here's my rendition of last night's Jupiter (and again, I missed the GRS!)
Jupiter 250608UT
Jupiter 250608UT
Jumped on the Jupiter bandwagon as well...
here's my rendition of last night's Jupiter (and again, I missed the GRS!)
here's my rendition of last night's Jupiter (and again, I missed the GRS!)
Last edited by rcj on Fri Jun 27, 2008 1:57 pm, edited 1 time in total.
![[smilie=woa.gif]](./images/smilies/woa.gif "woa")
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wucheeyiun
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still trying to settle for a standard way of presenting the information. The above rendition was based on a "darker" approach, rather than the "flat" type of presentation. Also had it a little tilted, so that it looks more like a view from outer space. Did not try to align on the moon yet. Perhaps I will try the next time. Still trying to experiment with the right settings for a given seeing/transparency condition... still very happy with the CN212! Collimation has not been touched (yet!), hopefully...
There is a GRS transit tonight, hope to bag more data, and settle on consistent values...
Actually, this session was pretty lucky, the seeing deteriorated substantially within a few minutes after a few initial captures. You can see the "seeing effect" lowering the quality of the images in the first four newest images under www.celestialportraits.com of Jupiter (taken on 26th June 2008, local time).
Lessons learnt in these few sessions of Jupiter is that for the DMK camera to work well, one has to be willing to experiment with a variety of settings. You may have to process the initial few ones on the spot to get an idea of the resulting colour image. Having the gain high for example is good to have if transparency is low, but having a gain low is sometimes good too to heighten the constrast of the features. Then there is the gamma setting as well, which may or may not determine the resultant noise level in the final image. Finally, it iwll also depend on the effective focal ratio that one works on (here's F30~31). So no standard settings apply for all systems. Every system is unique according to sky conditions as well. When seeing is bad, you may like to lower the frame rate. When the seeing is good, go for faster frames. Think planetary imaging is likened to cooking....yum! yum!
Oh, the moon's Io!
There is a GRS transit tonight, hope to bag more data, and settle on consistent values...
Actually, this session was pretty lucky, the seeing deteriorated substantially within a few minutes after a few initial captures. You can see the "seeing effect" lowering the quality of the images in the first four newest images under www.celestialportraits.com of Jupiter (taken on 26th June 2008, local time).
Lessons learnt in these few sessions of Jupiter is that for the DMK camera to work well, one has to be willing to experiment with a variety of settings. You may have to process the initial few ones on the spot to get an idea of the resulting colour image. Having the gain high for example is good to have if transparency is low, but having a gain low is sometimes good too to heighten the constrast of the features. Then there is the gamma setting as well, which may or may not determine the resultant noise level in the final image. Finally, it iwll also depend on the effective focal ratio that one works on (here's F30~31). So no standard settings apply for all systems. Every system is unique according to sky conditions as well. When seeing is bad, you may like to lower the frame rate. When the seeing is good, go for faster frames. Think planetary imaging is likened to cooking....yum! yum!
Oh, the moon's Io!
