My IR lesson today.

[gtmerideth]

Advertisement (gone after registration)

Being bored with winter I visited my local botanic gardens tropical flora green house today.

Below is a first test shot and was I suprised. I guess they grow IR in the greenhouse as well a green leaf plants. I've been thinking that the cut filter wasn't very desireable since I upgraded to 1.09. Wrong.

g.

[nryn]

1.09 doesn't fix the IR problem, and lots of plants show up hot in the IR spectrum (this is why IR photographs of foliage can be pretty spectacular).

 

This seems like a WB issue to me though.

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[adan]

Actually, I shot some shots in the Denver Botanic Garden greenhouse last weekend with the M8 - and yes, greenhouses trap IR (heat). That's their whole function. In my shots it only got heavy enough to be obnoxious in areas that were deeply shaded from visible light (like under banana trees). A strong orange undercast to even the grayish tree trunks (and WB wasn't really the issue, since they were RAW shots).

 

Come to think of it - one of the places I saw the most obnoxious orange cast using the Epson R-D1 2 years ago was also in a greenhouse-like setting - a butterfly museum full of tropical plants under glass ceiling.

 

Whereas under 'natural' jungle lighting in the Caribbean in December, there was only the 'normal' amount of IR effects from the M8.

 

As etherfarm says - software does nothing at all to reduce or correct for IR light. Only the filters will do that. The software will correct for the cyan corners that the filters produce with wider lenses - IF the lenses are coded and IF the filters are used.

 

[edit] Hah! Only just noticed we were at the SAME greenhouse, likely!

 

Here are two shots from the DBG - one under deep shade with lots of orange tint (even though the WB is bluish - see roof/sky upper right) and the visible lighting was tinted green by the leaves if anything.

 

The other shot - two girls - in a more openly lit part of the conservatory. The reddish plant to the right of the girls was, in fact, reddish. The rest are nicely green.