很认真，很严谨，值得学习
谢谢观看::070821_19.jpg::
台湾数位男女
aa: 2011-02-09 11:57
酷哦...
我也想來試看看..
MANDII : 2011-02-14 17:12
Thank you
No.24 )
土星: 2010/03/19_No.6| 2011/02/23_NO.24
作晚天气有好转,也有个4,5成清吧,便在试用订造好的鱼骨板。
上次看土星的时间是去年三月份，用DC目镜后拍，拍到一粒不怎么清的黄豆那样。
作晚也试了2X 和3X 巴罗，3X 不够清。不知道是天空问题，还是那巴罗不行，还是什么了。
NO.25 )
土星: 2010/03/19_No.6| 2011/02/23_NO.24 | 2011/02/24_NO.25
本帖最后由 mandii 于 2011-2-25 09:52 编辑
US ASTRONOMY
laney50w : Yesterday, 12:05 PM from New York
Hi Mandii,
The 1st shot is really clear! Great shot!!!
__________________
Chris
sxinias : Yesterday, 01:19 PM from Europe
Mandii,
Asalways, I enjoy seeing your work that you are doing with yourequipment. You certainly are getting the most out of it and are anincentive for me and my efforts.
I followed your exampleyesterday .... nothing but coulds and rain for the past two weeks andin the offering for the next couple of weeks ..... so I'm practicing onEvia Island accross the sound from me.
Joe
________
PBalu : Yesterday, 10:24 PM from Bloomington, Indiana
Mandii, nice work. I really like the first Saturn short, really sharp. Keep it up.
MANDII : Today, 12:08 AM
Thanks all of you .
Tonight I try again 3X barlow , better than last night .
CLOUDY NIGHTS
mexjon : 02/24/11 01:48 AM from Jacksonville, FL- Merida Yucat...
Whatcamera are you shooting with, and are you stacking images, or is this asnapshot, one exposure pic? Your first image is better than anysnapshot (afocal connected to Celestron 8-24mm zoom) that I've taken ofSaturn so far.
I would imagine that you are not using a Neximageor similar video camera, right? Most of mine have been with a NikonDSLR and a Canon Powershot IS. Did you use a filter in these shots?
I like how you keep at it, and thanks for posting your progress.
--------------------
John, the gringo Mexican
MANDII : 02/24/11 04:08 AM
Well John , thank you .
Camera is the DSI-I , the color model .
First picture is used together with a 2X barlow .
As you know , the Meade DSI is a kind of CCD imager(by photo basis ) , not a kind of video device .
It takes many pictures( flames) and I stacked and handle all of them in software REGISTAX 5.0 .
Asyou can see the equipment description in the 1st Saturn photo ,exposure timming control is set at 0.077s for each photo , total 253photos is got and stacked . I didn't use a filter . But this time theMask is very helpful in focusing .
Last night as I tried the stars ,by using the Mask , I can easily see the difference when I turns thefocus . And a bright star become Sparkle as I look at the image whenit's focused well . For territorial or planets , this Mask can be usedin the similar way .
mexjon : 02/24/11 05:49 AM from Jacksonville, FL- Merida Yucat...
Ithink I'll get one of those masks. The hardest thing, I think, for mostfolks is getting that fine focus. Thanks for your reply.
rdl800 : 02/24/11 06:28 AM from Connecticut
Nice setup! ..thanks for posting..
Oneof the things I thought of when I looked at your pictures are the timesI've had under the stars in different parts of the world. I often thinkthat no matter what country or how far one travels, the stars canalways be counted on to remain the same... except south of the equator!
Cloudy NIGHTs
UmaDog : 02/26/11 12:04 AM from Long Island, NY
Thank you for sharing your images of Saturn. How about M93 next?
MANDII : 02/26/11 11:41 AM
Thank you .
Yes, I may try this one , the M93 cluster .
Because as I check it just now , it's in location about 40 degree elevation in southern side at time around 9:00 p.m in this season , that is a good timming and good position for me , because normally I can afford to do imaging from 9:00p.m to 12:00p.m , too late I need to go bed . And 40 degree is a good position . I mean easy to manupulate the scope . But just one thing that the southern sky area may get a bit light pollution in my area .
let's see it .
Need to wait good weather comes ,and bring me some clear nights .
mexjon : 02/25/11 09:59 AM from Jacksonville, FL- Merida Yucat...
Is it just not barlowing well, or is it a matter of fine focus? Your very first one with 2X is so much clearer than even this one, although this one is so much better than the other 3X. I'm sure you're going to figure this out soon.
I think maybe you should play with the frame rate a bit and see what difference that makes.
MANDII : 02/25/11 10:48 PM
Yes , John .
Actually , the reason can be much . ..
At first , if the maginification getting higher , the image should be less sharp , this is very natural . My scope is 6" aparture 750mm FL , maximun magnification should be around 150mm X 2 = 300X . I had used a 7mm eyepeice to look at the saturn that night , 7mm plus the 3X barlow equal (750mm/150mm X3 )=321 , means magnification 321 is larger than maximun allowance . So when I look at it in eyepiece , it's already getting blur , but not very blur . However , The picture captured and after processed , is better than visual observation . But I am not sure what magnification is when I am using the DSI camera . I think the FL of a DSI is very similar to an 7mm eyepiece , I mean the Focal length , but anyway , I am not sure at this point .
2ndly , the 3X barlow is good or not , I cannot know it . I got it at ordinary price . I only know the second 3X picture is better than the first one .
3rdly , the sky condition is also varies , but this should not make it differnt so much , because the two nights seems not so big difference in transparancy .
Fouthly , image process is also needed to be counted .
This time I use IRIS , not Registax .
Finally as you said , exposure timming / capturing timming can also cause the difference .
So... I cannot find out what problem is , or even if there is any problem or not , for this 3X saturn .
mexjon : 02/27/11 08:19 AM from Jacksonville, FL- Merida Yucat...
I think it would go like this MANDII. 7mm x 3x barlow would make it a 2.3mm eyepiece equivalent. 750mm/2.3mm = 326X, a little over your maximum, and a bit more than the way you figured it.
It would take some transparency to be clear at that high mag. Maybe cut down to a 2.5x barlow, and make sure it's quite high in the air. I think.
Are you sure that you are getting a good focus, or do you need to extend/shorten the train a bit to get optimum focus? I would start a new thread in the Astrophotography forum where someone who knows could help you. I will enjoy following that thread. This is, after all, observatories.
MANDII : 02/27/11 08:23 PM
Thanks for your opinion , John .
台湾
aa : 2011-02-25 16:26
6" 鏡的倍率一般在 150左右
如果大於 150倍，就會糊掉了...
MANDII : 2011-03-01 09:02
恩,我想是了。应该没有理论(理想)的150mmX2 =300倍那么高了。
US ASTRONOMY
Uncle Peter : Today, 04:50 AM from Toronto, Ontario
Great pics of Saturn Mandii.
Do you have a low-quality 3x barlow? I have a low quality 3x Barlow that can't focus properly, even when I'm looking at the moon.
MANDII : Today, 10:36 AM
Thanks Uncle Peter .
I cannot sure what the problem is caused by actually , because there is two MAIN factors affacting this blurring .
Firstly , May be the telescope has reached it's maximun magnification( 6"/F5 scope has maximun mag.=150mm X 1.5 = 225X, If I am using a DSI camera , currently the mag. using 3X barlow I estimated is around 750mm/7mm*3=321X ) , so it's already reach the maximun allowance of the scope , or it's very near to the maximun .
2ndly , the 3X barlow is no good quality . The other reasons , for example , my focusing , sky condition , and image post proccess , should not be accounted too much for this problem . Because basicly I am doing the same way as the 2X barlow did . So why the 3X image is much worser when it's replacing the 2X barlow under a very similar condition ? It's obviously the reason of telescope or barlow itself .
If I want to find it out , I need to test by another BIGGER scope , or another 3X barlow with better quality . But so far I don't want to input some money for this kind of testing . Because it's not worth to do so . Actually the 2X magnification is enough for me . The main reason is , even it's magnified , let say 3X or 5X or even more , the picture is just looks bigger . Even it can be revealled some details of the planets , but the detail is always same everytime . Means today you take this picture , tommorrow you will take the same picture , everytime is just same basicly . And also , you can only have two targets ( Jupitor / Saturn ) for this kind of planet imaging . In summary speaking , the input cost is much . But the final rewards is not so big . Let say If such investment can help in DSO imaging , that would be totally different . There is so many targets , everytime you can take different image of different DSO objects . That will have much much rewards for the changes . But the fact is that : getting bigger magnification , getting much worser DSO pictures as they are dim objects .
roverich : Today, 10:45 AM from virginia .usa
Your pics have come a long way Mandii ...Congrats Buddy .... I like the secondary binocular mount ..Great idea , Thank you for sharing with us ..
lz很认真啊，很好啊
不过效果好像不怎么理想
是什么原因呢
环境吗
谢谢,只是个人观察日记罢了,照片始终不够漂亮...
那个用了3X巴罗的土星,估计是超出望远镜放大极限吧...
US ASTRONOMY
Uncle Peter : Today, 10:35 AM from Toronto, Ontario
Hmmm, I can't seem to figure out what is wrong, Mandii.
Maybe the 3x Barlow is dirty?
bigbear:Today, 12:05 PM from michigan
Hi Mandii , excellent job!
MANDII : Today, 05:31 PM
Thank you ALL ,
Yes, that's also one possibility if the barlow is not clean enough . I should check it next time .
这铁柱上倆星期前自己设计清楚，画好量好图给深圳订造,费用一共才三百块，包上颜色，还连双筒的支架也给我免费搞好一个，其间完全不用我费心，这样的服务实在找不到别的地方了。前几天假期我一个人便到深圳把它拉回来香港 ，就那样把底铁盘上几根暴炸罗丝于地板上，便OK了，效果我非常满意。那天搞好的时间便顺便用手机照几张留档。
设计理念：
1.铁柱能高底调节，水平调节，适合不同赤道仪时作高底调整，太高太底都不行,目前调一定高度时能使赤道仪的极望看到北极星。
2.铁柱在天文台里固定的位置是要使赤道仪的纬轴（望远镜的中间）的中心点与圆顶的中心点对齐，而并不是铁柱放在圆顶的中心点正下面。因为有6公分之差, 那样才能使望远镜有较大的活动空间,这点以前用脚架时发现的。
3.铁柱顶盘要能拆,不能焊死,因应日后不同赤道仪时只要把顶盘拿去改下罗丝的孔位,便能方便更换不同赤道仪使用。
4.铁柱中间空心,目前放沙填满,以减少微震。
留个脚印，慢慢向LZ学习，观星计划和方法。
好贴，楼主很用心::070821_01.jpg::
US ASTRONOMY / CLOUDY NIGHTS
This is an Iron Pillar I installed recently . Self-design and tailor made in China( shenzhen ) for only 300 dollars .Body weighted over 20KG and Loading over 100KG is no problem as said by the shop makers . It can be adjusted the mount's horizontal water level because the ground is not plain enough .You can see the bottom two plates is clapped together by 4 big screws in controlling the maximun 10CM adjustment in height very precisely . And the mount can be put over it in different height levels , for better visual effect .In reaching certain height , the polar star can be seen in the polar scope , that's necessary for polar alignment. The pillar is firmly anchored on the ground in the DOME at a position being choosen that the center point of the mount's DEC axis is passing through the center of the DOME . Not the pillar put dirrectly under the center of the DOME , that can be resulted in maximun space for the telescope in moving all around freely . I had tested different telescope rotating positions without problem . Since it's a hollow pillar , I put much sand inside to strengthen it's resistence to small vibration , make it more stable during astro-photography .
US ASTRONOMY
ghswen : Today, 04:19 AM from Murrieta, CA
Very nice setup Mandii!
Your observatory is well constructed! Congratulations.
CLOUDY NIGHTS
csa/montanaModerator : 04/29/11 12:21 AM from montana
The pier is very nice indeed! A beautiful job for an exceptional price!
本帖最后由 mandii 于 2011-4-30 10:05 编辑
台湾:
笑笑 : 2011-04-29 19:42
問一下，香港夏天不是很熱
你那個天文台有沒有裝冷氣.. 表情
MANDII : 2011-04-30 09:49
哦。。。是这样的。
有砖墙加高品质隔热防晒涂料的，这白色涂料当时我是买最贵最好的，在国内来说，你看都快倆年了现在还依然那么白。加上门口设在南，白天把顶盖朝北开便自然有风抽进来。
隔热本来就是这工程开头设计时的主要目标，因为我白天还要用的，工作看书上网打游戏什么的，不只晚上看星。如果这天文台只能用来看星，那么在开头时我很可能不会花精力去建一个的。在我而言，这天文台主要的作用是一个密室，在天台上的一个私人工作与娱乐的密室，白天晚上都重要。
香港一年会感觉热的天时也就7月和8月倆个月，有几次下午35度时都试过了，里面还阴阴凉凉。你要是有看我山上树木拍摄照片，在另一张贴里，很多都是白天或夏天午后进行的。
日本MIZAR望远镜最近也搬来深圳用,没为了别的,就为了找找星,喜欢找星。说起来我为什么会那么喜欢找星,这个也不太知道。可能和读中学一年级自然科学时第一次在实验室接触显微镜有关吧,香港初中一年级就开始有进入实验室,当时我有一段时间下课便走到图书馆里看一些这方面的书,微观生物的世界令我印象深刻。而现在利用望远镜,恰恰相反看的是宏观世界,遥远广阔的宁宙,目镜里看似平凡的东西,欲又不平凡。本是两回事,却又是同一回事,就是在那里找自已想找的东西。。。
把其中一部望远镜搬来深圳早在去年年中就有这个打算了,一直没真的去做,现在终於搬过来了,因为有时候我一家大小也在这边的。我会在阳台看,阳台能看东和南方的天空,或且有时会上楼顶看,楼顶的北极星幸好未被山挡住,我就住在顶层。
深圳是个年轻活泼的城市,年轻人多,我住的这个房子今年也有十一个年头了,深圳这个地方有著许多许多我的回亿 ,曾经走过的街角,有美好的回亿,也有伤感的回亿。我爱香港,也喜欢深圳。回想起,当年真没想到许多年後的今天,竟然会在这个土地上看起星来了。。。
MANDII
11年五一假期
位置真好 围观一个
::070821_19.jpg::很细致啊