[发现] Orion 新出的100 毫米口径ED APO镜

http://www.telescope.com/shoppin ... mp;iProductID=54904
刚才上网无意中看到的，100 毫米口径FPL53 低色散玻璃，焦比9.0（镜筒较长），两片设计。报价999美元，比较值啊！

不错的东东，FPL53再加上长焦比，色差应该非常小！
 但焦比好像太小了，摄影应该会比较麻烦吧？

也许是国内生产的……

香港同好已经说是国产的了。价格觉得有点贵

看介绍镜头好象是在日本OEM的。

Orion的镜桶做工实在不怎么样，999美金中大概有899美金是用在镜片上。

好钢用在刀刃上！

听说是苏州Synta产的.

20/20 received it's dealer alotment of 1 OTA and 1 SVP version
Thursday 8/13. First chance to test these out was on Saturday night,
we mounted one on a Celestron CG-5 computerized mount & took it for
a spin at the Indiana Family Star Party. I'm not a "refractor snob",
I personally prefer scopes with enough aperture to see faint objects
with.
My impressions- The optics in this scope are first rate. With these
in the showroom I seriously doubt that I'll be able to sell any TV-
102s. (The TV-102 is an F/8.8, by the way) The ED80s pretty much did
in the TV-85s. The focuser on this telescope needs some reworking, I
think that possibly simply adding a MotoFocus to it would clean up
it's worst attribute, mainly that it slowly slips with a heavy load.
The ED80 will continue to be a better choice for the photographer
with it's faster F ratio and friendlier tube size for piggybacking.

Everybody that looked through this scope at IFSP said "Wow!".
The ED100 is a 100mm F/9 "Wow" scope for $999. It is the lowest
priced 100mm non-achromat refractor OTA on the market that you can
pick up your phone and have next week. If you must have a perfect
scope, I'll happily sell you a TV NP-101 - just be prepared to spend
a little more for it, because perfection ain't cheap.

Chris Brownewell
20/20 Telescopes
www.2020telescopes.com

好象还不错，为达到满意程度，还需要一些后期DIY

Here is my optical evaluation.

I have posted photos under Orion 100 ED images to the Files Section.
They may be helpful.

We had a front come thru, this cool front is very unusual for mid-
August in Louisiana. This gave us early October weather. We have
not had pristine blue skies like this since early May.

I did not pull my toys out until after midnight. So all testing was
on the 14th. The Orion ED 100 mates well with the TeleVue clamshell
that is available separately for the TV 102. I mounted the scope on
a TV Gibraltar mount (Pictured in the Files Section). First focused
image was the star Vega. No discernable color halo around Vega.
Inside of focus gave me nice concentric bullseye type circles (see
image in Files) and I was happy with that. Outside of focus was not
so definitive. Sky was unsettled as evidenced by all the swimming I
could see in the out of focus image.

The Orion 100 ED could not split the Double-Double with either a 24
mm (37.5x) or 19 mm Panoptics (suspected in this one at 47x). It was
a clean and easy split at 128x with a 7 mm Nagler. Note that I
repeated this with the Vixen 102 and had the same results. With the
Vixen the magnifications with these 3 eyepieces are 42x, 53x and
143x. I suspect that with better seeing I would be able to split the
Double-Double with the 19 mm Panoptic with both scopes. I at one
time had an excellent Sears Discoverer 76 mm f/16 refractor. It had
great optics and could routinely split the Double-Double with a 28.7
mm RKE eyepiece (42x).

Initially I thought my timing was poor in that I had no good
chromatic targets (Sirius, Venus or the lunar limb). I attributed
the lack of a blue halo with Vega to the fact that it is not really
seen that well, even with an achromat. This proved to be wrong when
I pulled out the University Optics 80 mm f/6.25 and looked at the
same target. Oh yeah! I remember, there really is more than enough
chromatic aberration on bright stars like Vega with an achromat. The
Vixen 102 came out next and once again our "Contact" star was Vega.
The bright blue halo was unavoidable and unmistakable. Clear as
day. There really is something to be said about the Orion ED, it
really does suppress color. Looks like a keeper! Now to solve the
focuser problem.

I did look at other objects with the 100 ED including the Double
Cluster, the Pleiades and gamma Andromeda. They looked great!

I will not be retesting the 100 ED from the country tonight. Weapons
of choice will be a Tahakhashi FCT 76 since I will be doing some
solar observing later this afternoon. I will use it tonight to look
at Vega. Perhaps I will shoot some more photos and see what we get.

Let me know if there are questions.

Barry Simon

看来是个用于目视的好东东！

999美元包不包括自动导星赤道仪？如果不包括，不值。

你这个价能给吗？？？

最初由 denebman 发表
[B]好象还不错，为达到满意程度，还需要一些后期DIY

国内做的东西就是这样, 从来没有拿到手就是完美无缺的, 和EQ6一样, 看来国内做高端产品还差一截, 别人给的评语最多也就是因为价格便宜所以心理比较平衡.

最初由 求是 发表
[B]999美元包不包括自动导星赤道仪？如果不包括，不值。

对呀，给个估价吧，毕竟这个100 毫米口径ED镜OTA是市场上看到的最低价了。

如果真如广告宣传，使用了FPL53玻璃（人工合成萤石，阿贝数95.0），再加上F9.0 的焦比，目视效果应该十分满意了。

不过现在这个潮流，如果不是为了便宜，买了这么长的镜子也麻烦啊。
     还是短焦点的好，不过orion的经筒质量的确差。

这个镜子不怎么长啊, TV102, FS102都是差不多长的. 其实我觉得F9的焦比非常高明, 保证了低色差, 而观测起来又非常舒服, 我对TV102深有体会.
这个镜子对中等发烧程度的爱好者应该是很实用的, 尤其是月球观测应该有非常好的视觉效果.  色差矫正应该和TV102相当. 像质就要看加工精度了. 如果要生产更短焦摄影为主的镜子, 应该考虑三片式的. 不然色差太大, 骂的人更多.

缺点是价钱有点略贵, 如果是$800-$900就完美了. 不过这个镜子目前需求量太高, 估计d短期很难降价

而且国产的镜子要能注意细节, 把机械质量提高才能真正成为市场的宠儿. 不然满足于低价取胜是得不到利润的.

最初由 求是 发表
[B]999美元包不包括自动导星赤道仪？如果不包括，不值。

打击别人, 抬高自己? 全新售价低于1000美元的4寸APO还不值? 还得带上自动导星赤道仪？就这么"求是"?

哈哈，这个档次的东西，至少他们还做不出来~~~~~~~~