B+W 093 IR filter

[cto4cwh]

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A friend gave one suich filter to me recently, without telling me how to use it. Can I use it to take IR photography with M9P? Advices welcome. Thanks.

[jaapv]

It leads to very long exposure times. 092 is more suitable. The M8 will perform better with this filter. However, just try it out.

[cto4cwh]

Thanks for the response. So it's a case of trial and error?

[jaapv]

On the M9, certainly.

[farnz]

It works very well on the M8 and I have used it frequently to shoot handheld IR pictures with Voigtlander 35/1.2 Nokton and 21/2.8 Kobalux lenses wide open. The M8 has a weaker IR-stop filter over its sensor than the M9-P does, so expect to need to use a tripod and extended exposure times.

 

Please also note that IR rays focus on a different plane to those in the visible spectrum so you'll need to adjust for that when using an 093 filter. Some older lenses have a small red "R" on the focus ring to indicate the offset when shooting IR (focus as you would for visible light and adjust by the difference between R and infinity). If your lenses don't have an R then a rule of thumb is to place the infinity mark midway between the f/5.6 and f/8 marks. Trial and error will indicate the best position.

 

Pete.

[wda]

I bought such a filter which I use on my M8 with 50mm Summicron. While it is possible to handhold this combination, it does lead to high ISOs. My choice is to use a tripod.

 

My trial with my M9 was virtually a failure. Very little IR radiation reached the sensor. But try it; you might be surprised.

 

Also try it on any other digital camera you possess and which has a suitable lens for the size of the filter. Some digital compacts behave quite well, but only if you disengage autofocus and focus manually with above-mentioned adjustments to the focusing distance.

[farnz]

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To add to what David wrote, imho high ISO and IR just don't work very well; the results are what I'd describe as 'claggy' rather than grainy.

 

Pete.

[tobey bilek]

092 and M8 is best. 093 is more selective IR and works with the M8 with somewhat longer exposures, but they still can be hand held.

 

The M9 has stronger ir filtration built in so the IR/UV filters are not required to keep blacks black are get the rest of the colors correct. The downside is ir pictures are very difficult requiring very long exposures if you can obtain then at all.

[farnz]

092 and M8 is best. 093 is more selective IR and works with the M8 with somewhat longer exposures, but they still can be hand held. ...

It depends what you mean by 'best'. Personally I prefer the stark white foliage that the 'black' 093 produces as it stops all wavelengths up to 790 nm more the ability to produce faux colour IR and light grey foliage produced by the 'deep red' 092 that stops all wavelengths up to 680 nm. (For the OP's benefit visible light extends from 400 nm to 720 nm so the 092 allows some visible wavelengths at the red end of the spectrum to pass. The 093 stops all visible wavelengths)

 

Pete.

[cto4cwh]

Thanks. Can you post some shots for reference?

[jaapv]

http://www.l-camera-forum.com/leica-forum/leica-m8-forum/75371-m8-ir-how-get-best.html

 

093 filter on M8

 

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092 filter on M8

 

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[tobey bilek]

First off, WB off green sun lit foliage and save it.

 

Stark white is done with post processing, possibly levels or curves. Granted, out of the camera, the 093 makes a better pic.

[farnz]

Thanks. Can you post some shots for reference?

All with 093 on M8 with 21/2.8 Kobalux handheld.

 

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[stunsworth]

093 M8

 

You'll need to desaturate the images since they come out of the camera with a strong magenta caste.

 

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[cto4cwh]

Thanks. They are really great!

[jaapv]

093 M8

 

You'll need to desaturate the images since they come out of the camera with a strong magenta caste.

 

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I usually hit them with the mid-grey eyedropper tool.

If you do that on an area that is supposed to stay grey, it gives weird effects on an IR-UV pass filter.