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ASI120MM 不完全 PK Flea3 618

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发表于 2012-10-30 21:41 | 显示全部楼层 |阅读模式
本帖最后由 苏州振旺光电 于 2012-10-30 21:49 编辑

CN 上原帖地址:
http://www.cloudynights.com/ubbthreads/showflat.php?Cat=0&Number=5495939&page=0&view=collapsed&sb=5&o=all&fpart=1&vc=&PHPSESSID=

seeing不是太好 比较遗憾 都表现不是太佳,但效果也比较接近


Hi all - I should start this thread by declaring that these comparisons between the Flea3 ccd & ASI120mm cmos cameras aren't really a genuine comparison at all! - taken 1&1/4 hours apart in "slow" seeing I cannot make a clear difference between the seeing for each except to say it was fairly similar, but "average" at very best.....the faster frame rates of the Flea3 coupled with the fact that I had much more control over the image scale with it would have given it the edge regardless - I have quoted the FireCapture logs for f/l but am always suspicious of the figures therein.....suffice to say that the ASI image was significantly larger in 640x480 resolution onscreen.....

I have mentioned this before and really should have had an adaptor flange made up to drop the TeleVue 2X barlow back to about 1.4X for the ASI, but I have to work with what I've got up here and really, the seeing has just not supported the minimum scale I can attain atm with the cmos camera.

The Flea3 image clearly comes out on top but I think I can go much better with both if I get one decent session, even at 49 degrees - Zuo Zhao's images from Shenzhen with this cam and a 10" newt show what good seeing (and good elevation!!!) can achieve.....and at less than 1/3 the cost of the Flea3 or around 1/2 that of the DMK618 (whose frame rate it outperforms) there is no doubt in my mind that it will be a serious competitor in the planetary imaging stakes...

Apart from that we're still waiting on that one good night (a "reasonable night" would do very well thank you!! ) but we shot some iR742nM's with the Flea3 the night before - and it was great to not only watch Io emerge from behind Jupiter's disk but also Ganymede come out of Jove's shadow where it was eclipsed.....the enlarging crescent in the processed images was great to capture (no processing "fancies" here - just straight general treatment grabbed Ganymede's eclipsed appearances.)

Here's the Flea3 & ASI120MM side-by-side.....




5495783-Jup-Flea3-FL3-FW-03S1M&ASI120MM-Camera-(ZWO-Design)-SidebySides8bit.png
发表于 2012-10-30 21:49 | 显示全部楼层
感觉差距还是挺明显的!
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发表于 2012-10-30 22:15 | 显示全部楼层
拍摄时间间隔还是长了点
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发表于 2012-10-30 23:30 | 显示全部楼层
哈哈,支持好产品!
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发表于 2012-10-31 01:53 | 显示全部楼层
这可是一个CCD一个CMOS啊,而且at less than 1/3 the cost of the Flea3 or around 1/2 that of the DMK618::42::

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下一代行星摄影相机 必是CMOS  详情 回复 发表于 2012-10-31 09:46
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发表于 2012-10-31 04:13 | 显示全部楼层
两个木星都不怎么样。感觉还是flea3 好一点。

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最主要用的相同的巴罗 不好的天气下 120MM成像更大 所以也要虚一点  详情 回复 发表于 2012-10-31 09:44
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发表于 2012-10-31 08:44 | 显示全部楼层
相差一个小时,估计受天气的影响更大!
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 楼主| 发表于 2012-10-31 09:44 | 显示全部楼层
oneboy007 发表于 2012-10-31 04:13
两个木星都不怎么样。感觉还是flea3 好一点。

最主要用的相同的巴罗
不好的天气下 120MM成像更大 所以也要虚一点
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 楼主| 发表于 2012-10-31 09:46 | 显示全部楼层
cnwestcn 发表于 2012-10-31 01:53
这可是一个CCD一个CMOS啊,而且at less than 1/3 the cost of the Flea3 or around 1/2 that of the DMK618 ...

下一代行星摄影相机 必是CMOS
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发表于 2012-10-31 15:37 | 显示全部楼层
没用过顶级产品,不过120已经绝对超值的了。虽然天文器材很少讲性价比,嘿嘿。::070821_01.jpg::

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天文器材当然讲性价比啦 呵呵 和顶级的比 120不差  详情 回复 发表于 2012-10-31 19:46
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 楼主| 发表于 2012-10-31 19:46 | 显示全部楼层
Sun1990 发表于 2012-10-31 15:37
没用过顶级产品,不过120已经绝对超值的了。虽然天文器材很少讲性价比,嘿嘿。 ...

天文器材当然讲性价比啦 呵呵
和顶级的比 120不差
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发表于 2012-11-7 23:55 | 显示全部楼层
CMOS再加一把劲就赶上CCD了....foveon x3 cmos sensor不知到会不会好点 可是好象市场还空缺着啊
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