+Graham Posted August 22, 2016 Share Posted August 22, 2016 Been trying out the QHY 5II today with the Lunt. Downloaded the latest version of Fire Capture and after a bit of a battle got it running. The problem I have if you look at the image is the banding. Now the old QHY 5 had this issue and there was a way round it but that is lost in my far and distant memory. It was something to do with band width / buffering issue. Any one got any ideas on how to cure this. This image is a single frame the AVI's once stacked are even worse. Thanks Graham Link to comment Share on other sites More sharing options...
Guest Posted August 22, 2016 Share Posted August 22, 2016 I sometimes get this with my PST and compact digital camera. As my compact digicam uses the dreaded Bayer matrix, most of the banding is on the red channel, so I can process it out. Can you try using flats and darks? Link to comment Share on other sites More sharing options...
+Graham Posted August 22, 2016 Author Share Posted August 22, 2016 Hi Phil Unfortunately not the 5 is a mono camera. Its not noise as such its the camera missing lines when it downloads the frames. I will try next time running it on its own USB lead and not through the powered hub. Link to comment Share on other sites More sharing options...
Perkil8r Posted August 22, 2016 Share Posted August 22, 2016 It's known as Newtons Rings (I think) and Steve (Ibbo) has had issues with it in the past. Drop him a PM although I'm sure he'll be along later anyway if he drags himself away from the fish and chips long enough Just to add, ZWO recommend tilting the camera slightly for solar imaging to try and cure this sort of thing. Have a dig about on the old interweb, there's quite a bit out there about it but as I say, Steve is your best bet IMO. +Graham 1 Link to comment Share on other sites More sharing options...
+Graham Posted August 23, 2016 Author Share Posted August 23, 2016 Thanks Mike. Will give the tilting a go. Link to comment Share on other sites More sharing options...
+Graham Posted August 23, 2016 Author Share Posted August 23, 2016 Mike. Just read a very long and detailed explanation of this phenomenon and it is more often than not caused by the optical window in front of the chip. The good news is I can unscrew the front cover on the qhy5 and remove the optical window. I will give it a try tomorrow. Thanks Mike. Link to comment Share on other sites More sharing options...
Perkil8r Posted August 23, 2016 Share Posted August 23, 2016 Fingers crossed then From what I've read, CCD's don't tend to suffer the same issues, not really sure quite why that is though. Link to comment Share on other sites More sharing options...
+Ibbo Posted August 23, 2016 Share Posted August 23, 2016 Something to do with rolling shutter I believe Link to comment Share on other sites More sharing options...
+Graham Posted August 23, 2016 Author Share Posted August 23, 2016 (edited) 31 minutes ago, Ibbo said: Something to do with rolling shutter I believe Interesting point Edited August 23, 2016 by Graham Link to comment Share on other sites More sharing options...
+Ibbo Posted August 24, 2016 Share Posted August 24, 2016 Try a tilt Are you doing full disc in one go? Link to comment Share on other sites More sharing options...
+Graham Posted August 24, 2016 Author Share Posted August 24, 2016 (edited) Hi Steve Cannot tilt the 5 because of its shape. It fits inside the focuser. Yes full disc Edited August 24, 2016 by Graham Link to comment Share on other sites More sharing options...
Perkil8r Posted August 24, 2016 Share Posted August 24, 2016 Are you double stacked? If so I expect you can tilt the objective end etalon, I know you can on the Coronado, that may help a little? Link to comment Share on other sites More sharing options...
+Graham Posted August 24, 2016 Author Share Posted August 24, 2016 Well I have tried all I could today and still no go. It is definitely the camera that is at fault. Nothing else for it but bit the bullet and get another camera. Link to comment Share on other sites More sharing options...
Perkil8r Posted August 24, 2016 Share Posted August 24, 2016 I think you may still suffer Graham. There are gadgets out there to induce small amounts of tilt in the train. Steve had one I think. I really don't think changing the camera is the solution though. Link to comment Share on other sites More sharing options...
+Graham Posted August 24, 2016 Author Share Posted August 24, 2016 10 minutes ago, Perkil8r said: I think you may still suffer Graham. There are gadgets out there to induce small amounts of tilt in the train. Steve had one I think. I really don't think changing the camera is the solution though. It must be the 5 Mike as I do not get any troubles when I use the Lifecam. I even tried my old 350 D on it today. Apart from all the crap on the chip the image was perfect. +Ibbo 1 Link to comment Share on other sites More sharing options...
Perkil8r Posted August 24, 2016 Share Posted August 24, 2016 It is possibly showing because it is more sensitive than the lifecam or canon. I really do advise you to speak to Steve whom I know has had the same issues with various cameras. I know for sure the issues were there with the ZWO but I think he also had issues with the blackfly too. I just don't want to see you spend money on another camera if you don't need to fella +Graham 1 Link to comment Share on other sites More sharing options...
+Graham Posted August 25, 2016 Author Share Posted August 25, 2016 That's a good point Mike. Thanks. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now