a*******e
发帖数: 3021 | 1 明白了，严重考虑你说的那个，再说还可以看鸟呢 :D
谢谢
eyepiece |
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a*******e
发帖数: 3021 | 2 买了c90了 :D
老大能不能到cloudynights 那里帮我推荐几个8-9的eyepiece阿，我市一窍不通阿 |
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a*******e
发帖数: 3021 | 3 元旦前收到了c90
这几天月亮都是后半夜出现
前天早晨月亮还在半空，用c90看了一下，好小阿，而且还不清楚
是因为大早餐月亮不亮了？
还是它自带的eyepiece不能用来看月亮，得买8-9的？
别怪俺的问题小白阿，哈哈 |
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a*******e
发帖数: 3021 | 4 这是直接32mm的eyepiece拍的？
我还没买8-9的呢，也还没再试试，等下旬月亮出来了再说
另外我把优胜美地和zion搞混了，哈哈，没去过优胜美地，是zion太失望 |
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d****n
发帖数: 97 | 5 How to connect a camera to a telescope?
Camera: Canon EOS digital Rebel XT
Telescope: Meade ETX-80AT-TC Astro Telescope with AutoStar
Canon EOS --- T-Ring <----> T-adapter - telescope (1.25'' eyepieces)
A T-Ring couples your 35mm camera body to a T-Adapter, Radial Guider or Tele
-Extender. This accessory is required if you want to do any type of
photography through a telescope or spotting scope. Each camera manufacturer
has a different mount, which requires a specific T-Ring.
To use |
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w****i
发帖数: 155 | 6 EP: eyepiece， 目镜
OC是笔误， 应该是CO： central obstacle，大小除了影响摄光量，主要的影响是对比
度， 在看木星的时候最明显；一般认为小于20%的CO就和没有CO在对比度的区别上可以
忽略不计了。 |
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w*******e
发帖数: 285 | 7 我最近刚买了meade etx80，但是感觉对焦不是很清楚，用25mm的eyepiece还可以，但
是再用10mm的就很不清楚，对焦达到最好的水平看木星也看不出什么条纹，土星也就是
两个耳朵，感觉比朋友的一个很就的4.5寸的牛反看行星细节差了不少，也就可以看看
月亮，看看猎户和仙女座也还凑合，请问这就是这个望远镜能达到的水平吗？还是我买
的这个质量有问题？折射镜有办法调整吗？ |
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w*******e
发帖数: 285 | 8 我最近刚买了meade etx80，但是感觉对焦不是很清楚，用25mm的eyepiece还可以，但
是再用10mm的就很不清楚，对焦达到最好的水平看木星也看不出什么条纹，土星也就是
两个耳朵，感觉比朋友的一个很就的4.5寸的牛反看行星细节差了不少，也就可以看看
月亮，看看猎户和仙女座也还凑合，请问这就是这个望远镜能达到的水平吗？还是我买
的这个质量有问题？折射镜有办法调整吗？ |
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k******a
发帖数: 2436 | 9 I took some moon photos with a DSLR + t-mount adapter and a t-mount lens. A
friend is asking how I can mount the DSLR to a real telescope. For a long
time I always thought you need to remove the eye piece, then connect the
DSLR to the telescope via t-mount.
But he said I should connect DSLR to the eyepiece. Is this true? Can someone
tell me your experience? |
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w*******y
发帖数: 60932 | 12 Nikon D5100 Digital SLR Camera w/AF-S 18-55mm VR lens $600 after competitor'
s coupon at Staples (in-store or in-store kiosk) 10/30-11/05 YMMV w/ Nikon
55-200mm AF-S DX VR Zoom-NIKKOR Lens $720
From Sunday 10/30/2011 thru 11/05/2011, use the OfficeMax 20% off coupon at
Staples either in-store or with a kiosk order on the Nikon D5100 Digital SLR
Camera w/AF-S 18-55mm VR lens : $749.99 - 20% off = $599.99
Staples also is offering a discount on the combined purchase of this camera
kit and the Nikon... 阅读全帖 |
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G****e
发帖数: 1480 | 13 掉了。。。有地方可以买个replacement么？
ebay 搜不到 xpan 的，劳烦大伙给个关键词？
多谢！ |
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G****e
发帖数: 1480 | 17 原来叫Viewfinder,Diopter. 多谢！ |
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d****n
发帖数: 97 | 18 How to connect a camera to a telescope?
Camera: Canon EOS digital Rebel XT
Telescope: Meade ETX-80AT-TC Astro Telescope with AutoStar
Canon EOS --- T-Ring <----> T-adapter - telescope (1.25'' eyepieces)
A T-Ring couples your 35mm camera body to a T-Adapter, Radial Guider or Tele
-Extender. This accessory is required if you want to do any type of
photography through a telescope or spotting scope. Each camera manufacturer
has a different mount, which requires a specific T-Ring.
To use |
|
w****i
发帖数: 155 | 19 EP: eyepiece， 目镜
OC是笔误， 应该是CO： central obstacle，大小除了影响摄光量，主要的影响是对比
度， 在看木星的时候最明显；一般认为小于20%的CO就和没有CO在对比度的区别上可以
忽略不计了。 |
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K*******n
发帖数: 4307 | 20 问你个问题，帮一个朋友问的，她不好意思去物理办
设计 Huyghenian (HM) or Ramsden eyepiece
Focal length: 10mm
Diameter: 100-120mm
Apparent field of view: 70 degrees
Eye relief: >15mm
we want to use lens with large diameter to achieve large apparent field
of view. is this feasible?
有啥可以推荐看的么？谢了先 |
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K*******n
发帖数: 4307 | 21 她这么说：
the目视界is not enough and we could not find any eyepiece with such good
目视界。so we are thinking that increasing the diameter may work but it
is difficult to build complicated system by ourselves and it is expensiv
e too. therefore we are thinking if it is possible to use simple design
but large lens. |
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