关于2006年市场上适于拍摄天文的数码相机（请教）

今年想买一款数码相机，用于天文拍摄，可是到市场上一看，种类已与前几年大有不同，有些不知所措，所以想请教各位大侠，现在何种型号品牌的数码相机较为适于天文拍摄呢（是不是所有的单反都可以？）？请列举一下不同档次的品牌及型号。不胜感激！另外，我看了一下柯达7590、理光GX8、佳能A540，不知为三款如何？请指教！

数码单反适合天文摄影，小数码只能拍月亮，其它目标都太勉强。

比较适合的数码单反佳能的350D，钱多的上30D，甚至5D。尼康的D50、D70和D200也可以。不过一般认为佳能的噪点抑制能力比较好，这对天文摄影很重要。

但是，据称佳能的相机为了迎合大众消费，在成像上做了技术处理，从而使得其成像质量趋于平猾。而尼康与索尼的相机成像则相对要尖锐多。是这样吗？

想拍天文照片。。。
   canon1d  20d  30d   350d  300d 10d   都行
   nikond70s   d100  d200   d2   d50（勉勉强强）
      如果有精力有技术。胶片机也是不错的选择
    如果有银子，最好用ccd
    你说的那些相机是生活照用的，最多白天用用。 :

Of course Canon 20Da, ( the last letter 'a' means astronomy)
It is the only camera (I know so far) made for regular and astronomical photography.


EOS 20Da
Designed especially for photographers who want to capture galaxies far, far away the EOS 20Da camera delivers outstanding photos of the night sky. Most features of the EOS 20Da are shared with the standard EOS 20D camera but several important modifications have been made to optimize the camera’s astrophotography capabilities.

The EOS 20Da yields sharper and higher contrast images of various astronomical phenomena such as diffuse reddish nebulae because of a special, modified low-pass filter that is positioned in front of the EOS 20Da’s 8.2 Megapixel CMOS sensor,. The modification increases the transmission of light at the specific wavelength of 656nm, known as the Hydrogen Alpha line or Ha wavelength, by a factor of 2.5x compared to the standard EOS 20D.

The 20Da makes framing the image easier with a magnified live view mode on the 1.8” LCD monitor. This is not possible with traditional digital SLRs, but the 20Da allows the photographer to lockup the mirror and open the shutter at night to view subjects before the image is captured. The central portion of the image is magnified by 5x or 10x to ensure sharp focus. The live view mode can also be used with a TV monitor connected to the camera’s video out terminal.

For the long exposures required in astrophotography, the EOS 20Da features enhanced noise reduction incorporating an optimized CMOS control system. A custom function is also available for noise reduction allowing the user to achieve maximum image quality at ISO settings from 50-3200.

The EOS 20Da can be connected to a telescope using a standard, widely available T-mount, thus enabling incredible images of distant subjects that are normally invisible to the naked eye. In addition, the camera is also compatible with over 50 EF and EF-S lenses, including Canon’s renowned Image Stabilizer super-telephoto lenses. Conventional photography is also possible by mounting an infrared filter on the lens.

20Da 停产饿．．．．．．．．．．．．

在胶片时代，尼康的相机成像锐利，佳能的色彩饱满，这主要是由其镜头风格造成的，而且是指中高档镜头。在一些低端镜头，尼康并没有显示出成像锐利的特点。目前销售的D50套机，就没有体现出“锐利”的风格。

[quote:38da0d59e1="孤傲天空"]但是，据称佳能的相机为了迎合大众消费，在成像上做了技术处理，从而使得其成像质量趋于平猾。而尼康与索尼的相机成像则相对要尖锐多。是这样吗？[/quote]

在数码时代已经不存在这种说法了，实际上胶片时代也有很多争论，主要是镜头差距

wa!大家都在讨论单反哦。