高质量经纬台，大家进来聊聊吧
现在镜子的上半身差不多已经齐备了。光学素质已经不错了，可以说达到自己期待的水准了。慢慢发现下半身的重要性了。前几天用200×观察木星，觉得有些抖，还有就是镜子的平衡问题。每次下来都一头汗。
很期待有一种高质经纬台，承重在15到20斤间，可以灵活转动，指哪停哪，停了以后立刻稳定，或者说没有backlash。
并且无论镜子的指向何处，都能保持平衡。最好有微动。。。
大家配合高倍观测的经纬台是怎样的？是否有我这样的问题呢？进来聊聊吧。 我在关注晶华的Z型经纬仪~~
感觉那个很不错
计划要买... 呵呵，微动装置只属于低端的经委台，好的经委台是不需要微动的，你可以找LXY问问，他还有一个 Z的是不错，我看过老外的评测，架80mm的折射没有问题，但是架102mm的折射就有些吃力了。
Z有微动，微调比较平滑。但是一个缺点就是经纬台和三角架是一体的，三角架偏矮，所以看天顶就必须半蹲了。
我估计是不能选Z了。 那LS能推荐几款么? 好的经委台是很贵的，DM6价格基本3－4万元，所以如果你确实想发烧目视的话，好的经委台上绝对不能省，您可以联系LXY，相信他的经委台不会让你失望的。
[ 本帖最后由 我爱祖祖 于 2007-8-17 10:38 编辑 ] 顶一下，lxyfuzz快要成为DIY高质量产品的标志了
甚幸，我搞到了一个他制作的TMB80镜筒。 原帖由 我爱祖祖 于 2007-8-17 10:32 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
好的经委台是很贵的，DM6价格基本3－4万元，所以如果你确实想发烧目视的话，好的经委台上绝对不能省，您可以联系LXY，相信他的经委台不会让你失望的。90007 ...
你的毒经纬台很多人消受不起的1361192_8.png
晶化的K型经纬台仰角大的时候锁死有点困难，Z型不知道改正这个问题没有。 LXY LXY ::victory:: ::victory:: ::victory:: 不是说Z型载127都不成问题么?
回复 #3 我爱祖祖 的帖子
爱祖组认为高端经纬台不需要微动的原因是这样的吗：如果经纬台好，只要轻拨动就可运动，停止以后也纹丝不动，这样就不需要微动，对吗？
这样的经纬台一直是俺的梦想啊。。。 是的，其实机械是越简单越牢靠越好，从景德的经委台到DM6，包括TV的直布罗陀，哪一个是有微动的呢？微动机构会造成整个经纬台的抗折腾性大大降低，我想可能会对载重也有要求的 爱祖祖说的有道理。
我现在用的是智通仿TV的叉式经纬台。但发现一个问题。因为这个经纬台是yoke and cradle设计，那个承载主镜的cradle自身是有重量的，所以如果镜子在水平的时候调好平衡，如果再将镜子指向天顶，立刻就不能保持平衡了， 这就需要你去锁死那两个螺丝，锁的不紧镜子又溜回到水平状态。。。
猜TV的直布罗陀也由此问题吧？ 哦 这样啊
那我看能不能自己设计一个 原帖由 我爱祖祖 于 2007-8-17 10:32 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
好的经委台是很贵的，DM6价格基本3－4万元，所以如果你确实想发烧目视的话，好的经委台上绝对不能省，您可以联系LXY，相信他的经委台不会让你失望的。90007 ...
不好意思，请问朋友：这位LXY是何许人也？他有什么样的经纬台呀？有兴趣，能上些图片来看看吗？
回复 #10 星空的旋律 的帖子
底下的评测应该就是晶华的Z型经纬仪。你可以看看。承重别多于10斤，镜筒不能太长，否则都是问题。Vixen Porta Alt-Azimuth Mount
By Joplin Motisher - 12/22/2006
I own a Vixen 80mm fluorite refractor that has been my favorite quick look telescope for about 5 years. I use it often in my yard where there are many trees that have to be avoided by moving it around. I have a small equatorial mount that is a hassle to set up and align in the yard since Polaris is blocked by a tree. I wanted a mount that would be light yet reasonably stable and much easier to set up. My ideal mount for these quick looks would be of an alt-az design with slow motion controls for high power viewing and a dovetail system to allow quick attachment. I settled on the Vixen Porta alt-az mount, which offers all of these features. Vixen Optics offers the Porta with a 70mm refractor for the same price as the mount alone and with an 80mm refractor for $40 more. I purchased the Porta and 80mm refractor outfit since the included rings and dovetail fit my 80mm fluorite. Thanks to Astromart the scope that came with the mount has already been sold for use as a guide scope.
I抳e been impressed with the performance of the Porta Mount. It is under 12 lbs. and easy to carry out the front door with or without a scope attached. Setup is a breeze and only the plastic accessory tray needs to be removed to fold up the mount. Both axes are easily adjusted to the right amount of friction using the handy allen wrench stored under a rubber cover on the mount. Motions are smooth with little stiction and there is no slipping out of position once the scope is aimed. Balance is more forgiving than with other small alt-az mounts I抳e used. I can switch from a 4 oz. eyepiece to a much heavier 1 lb. eyepiece and the scope stays on target. The slow motion movements are very accurate and smooth so it is easy to track and re-center objects at high power. The stability of the mount is excellent with damping times of 2 seconds at 175x (I should note that my 80mm weighs only 5 lbs. for the OTA and about 7 lbs. with 2?diagonal, finder, and eyepiece.)
The aluminum tripod included with the Porta mount is well suited to a mount of this size and provides reasonable stability if the legs are not fully extended. This may become a problem with longer refractor telescopes since the eyepiece position may end up being very low. In the case of my 80mm, the balance point is very near the focuser so this is not a problem. The Porta mount uses 3 socket head cap screws to attach the tripod to the mount rather than the single bolt that the Great Polaris series uses.
There are a couple things about the mount that could have been made better. The slow motion knobs appear to have metal shafts but they are actually one piece of molded plastic with metal reinforcement inside, and simply push onto the mount. The fit is too loose and this makes the otherwise excellent slow motions feel funky. The knobs can easily be replaced with higher
quality ones. The plastic tripod spreader works well now but I have to wonder about the long term durability of it.
The Vixen Porta mount is a good match with small scopes weighing about 10lbs or less and offers the benefit of both smooth motions and slow motion controls for high power tracking. It is best suited to short optical tubes (or ones that balance near the rear of the tube) due to the clearance between the mount head / legs, and to keep the eyepiece in a comfortable position. The dovetail saddle accepts Vixen style dovetails which are widely available. The Vixen Porta mount is one of the best small alt-az mounts available at a reasonable price. I will be using this mount a lot since it makes one of my favorite scopes even more fun to use.
[ 本帖最后由 leexeen 于 2007-8-17 11:25 编辑 ] 原帖由 MARTINHUANG 于 2007-8-17 11:10 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
不好意思，请问朋友：这位LXY是何许人也？他有什么样的经纬台呀？有兴趣，能上些图片来看看吗？
上面不是上图了么？ 原帖由 leexeen 于 2007-8-17 11:20 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
底下的评测应该就是晶华的Z型经纬仪。你可以看看。承重别多于10斤，镜筒不能太长，否则都是问题。
Vixen Porta Alt-Azimuth Mount
By Joplin Motisher - 12/22/2006
I own a Vixen 80mm fluorite refractor that has...
恩 谢谢~~
回复 #17 我爱祖祖 的帖子
感觉象LXY这样的精工巧匠，应该做批量生产。因为国内现在对高质量经纬台的需求还是蛮大的，有了批量，成本才能降下来，这样买的人就会更多。 原帖由 leexeen 于 2007-8-17 11:06 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif爱祖祖说的有道理。
我现在用的是智通仿TV的叉式经纬台。但发现一个问题。因为这个经纬台是yoke and cradle设计，那个承载主镜的cradle自身是有重量的，所以如果镜子在水平的时候调好平衡，如果再将镜子指向天顶，立刻就不能 ...
智通的我也刚刚收到，送去朋友那里给改造了一下，主要是配合我手里的折射，所以说虽然早买了但是也一直没有机会使用。昨天晚上我才第一次用。智通的经委台本意是给双筒做得，因为我没有见过TV的，所以感觉样子是一样的。通过昨天晚上我是用来看，折射上确实不是很完美，主要还是向下的倾角问题，这种经委台普遍都有这个问题，就是向下有很大的限制，因此很不适合看地面，这点我很恼火，后来问了一下有TV的朋友，也基本上一个毛病，不过TV得稍微好一点，包括阻尼和倾角，但是根本问题都是一样的。
昨天我把我的115架在上面，基本上是10KG左右的重量。确实平衡起来不是那么容易，尤其是115这么大的镜子，更加不方便，不过看水平的地面倒是挺好用，这对我来说已经很满足了，毕竟价格在那里呢。后来换上了80，感觉就比较好，你可以大致调节平衡就可以了，两边的罗斯通过松紧是为了调整阻尼的，因此你可以通过阻尼来弥补你不平衡的部分，因此我今后还是把115在LXY的经委台上用，智通的平日里面看看地面，玩玩80，我倒是感觉倒很方便。