Is it possible to see the Mercury transit through a PC164 and KIWI-OSD set? Or will Mercury appear too small to be recognizable? I will be using a 400mm focal...
... OSD ... Longer focal length would certainly be preferable, but you might make it out. Some numbers: At 400 mm focal length, the PC164C will display...
My first attempt to use the PC164C video camera was on a filtered 8" pointed at the sun. I could understand why there was concern about the effect that the ...
Thanks for warning me of that. What do I need to do to prevent overheating and burning my CCD chip? Is an ND5.0 filter enough? DSLR users use photographic...
... the ... I don't have exact dimension information, but there are several files on the camera in the IOTAoccultations discussion group Files section. What...
PC164C Sony Chip ICX254AL • Optical size: 1/3-inch format • Number of effective pixels: 510 (H) ´ 492 (V) approx. 250K pixels • Total number of pixels:...
ISS cross over the sun just 30 minutes after interior egress of Mercury. I successfully observered these two events in Hong Kong. Link of ISS photo as below...
Hello Yue, I was thinking, perhaps we can compare our 3rd contact results, the white light I posted and your H-alpha, making necessary adjustments for our...
... Thanks Bamm, very interesting - you make it look easy ;-) I thought I would also cc this message to the IOTA egroup, because your post prompted me to...
Thanks for your thoughts, Geoff. We will keep those things in mind next time we attempt to shoot a bright object. What better way to improve than to learn from...
Dear Bamm, Yes, I like to do that because I have problem on compare the white light contact time and the H-alpha contact time for Mercury transit. I assume the...
Dear Bamm, This is the link of H-alpha photo, I captured during the 3rd contact. A moving object also appear next to Mercury (from the motion and speed, I ...
Dear Yue, I may be mistaken, but it seems to me that the frame was taken after the third contact. Mercury's black dot seems to be intersecting the edge of the...
... Since you have a sequence of images, you can probably locate the time when the center of Mercury crossed the solar limb quite accurately. Measure the...
... Sorry to confuse you Bamm. I was "thinking out loud" and wondering if we could somehow examine an image (from a PC164 camera) and make some "guess" as to...
Hello Yue, May I know the GPS latitude and longitude of your observation site as recorded in the KIWI-OSD? In our observation site in Gubat, Sorsogon,...
... Would it be possible for a future version of the KIWI-OSD to communicate with the camera and stamp the frame based on the exposure time used by the camera?...
would not this be due to the fact that Mercury's path did not intersect the Suns limb at a 90 degree angle so it took longer for the edge of Mercury to move...
Dear Bamm, Observation site and GPS information during Mercury Transit 22 degree 12.3874 min North 114 degree 2.2317 min East 10 satellites being used ...
Dear Geoff, Using #263,092 as an example. Do you mean if I use 1/500th sec shutter speed, the time of exposure will read as 00:10:11.832 (+/- 1 milliseconds)...
I think this is one of the reason, I am also try to use Limovie and what Mr. Walt Morgan's method to see I can determine the interior egress time more accurate...
I follow Walt's suggest method to determine the 3rd contact time under H-alpha. I got 0h 09m 48 s (+/- 1 sec) which is still different from the 0h 09m 18.8 s,...
... In short No, there is no standard information (protocol) that is given by the camera to make this possible. Humans are still needed to 'interpret' the time...
... Yes, the above principle is correct, however we must remember that KIWI OSD has an implied accuracy of +/- 1 millisecond, so we should not claim any...
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