图像不可用

暂无所选定颜色的图片

要观看此视频，请下载 Flash Player

Focal Reducer, Black

页面含机器翻译，中文仅供参考，以原文为准

Celestron 星特朗

434 评论

目前无货。
欢迎选购其他类似产品。

这款焦距减距器和场地矫正器镜头配件适用于所有 Celestron 5 英寸、6 英寸、8 英寸、9 1/4 英寸、11 英寸和 14 英寸 Schmidt-Cassegrain 望远镜
这款巧妙的配件使您可以拥有双焦比仪器,而不会牺牲图像质量
减速器/修正器是 f/6.3 适用于 C5、C6、C8、C9¼ 和 C11 望远镜,f/7 适用于 C14 望远镜
原文
- This combination focal reducer and field corrector lens accessory works with all Celestron 5", 6", 8", 9 1/4", 11" and 14" Schmidt-Cassegrain telescopes
- This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality
- The Reducer/Corrector is f/6.3 for C5, C6, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope

基本信息

制造商是否已停产 ‏ : ‎ 不是
商品尺寸 ‏ : ‎ 5.08 x 5.08 x 5.08 cm; 109 克
制造商 ‏ : ‎ Celestron
ASIN ‏ : ‎ B00009XVHZ
型号 / 款式 ‏ : ‎ 94175

亚马逊热销商品排名: 商品里排第43,304名运动户外休闲 (查看运动户外休闲商品销售排行榜)
- 商品里排第41名天文望远镜

用户评分:
434 评论

商品描述

这款组合焦距减速器和场地矫正器镜头配件适用于所有 Celestron 5 英寸、6 英寸、8 英寸、9 1/4 英寸、11 英寸和 14 英寸 Schmidt-Cassegrain 望远镜。这款巧妙的配件使您可以拥有双焦比仪器,而不影响图像质量。减速器/校正器为 f/6.3,适用于 C5、C6、C8、C9¼ 和 C11 望远镜,f/7 适用于 C14 望远镜。如果使用任何 Schmidt-Cassegrain 望远镜提供宽视野。用于天文摄影,可减少 3 个因素的曝光时间。 Celestron 不提供 f/6.3 Schmidt-Cassegrain 望远镜,因为设计不实用,中央障碍大,形成对比度损失。这增加了无法为某些物体使用更长的焦距,导致 Celestron 设计四元素、全镀膜 f/6.3 减速器/矫正器。视觉和摄影效果都令人惊叹。 #94175 减速器/校正镜头与 Celestron EdgeHD 光学系统不兼容。

想了解具体信息？

查看问题和答案

无买家评论

5 星 (0%)		0%
4 星 (0%)		0%
3 星 (0%)		0%
2 星 (0%)		0%
1 星 (0%)		0%

评分是如何计算的？

评论该商品

我要写评论

此商品在美国亚马逊上最有用的商品评论

美国亚马逊： 129 条评论

Mike

Works flawless

2023年1月10日 - 已在美国亚马逊上发表

已确认购买

I should have bought this from day one. Awesome results

Howard W. Hudson

Great to see the whole object like the Moon or the Sun and not just a piece of it.

2022年5月18日 - 已在美国亚马逊上发表

已确认购买

I purchased this focal reducer a couple of months ago but had not had the chance to use it until this past Sunday May 15th 2022 when I went to the University of Arizona and setup my scope with others who were there. I was using my Celestron Nexstar 8se and Star Sense to get it aligned with and a 40mm eye piece. I had noticed others were using their phones to get pictures and getting some decent ones at that so I thought I would give it a try and the pics aren't bad even if I do say so myself. I can see I'm going to be using this reducer a lot especially with the 8Se. My next step is to try and get images of the Sun as soon as I am able to.

1 个人发现此评论有用

Railbird

Solid Construction, As Advertised Optical Performance.

2017年4月30日 - 已在美国亚马逊上发表

已确认购买

My main motivation for buying this was to fit the sun (and moon) into the field of view of my APS-C (24 x 16 mm) camera sensor using my Celestron 8" SCT (2000 mm FL). Using a full frame sensor is not an option since the C8 will vignette. This device also allows a slightly wider field of view and lower f-number for deep space object astrophotography.

Handy reference numbers for those wishing to photograph the Eclipse or just the entire moon: Max focal length when using an APS-C camera is about 1260 mm. When using a full frame, about 1900. But only if you can center the target and keep it centered. (To photograph the moment of eclipse use 400mm APS-C/600mm Full Frame and no solar filter.)

This device is not useful for solar system astronomy, except the sun or moon, or when using eyepiece projection photography. But you can always just take it off.

One huge advantage of this device is that you get just about the same performance as you would with an Edge HD telescope, and the field flattener costs half as much. If you buy an Edge HD 8" OTA you get a built-in field flattener, but still have the longer focal length, and hence smaller field of view and slower f-number. To see the whole sun or moon, or a more of the Pleiades in a camera, you would have to buy another focal length reducer, about $300 bucks. Since the Edge HD comes at a $400 buck premium over the SCT you spend an additional $700 bucks to get to the same optical setup you get with the the SCT plus this item at about $150 bucks. Go with this plus the SCT and save $550 bucks, and you will even have less glass between you and the stars to boot.

The construction is very solid, you should have no problem hanging a DSLR (or better a mirrorless camera) off of this thing.

25 个人发现此评论有用

Night Sky Fan

Visual or Video -A Great Accessory

2011年10月24日 - 已在美国亚马逊上发表

已确认购买

I am sorry that I did not buy this accessory two years ago. It all began with a used Celestron C5. Then I bought a very nice used Nexstar 8SE and thought wow, I should have done this go-to thing sooner. After a year or so, I moved up to a new Celestron CPC925 and decided to explore video astronomy with an inexpensive Samsung SBC-2000 security cam. Most SCTs have a focal ratio of about f/10 (focal length divided by aperture) but a camera works better with a faster (shorter focal length) scope. The usual way to do that with a video camera is to screw on a small .5x reducer. So I bought on of those for $35 and was just amazed at the detail and colors in the Dumbbell Nebula. Then someone over at Cloudynights.com suggested that try adding a f/6.3 reducer (stacking reducers). So I bought the f/6.3, screwed in on the back of the CPC925, replaced the visual back and diagonal, mounted the camera (without the .5x) and stayed up until 2AM looking at the Orion Nebula. Before heading for bed, I pulled the camera, put in a 20MM 68 degree APOV eyepiece, and had another "Wow!" moment.

The Celestron f/6.3 reducer-corrector really brightens the image, widens the field of view, improves contrast and detail, and flattens the image improving the look of stars near the edge of the field of view. Many people leave them on all of the time except when looking at the moon and planets or other high magnification situation.

There are other and cheaper reducers on the market and they do work. However not all of them offer the same degree of improvement at the edge of the field of view. Rod Mollise writes "...6.3 r/cs are one of the best--if not the best--SCT accessories to ever come down the pike" and "I'll put it this way...the 6.3 rarely comes off the rear cell of the C8."

64 个人发现此评论有用

Jahan Dawlaty

Worked well, easy to install

2021年7月30日 - 已在美国亚马逊上发表

已确认购买

I put this on my celestron 8se SC telescope with the goal of increasing the field of view (because I have a zwo asi224mc camera with a relatively small sensor area). It was easy to install and worked quite well. Before buying it, I was worried that the focal plane would shift so much that I would not be able to focus within the limits of my focusing knob. But that worry was unfounded and I got to focus easily. I could fit the Dumbbell nebula with enough contextual background in the field of view of my camera. As far as I could tell, I did not observe significant vignetting. My plan is to leave it in the back of the telescope forever and only take it off when doing planetary observation or imaging (which requires higher magnification).

3 个人发现此评论有用

互联网药品信息服务资格证书(京)-非经营性-2018-0231	京公网安备11010502030232号	京ICP备11014788号

增值电信业务经营许可证:合字B2-20090004	营业执照:91110000717883277U	出版物经营许可证

Celestron 星特朗 C 望远镜 Celestron f/6.3 减速器校正器 {"isOriginalText":"true","showTooltip":"false","tooltipContent":"中文翻译，点击查看"} 原文 Celestron 94175 Field Lens Corrector/Focal Reducer, Black 页面含机器翻译，中文仅供参考，以原文为准

基本信息

商品描述

想了解具体信息？

无买家评论

评论该商品

此商品在美国亚马逊上最有用的商品评论

Celestron 星特朗 C 望远镜 Celestron f/6.3 减速器校正器

原文

Celestron 94175 Field Lens Corrector/Focal Reducer, Black

页面含机器翻译，中文仅供参考，以原文为准