Search found 3161 matches

by admin
Thu Nov 23, 2017 10:58 pm
Forum: Tutorials
Topic: Picking the correct exposure for Deep Sky
Replies: 8
Views: 6143

Re: Picking the correct exposure for Deep Sky

Part 3 - Background Signal We've already mentioned that there are two main sources of background signal (that is sources of detected electrons that don't come from the faint fuzzies that we are hoping to image). Those sources are * Light pollution background * Thermal background The light pollution...
by admin
Thu Nov 23, 2017 10:27 pm
Forum: Tutorials
Topic: Picking the correct exposure for Deep Sky
Replies: 8
Views: 6143

Re: Picking the correct exposure for Deep Sky

Part 2 - Random Noise Let's talk for a moment about how a digital imaging sensor works... Photons (which have been collected by your telescope or camera lens) hit one of the pixels on the sensor and each photon that hits the sensor has a chance of being detected. Being detected means that the photo...
by admin
Thu Nov 23, 2017 9:31 pm
Forum: Tutorials
Topic: Picking the correct exposure for Deep Sky
Replies: 8
Views: 6143

Picking the correct exposure for Deep Sky

Let's set out the goal to begin with, which is to answer this question : What is the best exposure for me to use when taking Deep Sky Images? Actually, the question is actually a good deal longer than that - something more like Given that I'm using camera [X] with telescope [Y] and that my light pol...
by admin
Thu Nov 23, 2017 8:51 pm
Forum: Feature Suggestions
Topic: HDR Stacking
Replies: 1
Views: 473

Re: HDR Stacking

Hi, I think that dropping to a lower exposure during stacking will have a small effect in pulling some pixels down from being fully saturated to just being nearly saturated, so might work to a degree. This will only work if you are using the 'Default' stacking algorithm - if you are using the Sigma ...
by admin
Thu Nov 23, 2017 8:40 pm
Forum: Bug Reports
Topic: Exposure times are doubled with Lodestar X2
Replies: 2
Views: 422

Re: Exposure times are doubled with Lodestar X2

Hi, this is a peculiarity of the Lodestar camera which is an interlaced camera - that means that you can only expose 1/2 of the pixels at one time (as far as I can work out anyway). So, if you want a 4 second exposure at full resolution you have to do a 4 second exposure for rows 1,3,5,7 etc and the...
by admin
Thu Nov 23, 2017 6:12 pm
Forum: Feature Suggestions
Topic: Zoom Feature
Replies: 7
Views: 1050

Re: Zoom Feature

Ah, yes, that's correct - I guess you must either be running a fairly low res camera or a very high res monitor!

More zoom options are actually pretty easy, so I will put this on the todo list.

cheers,

Robin
by admin
Thu Nov 23, 2017 4:19 pm
Forum: Bug Reports
Topic: Wot no camera.
Replies: 1
Views: 364

Re: Wot no camera.

Sounds like the USB connection to the camera was lost - in some circumstances the ZWO SDK tells SharpCap that the camera has gone and you end up with the camera closing down on you as you describe. To be honest the most usual case though is that the SDK doesn't notice it's gone and you get a crash a...
by admin
Thu Nov 23, 2017 4:14 pm
Forum: How do I?
Topic: Capturing: 0 frames
Replies: 3
Views: 449

Re: Capturing: 0 frames

Good to hear that's fixed then :)

Robin
by admin
Thu Nov 23, 2017 4:13 pm
Forum: Feature Suggestions
Topic: Zoom Feature
Replies: 7
Views: 1050

Re: Zoom Feature

Did you spot the 'auto' zoom level which fits the image to the available space? Does that not meet your needs?

cheers,

Robin
by admin
Thu Nov 23, 2017 8:11 am
Forum: How do I?
Topic: Capturing: 0 frames
Replies: 3
Views: 449

Re: Capturing: 0 frames

Hi, the fact that the camera didn't appear under 'QHY Cameras' in the menu indicates that the SDK did not detect the camera correctly, which can be related to driver or USB cable problems. Unfortunately manufacturers can't make the DirectShow camera entries disappear when the camera is not connected...