure before even working in PS.

[chjing]

Thanks. i am using sigma 17-70mm f/2.8

[TrailsofLife]

Originally Posted by chjing Thanks. i am using sigma 17-70mm f/2.8

Ok, shoot at f2.8 then. Also, shoot in manual mode so you can have full control. I believe you can get a shot out of your camera.

[teerex]

Chjing,

I have closed your other thread pertaining to the same query for assistance on IR on the Canon 350D.

Confine your queries to one thread so that anyone responding to you do not have to go to multiple threads. This may also be of help for others who are facing similar problem as you to keep track.

Need to keep this sub-forum clean. Thanks for your understanding.

[TrailsofLife]

Hi chjing,

Understand the way your camera work first. Shouldn't be that hard. If you want to use AV mode and depend on camera's meter, you should cover the viewfinder when taking a metering.