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Narrowband

coolraiser103

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  1. I suppose another way to think of it might be to increase the image size itself. Of course, in order to do that, I'd need to increase my focal length... Looking at the data for Saturn in calsky for July 4, 2014, it appears that Saturn and its rings were 41.5" wide at that time. It is 116 pixels wide in this image, so that means each pixel covers about .35". Given that the Cassini division was perhaps less than one arcsecond wide at this point, it would make sense that my image shows it as being about 2 pixels wide. What I gain from this is that increasing the focal length with a barlow would simply blur the lines between contrasting areas, since my telescope has a resolving power of one arcsecond. Thus the result would be no different as if I had simply resized the image in Photoshop. So it does seem, then, that my images might not get too much nicer until I can purchase a larger scope. On a slightly related note, I'm still not quite sure about the function of binning. I've been into the imaging scene for a little over a year now, but binning isn't something I've dabbled into yet.
  2. When it comes to planetary imaging, I seem to succeed in the processing part. An image of mine from July 4, 2014 shows what I mean. (I placed it into the attachments since it doesn't want to go into this post.) It was taken using a Vintage Celestron 5, and a Neximage 5 for the camera. It was stacked and processed in Registax 6, and finalized in Paint.Net. The issue I have with it is the resolution. The seeing that night was wonderful, but with such a small image the details just can't come out. I'm unsure of how to proceed without spending too terribly much on this. In addition, I feel that using a barlow lens isn't often a great idea due to the increased blur and decreased light input, overall creating noise. Perhaps I might be making the wrong conclusions? What is a decently inexpensive method to increasing image resolution in planets? As always, be sure to ask questions for clarification! Saturn July 3 2014 1055PM.bmp
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