[AZ-Observing] Re: Imaging issues with an ImageSource DFK Camera
- From: "Jimmy Ray" <jimmy_ray@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Mon, 7 Feb 2011 19:12:03 -0700
Hi Tom,
You hit the Sun imaging issue right on the head! If I had correct exposure on
the limb, the center of the disc would totally overexpose and wash out. It was
maddening trying to get both. I see the historgram in the software and will
give that a try tonight on the Moon as you suggest. Start out small and work
up, what a novel concept! Guess my APOD image of the solar disc will have to
wait until next week ;-)
I'll see if a get anything worth posting.
Thank you,
Jimmy Ray
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Polakis
Sent: Monday, February 07, 2011 8:01 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Imaging issues with an ImageSource DFK Camera
Hi Jimmy,
I have used only IC Capture with my Imaging Source camera, and not had any
problems with it. The laptop is old, with only 1 Mb of RAM and a <2 MHz
processor. It doesn't take much computing power to run these things.
The diagonal waves across the image are a mystery to me. Do you have this
problem when you use the camera for imaging the moon? By the way, lunar
imaging would be a better way than solar imaging to ease into using the camera.
Regarding exposure, you should have the histogram active on the screen at all
times, and set the exposure using it. Make sure the right edge of the
histogram is no more than 80% of the way to saturation. For the sun, you will
learn that the prominences on the limb are two or three photographic stops
fainter than the disk. Unless you want to create masked images, you have to
settle for one or the other.
Contact me off line, and maybe we can get together to diagnose it.
Tom
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