Infrared help please

daveyuk · 03-08-2005, 10:24

Guys
Please help I'm using the Cokin A007 infrared filter with my Finepix S7000 as I'm not sure weather it works with my 300/350D. Anyhow I've had a play around and uploaded them on to my pc they seem somewhat red, even though I push them through the channel mixer and bring them down to mono they don't look right.

Am I doing something stupid or am I missing something out?

Many thanks in advance

David

Gandhi · 09-08-2005, 23:47

not done any infrared yet but as far as I'm aware there are several factors that cause problems
1) the camera has a filter over the sensor to cut out infrared light as it can interfere with some ccd's
2) it may be the frequency of light that the filter is cutting out, it may not drop enough visible light to produce a true infrared effect.
3) Did you take a custom white balance reading off a piece of white paer before shooting?

this webby should help though, pretty informative.....

http://www.wrotniak.net/photo/infrared/#POST

wez130 · 10-08-2005, 09:09

gogle 'brads IR action' for photoshop and use that

daveyuk · 11-08-2005, 10:36

Thanks for the replies gents all info most welcome.

Steep · 11-08-2005, 19:58

With the 350D the main thing is to use a lens that is compatible with the filter. Some have a coating on them that gives you hotspots (overexposed) in the center of your images. The kit lens is one of the unsuitable ones but others like the 50mm f1.8 and the sigma 70-300 zoom are fine.

daveyuk · 11-08-2005, 21:22

Cheer steep thanks for the heads up on lenses.

03-08-2005, 10:24	#1 (permalink)
daveyuk Forum Regular Join Date: Jul 2005 Location: Berkshire Posts: 1,150	Infrared help please Guys Please help I'm using the Cokin A007 infrared filter with my Finepix S7000 as I'm not sure weather it works with my 300/350D. Anyhow I've had a play around and uploaded them on to my pc they seem somewhat red, even though I push them through the channel mixer and bring them down to mono they don't look right. Am I doing something stupid or am I missing something out? Many thanks in advance David

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09-08-2005, 23:47	#2 (permalink)
Gandhi Forum Regular Join Date: Jul 2005 Location: bath, somerserset Posts: 966	not done any infrared yet but as far as I'm aware there are several factors that cause problems 1) the camera has a filter over the sensor to cut out infrared light as it can interfere with some ccd's 2) it may be the frequency of light that the filter is cutting out, it may not drop enough visible light to produce a true infrared effect. 3) Did you take a custom white balance reading off a piece of white paer before shooting? this webby should help though, pretty informative..... http://www.wrotniak.net/photo/infrared/#POST

10-08-2005, 09:09	#3 (permalink)
wez130 Getting Comfy Join Date: Jul 2005 Posts: 136	gogle 'brads IR action' for photoshop and use that

11-08-2005, 10:36	#4 (permalink)
daveyuk Forum Regular Join Date: Jul 2005 Location: Berkshire Posts: 1,150	Thanks for the replies gents all info most welcome.

11-08-2005, 19:58	#5 (permalink)
Steep Forum Regular Join Date: Jan 2005 Location: Inverness Posts: 964	With the 350D the main thing is to use a lens that is compatible with the filter. Some have a coating on them that gives you hotspots (overexposed) in the center of your images. The kit lens is one of the unsuitable ones but others like the 50mm f1.8 and the sigma 70-300 zoom are fine.

11-08-2005, 21:22	#6 (permalink)
daveyuk Forum Regular Join Date: Jul 2005 Location: Berkshire Posts: 1,150	Cheer steep thanks for the heads up on lenses.