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Mark Baculy · February 14th, 2007, 05:02 PM

I have a theory about the problem now after trying something with the hd1.
I set the camera to MF and shutter priority. The iris is currenty stuck at about f5. Looking in the lens I can see the diamond shape aperture opening. As I shine a bright light into the lens, the aperture opening does not change however the readout on the lcd moves up and down with the light as I pass it over the lens. Now I put the camera to my ear, listen carefully and pass the light back over the lens and I can hear a motor running in steps. Since the focus is set to manual the noise I hear is not the focusing motor. (It sounds totally different anyway) So here is my thought, the iris mechanism is to blame. I think the motor is disengaged from the lever it is attached to for whatever reason, either defective manufacturing, incorrect tolerances, maybe the part gets tweeked when it gets screwed down. The part is very small, only about 1/16" thick. I am going to dissect the little thing and find out if I'm right. This would explain why some cameras work after giving them a good smack. It would also explain why cameras fail after warranty repairs. You can replace the lens assembly all day long, but if they all have flakey iris mechanisms what good is it? I'll take pictures, but could some tell me how to post them on here?

February 14th, 2007, 05:02 PM	#3
Mark Baculy New Boot Join Date: Feb 2007 Location: Grand Rapids, MI Posts: 9	Black screen theory I have a theory about the problem now after trying something with the hd1. I set the camera to MF and shutter priority. The iris is currenty stuck at about f5. Looking in the lens I can see the diamond shape aperture opening. As I shine a bright light into the lens, the aperture opening does not change however the readout on the lcd moves up and down with the light as I pass it over the lens. Now I put the camera to my ear, listen carefully and pass the light back over the lens and I can hear a motor running in steps. Since the focus is set to manual the noise I hear is not the focusing motor. (It sounds totally different anyway) So here is my thought, the iris mechanism is to blame. I think the motor is disengaged from the lever it is attached to for whatever reason, either defective manufacturing, incorrect tolerances, maybe the part gets tweeked when it gets screwed down. The part is very small, only about 1/16" thick. I am going to dissect the little thing and find out if I'm right. This would explain why some cameras work after giving them a good smack. It would also explain why cameras fail after warranty repairs. You can replace the lens assembly all day long, but if they all have flakey iris mechanisms what good is it? I'll take pictures, but could some tell me how to post them on here?