Another attempt at Infrared on the M8

[Nick De Marco]

I hope this one is a bit better than the last attempt



Using 18mm Zeiss lens and BW IR filter

[DaveB]

It's a real thrill to have an unmodified digital camera that can shoot IR hand held.

When combined with these easy to focus wide angle lenses it's particulary convenient.

I enjoy shooting IR when the sun is high, the shadows harsh, and conditions are otherwise not optimal for photography. It gives me something to do while waiting for the golden hour.

[ernesto]

How do you switch the camera to infrared?
Do you really need the filter?
(trying to understand Infrared Digital)

Ernesto

[Nick De Marco]

Ernesto, with the M8 you don't need to switch to anything (although you might want to take in B&W so you can preview but it is not necessary).
Yes you need a filter, and preferably a proper IR one that costs more than 50 pounds for a decent result

[ernesto]

Originally Posted by Nick De Marco

Ernesto, with the M8 you don't need to switch to anything (although you might want to take in B&W so you can preview but it is not necessary).
Yes you need a filter, and preferably a proper IR one that costs more than 50 pounds for a decent result

Nick, Does this means that the M8 is sees infrared light anytime?
Even when you take normal pitures?

Ernesto

[Nick De Marco]

Someone with better technical know;edge than m should be able to explain, but my understanding is that the M8 has very high IR sensitivity when taking 'normal pictures'. This is one of the reasons you sometimes have to put a UV/IR filter on the lens so that black does not become pure (I believe). The advantage is the camera is ideal for pure IR photography by adding a pure IR filter

[hr1]

I'd love to know how to take infra red images - I have B+W uv/ir filters - are these what you're referring to?

[Nick De Marco]

You need a dedicated 'true' IR filter. Here is an article about it

http://www.luminous-landscape.com/re...infrared.shtml

[jaapv]

These are true IR images in B&W , using a 092 filter, which actually lets a miniscule amount of visible light through as well in the low end of the spectrum. For total blocking of visible light you need a 093 filter.








And thid is how one uses that rest of visible light, to make colour IR images:

[spyder2000]

Truth is many cameras are sensitive in the IR region. To see the IR effect, you need to add an 87C filter to the lens. This removes the visible spectrum and passes IR.

One way to check your camera for IR is to point your tv remote control at the camera, and while viewing the image on the chimp screen, press the buttons on the tv remote. You'll see the remote's transmitter flash. This doesn't guarantee good photographic results but it does indicate you have a camera that is sensitive in the IR spectrum and is not filetered internally.

I have a Canon G2. It makes great IR images. I also have a Kodak Easy Share. Results there are spotty at best. I guess this paragraph makes me OT.

[jaapv]

I just had a look at the Reichmann article. There is one error in there. He says "there is no IR focus mark, so I had to stop down to f 11" That is nonsense. The focus mark is identical, on non-apo lenses, with the 5.6 DOF mark. Plus, IR is generally used for landscape photography. What harm does focus bracketing do? I usuall shoot at 5.6 or 4.0 and run through a progressive focus series.

[wstotler]

Originally Posted by jaapv

I usuall shooty at 5.6 or 4.0 and run through a progressive focus series.

Personally, I've been shooting at f/2. I, too, have read the "stop down to f/11 or f/16" regarding IR photography--not just in the Luminous Landscape article--but I haven't been heeding that. Nailing focus is difficult so I have been focus bracketing, also. Five shots, focus bracketed, usually yields one good one. (When I'm shooting closer than infinity.) I'm getting better, though.

[jaapv]

Originally Posted by ernesto

Nick, Does this means that the M8 is sees infrared light anytime?
Even when you take normal pitures?

Ernesto

Yes, that is exactly what all the magenta hoohah was about.

[Brian Sweeney]

The older Summicrons (collapsible, type I Rigid) are extremely well corrected for color, and the IR index is within the F2.8 DOF marks.

I've used inexpensive Kodak Wratten Filters for IR work before. We're talking $2 at camera shows for an 87c or 88a.

[DaveB]

I like the 15mm CV for IR because it makes focusing almost a non-issue.