ORION SKYVIEW PROtm 6 EQ Equatorial Relector Telescope

[MANDII]

这是ORION 6" F5 Newtonian ，今晚拿到了，上图！
多得论坛里的一位资深前辈TarePanda ， Thank you Panda 先:D
镜身感觉要比MIZAR 4“牛反重1.5倍左右,镜筒要比较大比较长几多吓，放在一起相比感觉是比较大多了，份量十足。

计划大半年到一年后才会正式使用，要等MIZAR 镜拍了一定数目的深空天体，个人有了一定程度的实践经验后才会更换，以提高天文摄影的质素。用的会是EQ3赤道仪，今晚和Panda 谈了很久，原来我那部EQ3当年也是出自他手上的，呵呵。而且他说那部EQ3是有办法改成导星用的，那对日后有需要时，当然会是个很好的消息。

今天是2010年的6月8日，查记录上次拿镜子（MIZAR）回家是2009年12月9日，刚刚好满了半年，世事有时真的很考合。

购置经过：
1） http://www.hkastroforum.net/viewtopic.php?t=19564
2） http://www.hkastroforum.net/viewtopic.p ... 73&start=0


MANDII
2010/06/08

[marco1415]

原來買了新玩具!panda這支鏡質數很好,好0野尼0架

[MANDII]

原來買了新玩具!panda這支鏡質數很好,好0野尼0架

收倒风啦。

[MANDII]

MANDII : 星期一 21 六月, 2010 14:32
你好，你系卖配件的吗 。
有无图中，part 1 和part 2 的呀？
我那部是Orion 6" F5 skyview Reflector 。

Part 1 系要接一个Finder ,个连接坐不见了。
Part 2 目前系可放1.25"目镜的focuser ,我稀望整到可以放得落0.965"的目镜,因为我有好多目镜都系0.965"的。加个1.25"->0.965"的adpater 有吗？甘样不用adpater时我又可以用1.25"目镜。


LT :星期一 21 六月, 2010 19:42

Hi MANDII,

Yes, I have them in stock.

But for part I, it is sold together with a 7x50 finder bracket. That means the base can't be sold to you solely. The price of the whole set is HK$XXX.

For part 2, it is a Vixen product and the price is HK$XXX.

7x50 star finder is in stock also if you need it together with the finder bracket.

LT



MANDII : 星期一 21 六月, 2010 22:41
I see .
Pls leave me your phone no.
I will call you latter .
I may need them early next month , at that time call you .


LT :星期二 22 六月, 2010 08:02
Hi,
My cell phone no is XXXX XXXX, and please call me when you need them. But I will leave HK from July 11 for 2 weeks.

LT


MANDII : 星期二 22 六月, 2010 09:51
Understand , Basicly if they can be used , I will take all of them on / before 4th July .

[MANDII]

view finder 9尾坐已装好。
1.25"->0.965" adpater暂时没货,要等迟些LT得闲车番个。

[MANDII]

台湾论坛 <倆支牛反合拼用>

MANDII : 2010-07-29 15:04:54

本人有倆支现成的牛反想改装，请教一下。

怎样把4“ 和 6” 牛反合拼用 ？（ 600mm和750mm FL ）
要能把倆个目镜部位改成合二为一的单一目镜用，光力加强,拍摄更好。
经初步做了一些功课，理论光力计算为 4*4 + 6*6 = 52 > 7*7
那就比一支7“的牛反强一点了。

求解毒良方。


peter : 2010-07-29 15:31:52

see

http://hackedgadgets.com/2008/12/09/22- ... telescope/

or
http://www.flickr.com/photos/seangraham ... 224475560/

other
http://www.spybinoculars.info/binocular ... ope-58.htm

http://www.stargazing.net/wvas/BigBinocs/Binocular.htm
http://www.company7.com/jmi/rbseries/rb16_data.html

[MANDII]

KH : 2010-07-29 15:47:37
不同焦距變雙筒?? 是不是需要三思一下

另外， 同軸是不是另一個大問題，

口徑不同 變雙筒 那左右眼亮度也會有差異吧?

如果如題意是要2合一 兩支變一支，牛頓鏡應該沒有人這樣用，倒是我的學長做過double Cassegrain的光學分析作為碩士論文，結構是用兩組4片反射鏡為望遠鏡的系統, 細節倒是忘了，因為那時還不是很了解這些光學的東西

[MANDII]

HCL :2010-07-29 16:03:56
想不出解法.
不過既然有此一問, 想必心中有譜, 能否分享一下? 好奇得很.

MANDII : 2010-07-29 16:49:59
噢,谢谢大家的宝贵意见。其实是这样的.. .
我目前在用4"牛反,收藏了一支6"牛反,倆支我都喜欢。
因为一心不能二用，计划半年后我用6“那支镜，而无法再用4“那支。那样感觉有一点可惜，我不想那样。
因此这倆天便想到把倆支镜改装合拼用的念头来，那样合成后如能有效地用，外观也会壮观好多，这点非常的吸引我去做这事。
至于合成的方法，我也不太清楚的实际上，只知道按道理我用倆支镜总有办法可以用得更好吧。

”重点目的是只要合拼后能正常目视，而且又能做一些拍摄，那就很好“

我原意是合二为单筒那样用，但现在看了上面的，也不排除做为双筒用，双筒便有更好的目视效果，但拍照就等于和原来单筒没分别了，因为我也只有一部相机。而如果是合为单筒用，那就目视和拍照都会比较好（按道理上来说，如果成事）

目前看来你们说的，合为单筒看似有点高技术才能做得到，而合成双筒我看了上面的例子，他们都有一个共通的地方，就是倆个镜子是一样的！！ 而我的是不一样。。 。

还是再期待一些方案来


MANDII : 2010-07-29 17:18:48
当然要达成目的，还有其它方面的要克服，比如如何把倆支镜安装在一起才最合适，
以及赤道仪的载重和跟踪性能是否能配合得到，等等。。 。
因此，稀望能收集一些意见，评估一下做这事的可行性高不高，
稀望能在这半年里，提早解决问题来。

目前先要弄清楚的是目镜部位的问题 ！
这问题如能解决，其它的都好办。

[MANDII]

MANDII : 今天 10:23:05

Peter兄 和 KH兄 ，

我现在觉得改做双筒或许还有一点稀望,如能成事，那也非常好的在目视上，
我也有过用双筒的经验，双筒成像很有立体感等等好处是知道的。
仔细地看了一下上面的那份光学图后，现在可以断定改为单筒是不可能了，是我能力以外的事。

有几个问题关于改成双筒的想问下你们倆位的，请指教。

1.上面第二幅和第三幅图中的倆部大型双筒，组成的是不是倆支牛反镜来的，是跟一般牛反一样的光学架构吗 ？

2. 如果透过某种方法使影像大小一模一样（比如用不同目镜使放大倍数一样）,那么双眼观看时，成像是不是就会重合的？我以前用双筒时，那倆个目镜是要相隔要一定距离才能重合影像的，同样道理，我倆支牛反的目镜也要相隔有规定，这个相隔距离是有什么根据的，怎样计算的？

3.假设倆个影像能重合，那么一个光，一个暗，但看起来也只可能有一个亮度，那光暗就不成问题了吧是吗 ？
那么重点问题就在于怎样重合影像。还有就是，就算能重合了，是不是就等于就有立体感了 ？
是不是就跟正统的双筒有同样的效果 ？因为毕竟牛反跟双筒的光学架构本身是不同的。

4.要能重合倆个影像，除了以上的焦距，光暗，倆个目镜距离，还会不会有其它什么因素在影响的 ？


我就是没法试那倆个牛反现在，因为固定好了不想大动作拆开试。
稀望能先从理论上讨论问题，也欢迎其他人指教。

[MANDII]

US ASTRONOMY FORUNM
<<Two Newtonion combine to use>>

MANDII : Yesterday, 07:00 AM
Dear All ,

I have two newtonion scopes and now want to combine them to use as one bigger apperture scope . Purpose is to gain more object lights ,such that it can have better visual and imaging effect . But question is how the two eyepieces can be combined into one only , and a better one as well .

Is there anyway to do so for this change on the eyepiece portion ??

The two scopes are 4" & 6" aperture , 600mm and 750mm Focal length . In theory speaking of aperture calcualtion , 4*4 + 6*6 = 52 > 7*7
That is ,it should be a little bit better than a 7" newtonion scope after combine them .

Best Regards
MANDII


DaveW Yesterday, 02:31 PM FROM Saskatoon, Canada

Are you talking about using them as a binocular telescope, or doing optical interferometry? If it the interferometry, that would be a very impressive and cool amateur project if it (reasonably) possible.


sxiniasYesterday, 03:17 PM FROM Sxinias Marathon Greece
Mandii,

That is an ambitious project you have. How to combine the two light paths from two mirrors with different focal lengths into one light path with a common focus point? You may be able to do this using an off-axis design such as a variation of the Herschelian reflector (tilted primary mirror eyepiece at the front, no secondary mirror. This design suffers from astigmatism and distortion varying inversely with the focal length. I would suspect that collimating such a telescope would be extremely difficult and the different angles of the light path from mirrors with different focal lengths will make achieving a focus through an eyepiece a challenge to say the least.

[MANDII]

MANDII : Today, 11:50 AM

well , so according SCINIAS saying , it's difficlut to combine the two scope as one . that's impossible of my skills & knowleage to do so as well .

And according DaveW , it seems I still get another choice to make it as an binocula .
So ! I would prefer to go on this project , to work it out as a binocula ! If there is any possibility to do so .. .

To make a binocula , there is advangtage and meaning in my sense for this time !

1. The combined two scopes looks tremendously BIG , ha ha !
I like this kind of giant mechine . That is the most attractive reason !

2. It can have all the visual advantage of Binocula , such as more 3-dimentional and solid . and others .. .

3. It still can be used as imaging system by one of the eyepices , and same result of using one of the scope as currently doing so . Of course , assuming the mount still be able to do so .


Then , what I want to know more now , is that how can I make a binocula by these two scopes ? I hope to collect more information from the forunm , to see if my ability can still enough to reach to the level , to work out this project .

Welcome everybody's suggestion .

[MANDII]

台湾:

WYK : 今天 10:49:57
順便問一下這種光學系統值值不值得稿
我只想的到增加集光力其他好像沒啥好處

[MANDII]

MANDII：今天 12:27:14
谢谢你的意见,现在去留已决，从各方面看来，改做单筒不太可行.
你那是单筒方案是吧，我能力不够。
唯一出路是双筒方案 ！我稀望大家能深入探讨双筒方案来。

[MANDII]

SCINIAS Today, 02:00 PM from Sxinias Marathon Greece

The problem I see with bionculars is that these scopes are newtonians. I just can not think of a way to positioning the eyepieces where you can see through both at the same time. Also, since they have different focal lengths, getting the same image size will be difficult.

I think that the only way really to combine the two is to put some sort of very sensitive camera in both and combine electrically. What camera and how to do this, I don't know.

If you are wanting a larger aperture telescope, you may be better off just buying one. A less expensive solution is to construct your own telescope if you grind your own mirror, make your own components, etc. You can even silver your mirrors at home. I suspect that this will be less expensive and produce a better telescope than trying to combine two telescope mirrors of different focal lengths into one optical train.



MANDII : Today, 03:09 PM
Dear SCINIAS,

Buying another new bigger scope , I don't want , probably may not just because of the money .

For this time ,my purpose is : To fully utilize my all equipments , as much as possible . And to use them instead of put away in somewhere , to get used of them in my usage . That is the main point actually !

As I had said , it would be a much bigger telescope , Ha Ha .
And that's very attractive to do so for me .

So.. . What ever way I can use the two scope at same time , I am ready to go with that way . I will consider again your alternative suggestion on the camera , instead of changes in eyepiece .

So, pls let me think sometime so far , and I may list out some questions to ask you for the whole modification direction , and welcome others to join for this discussion as well .

[MANDII]

MANDII : Today, 04:11 PM

Firstly , one camera can only use with one light beam( scope) .
If there is two light beam , we can only combine( technically impossible for me to do that ) to one stronger light beam to use with that camera ,or alternatively we can use two cameras . Two camera means two pictures at same time ,
however, it only means double the number of pictures at same time ,but not better pictures of each one .
So final result is ONLY that I can finish the whole imaging process more earlier , but that is not my concern .
I have much time actually for my shooting each night .
2ndly , changes on the camera has nothing to do with visual improvement. And it's expensive to use two cameras .

Thus , I guess there is no way to do with the camera , a normal camera .

So, we should concentrate on the eyepiece modification , on a binocula scheme proposal !
Once this eyepiece problem can be logically clarified , the other problem( such as the mount, or how the two scope is holded together ) is just minor problem.

For eyepiece modification , there is several reasons to support me to go with that way possibily .

1. A Normal binocula contain two eyepieces , human eye can see through the two eyepiece to look at far away objects .
My two newtonion also have two eyepieces , so there is no reason the same human eye can't use it in the same way .

2. The focal length is different , but we can change the focal length , such that image size is same .
for example , we can use two different eyepieces to produce the same maginification , or we can reduce the 750mm to 600mm by 0.8 barlow to make it same .

3. The light beam can be changed in direction by adding some mechanics of prism .
By adding some kind of prisms , I can change the two light beam for ANY direction that would be suitable for my two eye to look at . Of course , a comfortable direction to use the two eyepieces of the two newtonion scope .
And this prism structure can be attached and detached easily . Such that I can shifted easily between visual and imaging purpose .

4. Don't forget I still got two differnt scope at same time for imaging .
I can choose any one of them easily when shooting different objects .
That is also a benifits to use with two scopes at same time , besides the visual advantage of binocula .

5. So what else I should consider to make a giant bicocula scope ??