jim_mueller2 Posted January 18, 2004 Share Posted January 18, 2004 Has anyone used the Canon 300D (Digital Rebel) For Astrophotography? The 10D has earned a pretty good reputation as an astrophotography camera. Since the 300D uses the same Sensor Chip I assume it should be just as capable. Yes? Link to comment Share on other sites More sharing options...
yakim_peled1 Posted January 19, 2004 Share Posted January 19, 2004 Yes. Happy shooting , Yakim. Link to comment Share on other sites More sharing options...
michael focus97.com lee Posted January 19, 2004 Share Posted January 19, 2004 As a 10D owner, I'm a bit confused with the use of the 10D's sensor (and the 300D's) for Astrophotography. I assume this type of photography has exposures measured in minutes, and from the literature I've read, exposures running passed four minutes tend to give poorer results. It had something to do with some kind of amplifier mounted near one of the corners of the camera's sensor that, when exposed for many minutes, tended to heat up, causing markedly increased noise in that corner of the frame. The problem was more pronounced in non-Canon cameras, as the amplifier was mounted right near the sensor. Though it was less of a problem in Canon's 10D, thanks to Canon engineers who, aware of the problem, mounted the device farther away from the sensor to avoid the heat-caused noise, it was still something unavoidable in longer exposures. I'm curious to know more... Link to comment Share on other sites More sharing options...
ron c sunshine coast,qld,a Posted January 19, 2004 Share Posted January 19, 2004 The 300D chip is not quite the same as the 10D.It is still quite good though! <br>I have heard of the problem michael mentions but haven't experienced it yet.I've only done relatively short exposures of 20-30 sec with the 50/1.8 lens. Link to comment Share on other sites More sharing options...
shachar_weis Posted January 19, 2004 Share Posted January 19, 2004 read this : http://clarkvision.com/astro/canon-10d-signal-to-noise/ Link to comment Share on other sites More sharing options...
rich_wardwell Posted January 19, 2004 Share Posted January 19, 2004 I have experienced a problem with my 300D that sounds like what you described. With exposures longer than 2 minutes, a red shading begins to appear in the bottom left corner. At 10 minute exposures (especially at higher ISO's), it can take up to 5-10% of the frame. I'm not convinced that all 300D's experience this, and I've certainly seen 10D long exposure examples that do not experience this problem, so mine is at the Canon service depot at the moment. Assuming this is just an anomaly, my other experiences are that the 300D lacks mirror lockup which the 10D has, possibly making a difference on the long exposures. Link to comment Share on other sites More sharing options...
charlie_vigue Posted January 19, 2004 Share Posted January 19, 2004 My understanding is that for really long exposures MLU is not a requirement. It is for shorter exposures, where the exposure is mostly or entirely accomplished during the time the mirror has excited the mount, that it has value. If I understand correctly. This certainly seems to be my experience. Link to comment Share on other sites More sharing options...
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