Have I miscalculated the exposure in my reply above?Your exposure will be far too long to be useful, if you were to use a standard camera with an R72 filter on the lens. Best to just fake it in post with something like Photoshop to get the IR effect you are looking for.
The exposure with a standard camera in mid day sun would normally be several seconds to get a good photo with an IR filter. Of course it depends on your film speed. But I was speaking to the OP regarding wanting to shoot from his drone to get IR images. Plus the IR spectrum has a different point of focus than normal light film. Therefore, if you focus in a normal camera and then fit the IR filter and expose your shot, you will not have an in focus image when using IR light. That's why old camera lenses had that red mark on the focus ring to show where you needed to move too, after properly focusing in normal light, after you then screwed in the IR filter, since this was too dark to be able to see to focus.Have I miscalculated the exposure in my reply above?
I think the exposure I calculated was correct.My experience with the R72 is with a mirrorless Olympus.You can focus with the filter on with the live view boost on.I don't believe the R72 causes misfocus on the drone but ICBW.The exposure with a standard camera in mid day sun would normally be several seconds to get a good photo with an IR filter. Of course it depends on your film speed. But I was speaking to the OP regarding wanting to shoot from his drone to get IR images. Plus the IR spectrum has a different point of focus than normal light film. Therefore, if you focus in a normal camera and then fit the IR filter and expose your shot, you will not have an in focus image when using IR light. That's why old camera lenses had that red mark on the focus ring to show where you needed to move too, after properly focusing in normal light, after you then screwed in the IR filter, since this was too dark to be able to see to focus.
In the old days, you would set up on a tripod, focus, then put on the filter and then move the focus point to the red mark and that would then have your selected point in focus for an IR exposure. Hope that makes sense.
I can't speak for your camera, I can only tell you that using film day light and a standard slR and lens, daylight has a set focus point. If you left the camera and lens setting fozen at that focus point, when you put an R72 filter on the lens, the IR light is not the same as normal daylight that our eye sees and it does have adifferent point of focus. I am sure all these years the camera makers and lens makers did not choose to put that IR focus point on the lens just for fun and to make it more colourful.I think the exposure I calculated was correct.My experience with the R72 is with a mirrorless Olympus.You can focus with the filter on with the live view boost on.I don't believe the R72 causes misfocus on the drone but ICBW.
We use essential cookies to make this site work, and optional cookies to enhance your experience.