查看完整版本: TEC140一些评测

TEC140一些评测

第一个镜头:lol hwa$NU
[attach]13011[/attach]'F*}Z$H&C-@W#v!j0fr
140APO objective #0014b2Xg[fgh
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TEC opticians Edward Trygobov and Alex Richenko holding a TEC 140 in the raw)f"bh5X*El+}

TwvZ8|:s [[i] 本帖最后由 siqingtan 于 2008-8-28 17:46 编辑 [/i]]

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1O tC5{1`.nJ [font=Georgia][size=2]Color correcttion for high quality Fluorite oiled triplet[/size][/font]
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{(~PR@`Q3v U [font=Georgia][size=2]Designed and measured correction of APO140 #06X[/size][/font]
o6]-M |V:b%t+[ [color=#9136ad][font=Georgia][size=2][color=dimgray]Color diagramm of different stars[/color][/size][/font] [/color]
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Z [url=http://f1.grp.yahoofs.com/v1/EGm2SGwCb04Ju01gFqcheSYdZeH2txYHqPxuKMP1gAgXoHxng5a4ujn5wPhNVcLj-pQKUIfYpMiCjNe2ODIn_GnCYHpjjAM/Color%20correction/140%20%2B130%20APQ.jpg][attach]13021[/attach][/url].` Z
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Qn7Rb%r*Z| [font=Georgia][size=2]New rings for APO140[/size][/font] @
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nm)e!?8a I)pY2] [url=http://www.astromaniak.pl/viewtopic.php?t=1171]http://www.astromaniak.pl/viewtopic.php?t=1171[/url]
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&@Rty"t [[i] 本帖最后由 siqingtan 于 2008-8-30 18:29 编辑 [/i]]

[color=black][attach]13023[/attach]~y }%b-HM[6U
[/color]
)z2W4k\W`'|I [color=black][attach]13044[/attach][/color]
!}4eJ1d*LS,c3[B!s r [color=black][attach]13045[/attach][/color]
o+|3~8^p [color=black][attach]13046[/attach][/color]
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C [color=black][attach]13047[/attach][/color]
]'Ojh%Ivf.W.z/L [color=black][attach]13048[/attach]
~YPtr:S0\H [/color][color=black]
%R{V KrOV"~ [/color][size=3][color=black][font=Georgia][color=blue]Test in Japan (vs. AP155)[/color][/font]
a(S+L1V&Gt%j0Boy~ Ncve/zO Y k
[/color][/size][size=3][color=black][/color][/size][size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][size=3][color=black][/color][/size][/font][/size][/align][size=3][color=black][/color][/size]
q c8]#k0ZIR [font=Arial][color=black][size=12pt]when it comes to thorough > testing and his one drawback is that maybe he is not[/size][/color][font=Garamond][size=12pt][/size][/font][/font][size=3][/size]
n&unu}
o Z!w [size=3][color=black][/color][/size]
!c/fk9r EXgN [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]very diplomatic with his assessments. But he is honest in and only > wants to help. I told[/color][/font][/size][/align][size=3][color=black][/color][/size]-l7E6m$Qiz
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]him to give the scope hell and really check it out closely. FYI, here is his report:[/color][/font][/size][/align][size=3][color=black][/color][/size](UC {B4O!vonL7[
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]-------------[/color][/font][/size][/align][size=3][color=black][/color][/size]
] VGe@'i+S#|v [size=3][color=black][/color][/size][align=left][font=Arial][color=black][b][size=12pt]TEC 140 APO TEST REPORT, BY M.T. (JAPAN)[/size][/b][size=12pt].[/size][/color][/font][/align][size=3][color=black][/color][/size]

N^F6^ ?o?%t:s-rw9O9Oi [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=purple]TUBE ASSEMBLY[/color][/font][/size][/align][size=3][color=black][/color][/size]w"ZG/rrM"nn:L:@N
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Lens coatings are hightly anti-reflective and of excellent quality. Lenses are not blackend[/color][/font][/size][/align][size=3][color=black][/color][/size]#~.aEKP{
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]on their edges.[/color][/font][/size][/align][size=3][color=black][/color][/size]
9sWw {6bF-t:^[ [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Dewcap is long enough to block stray light from entering but dewcap interior is anodized[/color][/font][/size][/align][size=3][color=black][/color][/size]F(h%pQ B
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]and reflects the light that enters into it. Light absorbing flock paper or felt applied[/color][/font][/size][/align][size=3][color=black][/color][/size]
/X[[[%TD [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]to the dewcap`s interior might help reduce these unwanted reflections.[/color][/font][/size][/align][size=3][color=black][/color][/size]R&{-F-e}2As
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]There are only 3 baffles inside the scope. TAK uses 5 baffles and my AstroPhysics SDF155[/color][/font][/size][/align][size=3][color=black][/color][/size]!ln!_8t/yd+N&H
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]has 16. The black painted tube interior is rather reflective of stray light and this bothers[/color][/font][/size][/align][size=3][color=black][/color][/size]
v"bt[!?%^[l K [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]me.[/color][/font][/size][/align][size=3][color=black][/color][/size]0O7Yg|o9r*z
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Focuser internal baffling is accomplished by use wavy edges located around the focuser[/color][/font][/size][/align][size=3][color=black][/color][/size]ShE?4C Z{e
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]interior. My AP as 13 of these wavy mini "baffles" and the TEC has 12. This number[/color][/font][/size][/align][size=3][color=black][/color][/size],fd%z
]5z})DI^:Y
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]is definately enough for the job and no problem there. However,the TEC`s focusers baffles[/color][/font][/size][/align][size=3][color=black][/color][/size]
g,o R {fu [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]reflect much more stray light than the baffles on my AP.[/color][/font][/size][/align][size=3][color=black][/color][/size]:q ?Khe} M
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Focuser is extremely robust and the feel of the micro focuser is quite excellent. However,[/color][/font][/size][/align][size=3][color=black][/color][/size],L%tRF+_7PZyi
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]making small adjustments with the microfocuser is hard to do with gloves on. Also, there[/color][/font][/size][/align][size=3][color=black][/color][/size]
+Y a d+mr9I:L [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]seems to be a backlash of about 1/2 a gear tooth when the knob is let go.[/color][/font][/size][/align][size=3][color=black][/color][/size]
Tq0ya4kC8? [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=purple]TESTING[/color][/font][/size][/align][size=3][color=black][/color][/size]w"]"H$y9E'o.~ASD
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]I tested the TEC 140 7 times, on 4/9, 4/10, 4/13, 4/15, 4/16, 4/17 and 4/21, for a total of 12[/color][/font][/size][/align][size=3][color=black][/color][/size]3^W ZQry\
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]hours of actual viewing time. Viewing times were generally from 7PM to about 10PM.[/color][/font][/size][/align][size=3][color=black][/color][/size]
6b~4a%rx;V8qs [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Outside temperatures dropped about 3~4 degrees from a starting temp of about 15[/color][/font][/size][/align][size=3][color=black][/color][/size]
bZ(m%~Iv [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]degress C down to about 11 degrees C. Interior temperatures were about 17~20 degrees[/color][/font][/size][/align][size=3][color=black][/color][/size]
R pKX8|tr+R3~.q dw [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]C at the time I took the scope outside for testing.[/color][/font][/size][/align][size=3][color=black][/color][/size]%fx$R~*gV
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]VIEWING LOCATION was in the outskirts of U. City, for the planets, moon and fixed stars.[/color][/font][/size][/align][size=3][color=black][/color][/size]&|)MW,[ k!W,z
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Other objects were observed on Mt.T. at a height of about 500 meters and at about 3[/color][/font][/size][/align][size=3][color=black][/color][/size]-@ Yo"pIM'H,v
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]degrees Celsius. I asked my buddy S-san to join me in order to get a more objective impression[/color][/font][/size][/align][size=3][color=black][/color][/size])e(K!|1RE^}A%uPq
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]of the scope. We used a 2" TV Everbright diagonal mirror.[/color][/font][/size][/align][size=3][color=black][/color][/size]
"S1T$L&x\PE3z [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black][color=purple]EYEPIECES[/color] used were the NAG 4.8mm, Nag 9mm, Pan Optic 22mm, Vixen AV 4mm,[/color][/font][/size][/align][size=3][color=black][/color][/size]3Z(N'ULg8^ VXp,?
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Pentax XL7mm, Meade SW6.7, Baader Eudiascopic 3.8mm / 5mm and 10mm, GOTO[/color][/font][/size][/align][size=3][color=black][/color][/size]
B @U;z$M7m.k _ [size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]Optical OR6mm, Kasai OR7mm and Nikon OR9mm.[/color][/font][/size][/align][size=3][color=black][/color][/size];r7x%IkR
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black][color=purple]BARLOWS[/color]: TV 2" 2X Big Barlow, Baader 2" Flourite Barlow, Intes 2.4X and Kokusai Kohki 3X[/color][/font][/size][/align][size=3][color=black][/color][/size] _1E)rV4k0c\
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]barlow. For direct comparisons, I used my AP SDF 155 telescope, applying a 140mm ID[/color][/font][/size][/align][size=3][color=black][/color][/size]rLRD.ca
[size=3][color=black][/color][/size][align=left][size=12pt][font=Arial][color=black]aperature mask.[/color][/font][/size][/align]
1v g |8Pi3O&M
b!?0b&yH&Z+Y"Q^~ [[i] 本帖最后由 siqingtan 于 2008-8-29 22:53 编辑 [/i]]

[align=left][font=AvantGarde-Book][size=6.5pt][font=Times New Roman][size=3][color=red]OBSERVING IMPRESSIONS:[/color][/size][/font][/size][/font]p&]RsqjW
[color=black][/color][/align][align=left][font=AvantGarde-Book][size=6.5pt][font=Times New Roman][size=3][color=purple]SATURN Observed outdoors for about 1.5 hours.[/color][/size][/font][/size][/font][/align][color=black][size=3]TEC
+sC+M QrRV Extremely sharp image. The entire Cassini ring was visible and equatorial regions both1T8V1^+yhf8L
faint and distinct were easily discernable. Background was a little bit bright, and seeing
ok7K(GE$g5DOg somewhat unsteady.-x6Ou.};jU%F
AP (at 140mm)
e"?oZ^3{7g Could NOT see the entire Cassini ring. Equatorial regions both faint and distinct somewhatHUA!@C3|9ng w_8Z
visible. Background was distinctly darker than the TEC. Background was dark, seeing"B&O4tJ0s~mazv
very unsteady.
z0hBwr AP (155mm) without aperature stop:Gq,\ pNR!I
Equatorial regions somewhat faint but color / grey scale rendition very good, while contrast
h}"cN(z]/m6o$L.| was somehwat lowE.iW5w|#zE-f
[color=purple]JUPITER Observed outside for about 2 hours[/color]^b"k2C8g3j!L9MD
TEC$~3C6[ hq]N@m2UG
Jupiter`s edge very distinct. The two main belts are very clear and almost leap out atE/\%znNQ.Ar.b$m
you. Image overall is very white. Jupiter is extremely white overall. Tiny belts were certainly
vGa9JcjK;V visible but the overall planet appeared somehwat mushy, with a lack of 3D feeling.c9C:H @Hp
Seeing on the steady side.3w o(g5WF:x
AP (stopped down to 140mm aperature)
0R.oy6v On Image is somewhat soft. Contrast not so high but color rendition very good. Image isjDa6f7^"?"B"O
somewhat darker than TEC and image looks somewhat yellowish. Seeing very unstable.
QK5pDv
g PK AP without aperature stop: Image is brighter than TEC but color/grey5f a!F3e1M7r7]"K)x6F+[
scale rendition was about the same. NTB/ NNTB/STB`s very faint areas are easily visible.@BO6lU&\-r1w
Could not see these areas as easy on the TEC?L{4f.m3O6B#\M
[/size][/color][font=AvantGarde-Book][size=6.5pt][size=3][color=black][color=purple]MOON[/color],Q [,I-u7K
TEC
g#t@ nUQ$v Extremely white image. Crater walls are so sharp they almost hurt my eyes. Seeing
h h.v'WH*Z%i'zi steady.)t;F/~l'Ku|N;KP
AP without aperature mask{iE6q2h.h*^m
Somewhat yellowish. Image is sharp but the unsteady seeiing botherd my eyes.
-pU4b jS'G3R [color=purple]FIXED STARS: Castor, Pollux, Algieba, arcturus, Mizar, etc[/color]J
c"Aswm
TEC
uA.NLc Background is whitish. Airy disk is extremely small. Though still visible and perfectly round,,Y'_/J&Z~^w]+dY
the scopes needs to be cooled down thoroughly first in order to see the entire ring. Also,
}A ~ V/Ae&s m9N while the scope was cooling down, I witnessed that the Airy disk would change shape JS ^4z~rbc$V
slightly until becoming a perfect circle. TAK FCT 100 would also exhibit the same behavior.
[1T9DvYw*F2dP} My AP did not show this behavior.
C,o3R{2SB Second outer diffraction ring would form a delicate circle. For 1st mag or brighter stars,
{A"TgL2?b b a tiny bit of red color was visible.;w&M e0?@2c6d$~y9dp
AP
/}fQ;Af:pLf Image was not quite settled until after a 3 hour cool down but the Airy disc was perfect X DNM'w;H+s^0_
and the secondary diffraction ring was beautifully visible. For 1st mag or brighter stars, aR8w:I{#G2MgDIF
tiny bit of yellow color was visible.1oczB[!m@'W(f$Eja
[color=purple]OBJECTS M4, M44 ETC.Sr g'^sUCx
[/color]TEC?8]j8a*AQJ4E
Stars were pin piont. Seeing good. Background was whitish and stars did not stand out$\:@9I|)U
quite as much as I would like.
0o#XbmRS[ AP
|+V9JT)DG8b Seeing conditions were variable but stars are brilliant pin points. Background is very dark
]X1W}:N O and image is very transparent.A^ r${&E,PL4J
[color=purple]IMAGE IN AND OUT OF FOCUS[/color]
0Q7V uZ
YZuq TEC
;gQKbd.a A virtually perfect textbook image both in and out of focus. This is my first time to experience0g3cw#sm:f:_gs
such perfection in this regard. My subjective evaluation put the optics at 1/8 to
8aTn ~Y cB[ 1/16th wave but I have no way to actually test this.3DM8Ti+]4q%e
AP
^1[h'~v"] Images in and out of focus loose contrast slightly. Maybe 1/8W quality??
H1h:?0N.if ~]| [color=purple]RONKI TEST[/color]X}
N'GC&G
I used a 200 line [per ??] Ronki test film I got from Tenmon Guide magazine
/JvI"e8_*t TEC3AZ,j!QOc@'QT$~
Almost perfectly straight but line cirvature at field edge seems to indicate a slight overcorrection./Oj3}R8|u$@^
AP\ S)l&u8a a4[
Lines similar to the TEC but line curvature at field edges is even more pronounced.[/color][/size][/size][/font]
ctWLO5Mt_0~/S ?(TGy$CU
[[i] 本帖最后由 siqingtan 于 2008-8-28 17:54 编辑 [/i]]

[size=3][color=black][color=red]MY TEC140 IMPRESSIONS[/color]
u}6o:XC4BQv Chromatic aberration, and speherical aberation level is probably the bestL`^1R
gw
I have ever seen and very good.
sL%dF.P}Y Images are plenty bright.If my AP stopped down to 140mm aperature reperesents "100",
8{O @@;Lcl the TEC would be about a "130", with the AP at full aperature being about a "150" in
!V%t
Clx comparison. Also, the lens is extremely color free and images are very clear and distinct.,`9@3`(]~]
The TEC cools down relativly quickly in the field. The AP`s fatter tube and the many baffles
-qvglk3~ (16 in all) might look good in the showroom but too many baffles might impede the
9vWkY:|D{~ flow of air, this possibly causing an increase in my AP`s cool down times.y K2X*l e&f
S0O(X kBa
However, no matter what object was observed, the TEC had a noticelably brighter and
E@)~+OVb#ct whiter background than the AP. I feel there is room for improvement in the interior paint0R~$`.D0\F7A
job of the TEC 140.e5mKO bVR!mv
A scope`s performance relies on more than just the lens. Lack of contrast hurts detail in

\7[.f(|e)d8Qkl planetary images and also inversely affects deep space objects.
h6Z2d"H.~\2H(hW I feel an improvement in contrast is imperative but just adding more baffles is perhaps
_\e jBl0K$D not the answer. It is best to perform a more balanced improvement that perhaps adds
gB4L rd6| some baffles and also paints those baffles with decidedly more light absorbing paint. Or;wt+]:[;H
how about applying some highly light absorning black flocking paper? Edge blackening`L5U9a3EQ7i2D$x,j
the lenses might also be a good idea.
[L X!fp,b vH The merits of a 14cm refractor include: excellent compactness, higher contrast, exceptional2k_P-C`!c/cn\
resolution, adequate light gathering power and quick temperature acclimitizationA,]0B#C
m _-D'i$Xg
for maximum viewing efficiency. By fully utilizing all these qualities, we can look forwardE!_FB8k@9K
to the ultimate observing tool.[/color][/size]

结论是什么呢?有中文的解释一下吗?

TEC也单卖镜头？

请教一个问题，为什么back focus是图里的那一段从调焦座后到一个平行的平面，而不是到物镜的焦点处？

因为那段虚线就不是焦点吧

TEC 140有人说非常好，有人说有些色差，而且色差比TMB130F6要“大两倍”，不知道大两倍是什么概念？这种有争议的镜子，真是要自己看看才知道是否符合自己口味:)

[quote]原帖由 [i]tigerr[/i] 于 2008-8-28 20:18 发表 [url=http://www.astroview.com.cn/redirect.php?goto=findpost&pid=68856&ptid=6894][img]http://www.astroview.com.cn/images/common/back.gif[/img][/url]
:\j4p0^weo8pP/Q 请教一个问题，为什么back focus是图里的那一段从调焦座后到一个平行的平面，而不是到物镜的焦点处？ [/quote](S-M&D7Ux4H
那个平面就是焦点像平面，这个图画的是正确的，通常我们观测时都有一个像面尺寸，他用虚线画出这个调焦座到焦点能有多大尺寸的像面。

不错 看过了 留名下 :loveliness: