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Infrared Sensitivity of the Minolta D7IR


camera overview


 
Modded camera without IR cut-filter!
Minolta D7 (for comparison)
Camera: Minolta D7 (for comparison, shot the same day)
Filter: none
Exposure time: 1/350
F-stop: 6.7
ISO speed: 100
Focal length: 7.2695
White Balance: automatic
aEV: 13.9395EV

comments:
Minolta D7IR
Camera: Minolta D7IR
Filter: none
Exposure time: 1/350
F-stop: 6.7
ISO speed: 100
Focal length: 7.2695
White Balance: manual
EV: 13.9395EV

comments: Strange! The modified camera meters the scene exactly the same as the stock D7, but the photo is brighter. So the camera is somehow metering differently. Either I goofed up or the green leaves had some influence due to "IR contamination" - they are very bright in IR light as you can see below.
Camera: Minolta D7IR
Filter: Heliopan 715nm IR pass filter
Exposure time: 1/125
F-stop: 4.5
ISO speed: 100
Focal length: 7.2695
White Balance: manual (with filter on)
EV: 11.3056EV

comments: strong bright center spot (hit spot). It does show less in B&W mode.
 





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