SharpCap Forums

Hi Robin, I think that you mentioned that the documentation of the "SharpCap.ImageProcessing" assembly is a work-in-progress. Do you know if there is anything in there that would allow me to stretch an image? Hopefully that will give OpenCVStarDetector more meat to sink its teeth into. Tha...

Hi Robin, I've developed a number of useful scripts based on calls to OpenCVStarDetector. The problem I am having is that it is not very sensitive at all. I can send you snapshots but I can summarize by saying that I clearly see 7 stars but it struggles to find 3 maybe 4 if it is lucky. Here is how ...

Let me take that back... If using your finderscope at 175mm focal length works then use it! You will save the cost of the focal reducer. The focal reducer will make your 400mm scope into 200mm. There isn't much difference between 175 and 200, plus you will get a slightly wider field of view at 175mm...

I would suggest getting the 0.5x focal reducer.

My winning combination is: 1. 400mm scope with 0.5x focal reducer yields 1.7 degrees on the diagonal of my ASI120MC 2. 2sec exposure 100 gain with dark frame subtraction 3. Minimum star width: 4 pixels 4. Wait until beginning of astronomical twilight (Sun is 12 deg below horizon) Within 20 minutes I...

Reticule is a nice feature but it would be great if I could get a readout of the angle of the crosshairs. I need +/-180 degrees. It should change whenever I right-click on the image.

Hi Robin, Thanks for all your help. I dug around on the web and found some useful information at the DSS website. I could be wrong but my takeaway was that you can never have too many darks! Well I allowed that to bounce around in my empty skull for a while, and then I came to the frightening realiz...

Robin, When I launch the dialog to begin dark frame acquisition it defaults to 10 frames. I have always wondered if there is a magic ratio of darks to lights that achieve the best result. My gut tells me that if I aim to only collect 100 lights then 10 darks are acceptable, but if my goal is to coll...

Robin, I made a major blunder by reusing darks that were acquired the previous night at a cooler sensor temperature. The result is that my newly acquired lights, with dark frame subtraction turned on, have lots of hot pixels shining through. Is there a way to get SC to perform the inverse of dark fr...

Hmm, yes, I think I might back down to 90 sec subs. I looked back at my camera settings file for the darks and compared it to the lights. The darks were captured at 12.5C and the lights at 13.2C. To me with my limited experience that is not a huge difference. So I think that 120 sec subs are out, an...