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On a similar note I found a laptop near the base of the scope made for bad AP, eventually figured out even the night vision colour setting in carte du ciel was bright and close enough to cause poor images. Ended up getting a 3m usb cable and keep the laptop as far away from the scope as possible
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No question, just showing off new toys
Dave 2112 replied to MattJenko's topic in Discussions - Cameras
Very nice! Quite like the thangka thing on the mantelpiece too, got something similar on wall here. -
Its been a little while since I did a philosophy module as part of a non-philosophy degree, but that's how I remember it being described. Something along the lines..."I see that A+B = C" so I come up with the theory A+B=C. And its fine until X comes along and points out if A+B happens while D is present the result is E. So being a theorist I don't simply fall into an "I'm right you're wrong" argument, instead I thank them for the input and opportunity to refine my theory to "If D is not present, A+B=C". The great thing about theories is discussing them can be entertaining, enlightening and en
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Wasn't it Aristotle who theorised men have more teeth than women? Since he successfully argued it must be so (for reasons I either forgot or never bothered reading) it was accepted men did indeed have more teeth than women. If only he bothered with a simple experiment of counting teeth... To me that pretty much sums up theories...they are so much more convincing if there is at least some attempt at providing supporting evidence, otherwise its just philosophy, and even great philosophers can be wrong.
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ASI120MC focus with a 50mm guide scope
Dave 2112 replied to alcol620's topic in Discussions - Cameras
Ha...turns out you were doing that while i was writing that post! Glad it's sorted, and hope it all works. -
ASI120MC focus with a 50mm guide scope
Dave 2112 replied to alcol620's topic in Discussions - Cameras
Not sure if its more or less length, still working this stuff out too. I'm setting up a Skywatcher finderscope with QHY5 (and some youtube help) and haven't got as far as testing it tracking, but can get focus without any extension. Might be worth asking Skys the Limit. I've had some stuff from him in the past, very nice guy and he's likely to have an idea of how to make it focus. -
ASI120MC focus with a 50mm guide scope
Dave 2112 replied to alcol620's topic in Discussions - Cameras
Not trying to be funny, but you have tried twisting the focuser on the end of the scope to get focus or are you just moving the camera position? When looking at setting mine up it seemed a few people ran into that problem. -
ASI120MC focus with a 50mm guide scope
Dave 2112 replied to alcol620's topic in Discussions - Cameras
Have you tried taking the locking ring off the front of the scope? Should give an extra few mm, might be enough. -
After much experimentation this evening the options that seem to work best for me are definitely Kappa Sigma (not median), per channel background calibration, everything else default. Used DSS 3.3.4 and images taken with a 100D. Marking the comet doesn't seem to make any difference I can see, adding darks keeps the noise down. I had the star detection as high as I could get it on 10 x 30s at 1600 ISO, and adding more data just increases noise around the comet without adding detail to the tail. A very purple image came out, fiddling with the levels, upping the saturation to 20% and a curve like
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Excellent, thanks! I see you did the sensible thing and read the manual, I just did the usual...steamed in and pressed buttons. When I get back home I'll double check the settings for Kappa and RGB and let you know. Also I was using DSS 3.3.2 although I have just updated to 3.3.4 not sure it makes any diffence to the final image though.
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Hi Alex, Stacking comets seems a real test of patience, almost makes me glad they are rare events. I couldn't get the comet stacking option to work in DSS. The reticule would lock on to every star but wouldn't lock on to the comet and all stacks ended up as large blobs. In the end I used the edit star button to remove every star in one sub as an attempt to make it lock on the comet but it still wouldn't. I stacked it anyway, 10 subs, with darks, didn't compute offsets, stacked using the kappa sigma option and left everything else to default. The end result was very washed out, but I saved it w
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Comet Lovejoy 12 01 2015
Dave 2112 replied to davefrance's topic in Imaging - Widefield, Special Events and Comets
Once you've had a go at stacking comets its easier to be happy that they only come around once in a blue moon. Really well defined comet core in that, great image. -
Just the comet
Dave 2112 replied to ollypenrice's topic in Imaging - Widefield, Special Events and Comets
Stunning! Is there a version with stars?