原帖由 我爱祖祖 于 2007-5-21 22:50 发表
基本上想再考虑买个OR18, 25,配合5X上高倍也是个不错的选择.
刚才在ASTROMART上看到老外也是这样搭配的.
I agree with you Floyd. Below the 12.5 mm model the eye relief gets too tight for me also. For the budget minded, however, one can put together a reasonable and inexpensive set of planetaries by purchasing the 18 and 12.5 mm sizes and adding a good barlow to get 9 and 6.25 mm. This keeps the eye relief of the larger focal lengths and gives you more of a porthole to look through. The quality of the images is also pretty good. I have this set up and a couple of Radians. While the Radians are better I still like keeping the orthos and barlow around for situations when my expensive stuff needs to be kept safe (especially star parties where there are a lot of children or inexperienced people around).
大意是: OR12.5以下对我来说出瞳距离太低了,但是你可以选择一个合理并且廉价的行星目镜组合,就是买18MM和12.5MM规格的OR目镜,加上一个好的巴罗(根据下文意思,应该说的是2X),得到9MM和6.25MM.这样可以保证较好的出瞳的情况下获得更高的倍数,这个画面素质仍然相当好.我还有两个RA,尽管RA更好一些,但是当周围有很多小孩或者没有观测经验的人的时候,我还是愿意用OR和巴罗的组合,这样可以保护我贵重的设备(RA).
老外说话都挺幽默的,呵呵 |