Comparison between 680nm, 720nm and 760nm filters

[focus627]

Today finally tested the few no brand IR filters I have imported for my web shop.
Camera: Canon 1D ii
Lens: Takumar SMC 28mm
Aperture: F8
It seems beyong 760nm, the photoes are in pure back/white after setup white balance.
Hope it helps. Thanks.

1. 680nm (Without swaping channels)

2. 680nm (swap channels)

3. 720nm (Without swaping channels)

4. 720nm (swap channels)

5. 760nm (Without swaping channels)