Capture area

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Ronald
Posts: 37
Joined: Sat Feb 29, 2020 9:51 pm

Capture area

#1

Post by Ronald »

Hi all
We have been using our zwo294 osc for about 6 month's, I decided to experiment with the capture area settings the full sensor is 4144x2822 during a day time test I selected 1600x1200 capture area. What I noticed immediately was the image became much larger the object is a communication tower on top of a mountain several miles away. Is this normal ? and if it is will this degrade my images? I like the idea of having the option of our targets being the full size of the frame, Our asi224 has a very similar image scale at roughly the same capture area of 1600x1200 any advice is appreciated
Also we are working on a cloud filter haven't quite worked out the bugs :D
Ronald and Kimberly
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admin
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Location: Vale of the White Horse, UK
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Re: Capture area

#2

Post by admin »

Hi folks,

by selecting a smaller capture area you are basically telling SharpCap to only collect the image from a small sub area of the camera sensor. It's a bit like cropping a digital photograph, but is being done when the image is captured rather than being done later on.

Using a smaller capture area will not adversely affect the image quality - the quality will be just the same as if you had captured the full area of the camera and then cropped/zoomed in on the area of interest afterwards.

The smaller capture area does have some advantages - smaller saved files and a higher frame rate (useful for lunar/solar/planetary).

Hope this helps,

Robin
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