看来现在要去订个AP玩了。哈哈。等10年就买得起了。。
要是喜欢摄影及AP产品的话，要有不错的环境和财力，最新的AP305mm F3.8 Riccardi-Honders Astrograph相信也是不错的选择，今年最新产生的waiting list。相信金融危机影响，队列还不至于很长～～
看着有点累啊
要是喜欢摄影及AP产品的话，要有不错的环境和财力，最新的AP305mm F3.8 Riccardi-Honders Astrograph相信也是不错的选择，今年最新产生的waiting list。相信金融危机影响，队列还不至于很长～～ ...
siqingtan 发表于 2009-10-11 17:36 http://www.astronomy.com.cn/bbs/images/common/back.gif
这个是RC么？
这个平台板够大的！
44# Elvis
Riccardi-Honders结构，遮蔽比较大，焦比小，象场平坦，摄影利器，不适合目视观测
兄弟们，等十年，还不如自己学五年！
我们什么时候能用上这样的设备呢？？？
国内已经有不少人用上类似设备了，比如北京某位同好的254mm APO和派拉蒙赤道仪
英文？？？看不懂啊
::070821_17.jpg::
那位翻译一下，让英文不好的也学习学习::luguo::
顶一个
Last weekend wasgorgeous here, so I was out on two nights with the 155mm. It was myfirst time splitting Gamma Virginis (Porrima) since it started to openup again. It's now at about 0.8". Despite crappy seeing at its lowaltitude, I was usually able to see two little balls touching eachother at powers of around 400X. I also looked at Eta Geminorum(Propus), which has the reputation of being tough. The close unequalpair was pretty easy at around 300X, reminding me of a dimmer, closerversion of Antares and its companion. I earlier tried this pair fromFlorida with the Stowaway, but got nowhere with that aperture. The mostfun I had last weekend was looking at the moon with my binoviewer. Thedetail I saw everywhere at 230x was stunning. Among the things thatparticularly caught my eyes were the hairlike shadow cast by the Cauchyfault, the U-shaped mountain range inside the crater Fabricius, therilles near Plinius which seem to run along a low, broad swelling onthe mare, and the strange buried crater Lamont. In February I had the Stowaway down at the Winter Star Party. We hadonly two mostly usable nights there this year, so I didn't get to dotoo much. I made a drawing of M42 and looked at a number of otherthings, including a section of Barnard's Loop and some extremelyobscure objects like the open clusters Tombaugh 1 and 2, which arepretty challenging for such a small scope. I spotted 8 galaxies in theFornax cluster. I tried to split Sirius, but the scope was too small.The previous year I was able to see Sirius B with the 155mm from there. In January I used the 92mm to see Comet McNaught low in the twilight.Last fall I used it and the 155mm to see Comet Swan. In June I had the 155mm out at the Grand Canyon Star Party. It has beenthere several times, and the 92mm has been there at least twice. Eitherscope entertains hundreds of tourists with views of Jupiter andwhatever else I feel like showing. They both collect lots ofunsolicited remarks about their views being the best available at theparty. I often wind up trying to explain why this is so without beingtoo insulting about the SCTs and reflectors used by most of the otherguys. I hope to make it out there again this June, and if so I willprobably bring one of the APs. Finally, I used both scopes last spring to see the fragments of CometSchwassmann-Wachmann. So, I hope this eases your mind about whether I still use the scopes. Iknow I don't write about my experiences the way I used to, but I didthat mostly back when I was still figuring out what these scopes coulddo. I now have a pretty good idea, so I tend to just use them withouttalking about it very much. If I ever get another of your scopes, I'msure you'll hear all about my initial results with that one too
挖个坟，AP175EDF听说与AP160EDF设计一样，就是重！20kg,差不多一个C14HD了。。AP160EDF才12kg，这8kg，估计镜片加厚，散热难，不过成像质量应该差不多，AP160EDF一个人还能搬，AP175EDF想动都难{:5_279:}而且贵，还是160好。
siqingtan 发表于 2009-10-11 23:16
44# Elvis
Riccardi-Honders结构，遮蔽比较大，焦比小，象场平坦，摄影利器，不适合目视观测 ...
还是AP折射镜好，目视很锐，摄影利器，好像自从改空气头后，为摄影优化了，之前好像优化目视。可惜AP大部分折射镜不是在玩天体，而是在玩命啊{:5_284:}{:5_279:}！
突然感觉没文化真不行.我都看不懂