Ways to manually adjust aperture on lens while taking video with Nikon DSLR Camera?
Is there a way (or multiple ways) to adjust the aperture using a Nikon DSLR camera while taking video? I have a D7000 and a wide assortment of lenses. Many old lenses I realize have adjustable aperture rings on the lens itself which seems to be a feature incompatible with newer cameras [unless f-stop is set to 22] and lacking from newer lenses (note: I'm completely unaware of any adapters that offer a means of making this option compatible.)
I know there are some specific 3rd party lenses out there that have aperture rings on them so you can adjust your depth of field range/brightness while taking video but am at a loss of how to find them.
Any hints, suggestions, techniques, links, companies, lens models etc… Would be greatly helpful.
{Incase it wasn't clear, my main objective is to find a way to broaden/narrow my depth of field while taking video using an adjustable aperture ring on the camera's lens}
When shooting video, the only control of the exposure are the following
* adjust the lens aperture
* adjust the ISO of the camera
* add or subtract light from the scene
If you want to decrease the depth of field by opening the lens, you will have to reduce the sensitivity of the sensor or add an and filter to the lens. Usually it is very difficult to reduce the actual amount of light in a specific scene
If you want to increase the depth of field, you need to close the lens aperture down until you have just the right amount of depth of field. With less light reaching the sensor, you will either have to up the ISO of the sensor or add more light to the scene.
Whether you use an actual aperture ring or control the depth of field using the camera control, really does not matter much.
You are now beginning to see just one of the drawback of trying to use a dSLR camera with a video "
feature" can be vexing.
What you may want to read before you start spending a lot of money on accessories to make your fine D7000 into a usable video camera. These problems will be encountered no matter what dSLR you use
http://www.luminous-landscape.com/reviews/camcorders/cam-cam.shtml
http://www.luminous-landscape.com/techniques/3_years_later_dslr_video_one_mans_perspective.shtml