Showing posts with label 5D. Show all posts
Showing posts with label 5D. Show all posts

Canon EOS 5D Mark II Hands-on Preview


Preview based on a pre-production EOS 5D Mark II

Back in August 2005 Canon 'defined a new DSLR category' (their words) with the EOS 5D. Unlike any previous 'full frame' sensor camera, the 5D was the first with a compact body (i.e. not having an integral vertical grip) and has since then proved to be very popular, perhaps because if you wanted a full frame DSLR to use with your Canon lenses and you didn't want the chunky EOS-1D style body then the EOS 5D has been your only choice. Three years on and two competitors have turned up in the shape of the Nikon D700 and Sony DSLR-A900, and Canon clearly believes it's time for a refresh.

So here is the 5D Mark II, which punches high in terms of both resolution and features, headlining: 21 megapixels, 1080p video, 3.0" VGA LCD, Live view, higher capacity battery. In other words, a camera that aims to leapfrog both its direct rivals, either in terms of resolution (in the case of the D700) or features (in the case of the DSLR-A900). Full detail below.

Key features / improvements

  • 21 megapixel CMOS sensor (very similar to the sensor in the EOS-1Ds Mark III)
  • Sensor dust reduction by vibration of filter
  • ISO 100 - 6400 calibrated range, ISO 50 - 25600 expansion (1Ds Mark III & 5D max ISO 3200)
  • Auto ISO (100 - 3200) in all modes except manual
  • 3.9 frames per second continuous shooting
  • DIGIC 4 processor, new menus / interface as per the EOS 50D
  • Image processing features:
    • Highlight tone priority
    • Auto lighting optimizer (4 levels)
    • High ISO noise reduction (4 levels)
    • Lens peripheral illumination correction (vignetting correction)
  • RAW and SRAW1 (10 MP) / SRAW2 (5 MP)
  • RAW / JPEG selection made separately
  • Permanent display of ISO on both top plate and viewfinder displays
  • AF microadjustment (up to 20 lenses individually)
  • Three custom modes on command dial, Creative Auto mode
  • Image copyright metadata support
  • 98% coverage viewfinder (0.71x magnification)
  • 3.0" 920,000 dot LCD monitor with 'Clear View' cover / coatings, 170° viewing angle
  • Automatic LCD brightness adjustment (ambient light sensor)
  • Live view with three mode auto-focus (including face detection)
  • No mirror-flip for exposures in Live View if contrast detect AF selected
  • Movie recording in live view (1080p H.264 up to 12 minutes, VGA H.264 up to 24 mins per clip)
  • Two mode silent shooting (in live view)
  • New jump options in play mode
  • HDMI and standard composite (AV) video out
  • Full audio support: built-in mic and speaker, mic-in socket, audio-out over AV (although not HDMI)
  • IrPort (supports IR remote shutter release using optional RC1 / RC5 controllers)
  • UDMA CompactFlash support
  • New 1800 mAh battery with improved battery information / logging
  • New optional WFT-E4 WiFi / LAN / USB vertical grip
  • Water resistance: 10 mm rain in 3 minutes

Canon EOS 5D Mark II: 21MP and HD movies

Amstelveen, The Netherlands, 17 September 2008: Canon announces the full frame, 21.1 Megapixel EOS 5D Mark II: the first EOS with full High Definition video capability.

Compact, lightweight with environmental protection, EOS 5D successor boasts a newly designed Canon CMOS sensor, with ISO sensitivity up to 25,600 for shooting in near dark conditions. The new DIGIC 4 processor combines with the improved CMOS sensor to deliver medium format territory image quality at 3.9 frames per second, for up to 310 frames.

Triggered from Live View Mode, HD video capture allows users to shoot uninterrupted at full 1080 resolution at 30fps – for amazing quality footage with outstanding levels of detail and realism.

The integration of HD movie capability into a high-end 21.1 Megapixel camera opens a multitude of new possibilities for photojournalists and news photographers. With its full frame CMOS sensor and outstanding ISO performance, the EOS 5D Mark II will appeal to any photographer in search of the finest camera equipment available – from studio and wedding to nature and travel photographers.
Other improvements to the EOS 5D include

  • Addition of Canon’s EOS Integrated Cleaning System, with a new Fluorine coating on the low-pass filter
  • Larger 3.0” Clear View LCD with VGA resolution, a 170° angle of view and anti-reflective coatings
  • Improved menu system including Quick Control Screen for more direct access to common settings
  • Automatic peripheral illumination correction, utilising detailed EF lens information to optimise JPEG images straight out of the camera
  • Magnesium alloy construction with additional environmental protection
  • UDMA memory card compatibility.

“Professional photojournalists and wedding photographers already choose the EOS 5D for its discrete size and outstanding image quality,” said Mogens Jensen, head of Canon Consumer Imaging. “The addition of HD movie recording opens a new chapter for EOS. It creates new possibilities for EOS photographers to capture and share their stories and to stay relevant in a rapidly changing digital landscape.”

Key Specifications:

  • New 21.1 Megapixel CMOS sensor with improved EOS Integrated Cleaning System (E.I.C.S.)
  • New Full HD 1080 resolution movie recording
  • 3.9 frames per second continuous shooting
  • High performance DIGIC 4 providing superb image quality
  • Maximum 310 large JPEG images in a single burst with a UDMA card
  • 3.0” VGA (920k dots) Clear View LCD
  • ISO 100-6400 (expansion from 50 up to 25,600)
  • 9 AF points + 6 Assist AF points

Additional information

New CMOS sensor
The EOS 5D Mark II’s newly designed full frame 21.1 Megapixel CMOS sensor features ISO sensitivity from 100-6400, expandable to 50, 12,800 and 25,600. Large 6.4µm2 pixels have been redesigned to capture more light and yield a better signal to noise ratio to ensure lower noise images throughout the ISO range. The full frame sensor has the same dimensions as a frame of 35mm film. This means that wide-angle lenses stay wide, without the change in angle of view associated with smaller sensor cameras. As well as benefiting from finer control over depth of field, photographers moving up to the EOS 5D Mark II’s full frame format will find the newly designed wide, bright 98% coverage viewfinder on a joy to work with.

New DIGIC 4 processor
A new DIGIC 4 processor combined with 14-bit analogue to digital conversion provides smooth gradations in mono-tonal areas such as skies, and highly accurate colour rendition. As well as HD movie shooting, DIGIC 4’s high speed provides for long uninterrupted continuous bursts of large JPEGs, near-instant start-up times and immediate and fast review after shooting. DIGIC 4 also provides for improved noise reduction algorithms, complementing the already low noise images from the EOS 5D Mark II’s CMOS sensor.

HD video capture
The EOS 5D Mark II is Canon’s first D-SLR to incorporate full HD 1920x1080 video capture. Once filming is started from Live View mode, photographers can fire off either single of continuous stills, with video capture continuing after the final frame is captured.

See everything
A new 3.0” VGA resolution LCD provides a wide 170º angle-of-view, providing plenty of clarity for accurate focus checks in playback. The screen brightness can automatically adjust to suit viewing conditions, extending battery life in low light and improving viewing in bright conditions. A new dedicated Live View button switches modes to display a real-time image on the LCD. This allows EOS 5D Mark II photographers to enjoy simplified shooting from awkward angles. Simple connection to a PC provides easy remote shooting.

Precision focus and metering

A 9-point auto focus system is supported by 6 additional invisible Assist AF points, located inside the spot-metering circle to optimise subject tracking performance in AI SERVO AF mode. For accurate exposure readings in tricky lighting conditions, the spot metering circle covers just 3.5% of the frame.

Control

The EOS 5D Mark II’s redesigned menu system includes a new Quick Control screen, for instant access to the most commonly changed settings. A new Creative Auto mode allows photographers to cede control of key settings to the camera, while retaining control over creative variables such background blur, drive mode and image brightness. Custom user settings allow photographers to switch between two completely different camera setups. This is ideal for changing quickly between two different environments, such as switching from working inside a church without flash to outdoors with fill-flash at a wedding.

Accessories

Shooting flexibility is enhanced with a range of new accessories. Shooting capacity can be extended with either the high capacity 1800mAh lithium-ion Battery Pack LP-E6, or Battery Grip BG-E6.

A new optional Wireless File Transmitter –

the WFT-E4 – offers external HDD and GPS compatibility along with ability to transmit images direct to computer or FTP server, or operate the camera wirelessly. Both the BG-E6 and WFT-E4 feature a vertical orientation shutter release and other key controls for comfortable portraiture work, with a substantial grip to help balance the camera when used with long lenses.

Technologies Explained:

CMOS
Canon’s CMOS technology is one of the company’s key competitive advantages, with noise reduction circuitry at each pixel site delivering virtually noise-free images. In comparison with CCD technology, the lower power consumption characteristics of Canon’s CMOS sensors also contribute to longer battery life.

Signal conversion in Canon’s CMOS sensors is handled by individual amplifiers at each pixel site. Unnecessary charge transfer operations are avoided, vastly speeding up the process of getting signal to the image processor. Noise generation is reduced, power consumption is limited and faster frame rate potential is increased.

DIGIC
Image data captured by the CMOS sensor is processed by Canon’s purpose-built DIGIC image processors before being written to the camera's memory card. DIGIC technology uses advanced image processing algorithms to ensure precise, natural colours, accurate white balance, and advanced noise reduction. Ultra-fast processing speeds result in highly responsive camera operation and near-instant start-up times.

DIGIC chips work with a high speed DDR-SDRAM image buffer – reading, processing, compressing and writing image data fast enough to keep the buffer clear during long continuous shooting bursts. And because DIGIC integrates all key processing functions, power consumption is kept to a minimum.

EOS Integrated Cleaning System
The EOS Integrated Cleaning System combats sensor dust in three important ways: Reduce, Repel and Remove.

  • Reduce - Internal camera mechanisms are designed to minimise dust generation. The redesigned body cap prevents dust generation through wear on the cap itself.
  • Repel - Anti-static technologies, including a special fluorine coating, are applied to the low-pass filter covering the front of the sensor so as not to attract dust.
  • Remove - A Self-Cleaning Sensor Unit uses hi-frequency vibrations to shake dust from the infrared filter for a period of approximately one second after each start up. For instant shooting after power up, this feature is disabled immediately the shutter release is depressed.

Canon has also developed an internal Dust Delete Data system, which can map the position of visible dust on the sensor. This can then be deleted automatically after the shoot with the latest Digital Photo Professional software.

Picture Style
Picture Style pre-sets simplify in-camera control over image qualities. Picture Style pre-sets can be likened to different film types – each one offering a different colour response. Within each selectable pre-set, photographers have control over sharpness, contrast, colour tone and saturation. The camera’s factory default configuration is set to deliver immediately-usable JPEG images without need for additional menu settings. Picture Style presets applied to a RAW image can be revised with Canon’s Digital Photo Professional software.

The six pre-sets are:

  • Standard – for crisp, vivid images that don’t require post-processing
  • Portrait – optimises colour tone and saturation and weakens sharpening to achieve attractive skin tones
  • Landscape – for punchier greens and blues with stronger sharpening to give a crisp edge to mountain, tree and building outlines
  • Neutral – ideal for post-processing
  • Faithful – adjusts colour to match the subject colour when shot under a colour temperature of 5200K
  • Monochrome – for black and white shooting with a range of filter effects (yellow, orange, red and green) and toning effects (sepia, blue, purple and green).

Software
Digital Photo Professional Software
Digital Photo Professional software provides high speed, high quality processing of lossless RAW images. Processing with Digital Photo Professional allows real-time display and immediate application of image adjustments, giving control over RAW image variables such as white balance, dynamic range, exposure compensation, noise reduction and colour tone – plus the ability to view Auto Focus points on an image. The Lens Aberration correction tool allows precise correction of different types of distortion caused by certain cameras. Images can be recorded in camera with sRGB or Adobe RGB colour space.

Digital Photo Professional supports sRGB, Adobe RGB, ColorMatch RGB, Apple RGB and Wide Gamut RGB colour spaces. ICC (International Colour Consortium) profiles can be attached to TIFF or JPEG images when converted from RAW. This allows faithful reproduction of colours in software applications that support ICC profiles, such as Adobe Photoshop. For improved efficiency, a set of image adjustments can be saved as a recipe and applied.

EOS Utility
The latest version of EOS Utility provides essential support for Live View remote shooting, camera configuration and image transfers. Tightly integrated with Digital Photo Professional, EOS Utility can be configured to monitor ‘hot’ folders, automatically renaming and moving incoming images to a structured file system. Users can also tag their images with EXIF data, including copyright information.

Picture Style Editor
Picture Style Editor allows users to create individual Picture Styles that fit with their personal requirements. Each Picture Style contains detailed information on how specific colours should be represented within an image. Once new Picture Styles have been created, they can be uploaded directly into the camera and applied to JPEG or RAW images. When working with RAW files in DPP, both personal Picture Styles and the 6 predetermined Picture Styles can all be adjusted.

Additional images

5D DIY 提升對焦精準度方法 (密技) (from web)

我的5D對焦精準度越來越差了....$ T5 ?0 z m! S( W% o, D8 M5 ]

4 L7 Z# R. E0 h% H6 z話說從前.. a$ D* X* x4 w- m4 k

5 l: Y, K- {3 D# z4 ~# g3 g剛買5D時...蠻準的( M0 F9 b. x5 |% j) ], d4 V
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狂操了3個月後....怪事出現了...
' h! r8 |# u" u# T9 c/ j2 g8 D9 D% M6 {, J* A6 V0 @
裝上小白IS... 中央點對焦變不準了...奇怪的是..越靠右邊的對焦點越準????
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4 x' M$ h" c3 a( P* f0 N但是裝上 85 1.2L... 每個對焦點都很準??
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, r, [( r4 f$ w! r2 K4 u5 A7 Y2 m" k' |
最近....又狂操了一年多.... 奇怪- d: T& D% I& t* p. C% s( r
6 |* O- U1 L; P
小白IS...中央點更不準... 原先很準的... 右側對焦點也不是很準了
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! |1 ~5 c6 U t. i連85 1.2L 也不準了: D/ L( L! o$ @
# M, z) }. U* e2 w( ~4 `. a
兩顆鏡頭都變成輕微的後移
4 _5 k+ }% d8 r2 A- N, y3 f6 \0 s$ t) L! I
今天....陪Rich 去買 小白IS
G/ P4 ~: P" t# {: Y$ g. p h1 w% [+ `. i
他的全新5D + 挑選過很準的小白IS.... 光圈全開時... 非常準...
p) u M" l+ n% z# o7 |# V
2 L t ^/ B; A7 r心理實在很不平衡
8 k! `9 C" w( v7 c4 J$ P
4 b5 D6 u$ V! z J5 n9 K難道是我的小白IS 與 85 1.2L 老化了嗎?? r" d: A$ S3 T7 d- l! G2 \
& b k. d S, j5 _9 A( i
這兩支鏡頭裝在大兔上.....測試一下... 依然是很準..而且還很銳利
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" |4 }2 b1 z) A: V奇怪..裝在5D上...怎麼變不準 g9 T6 j5 [' Q- O4 D& s8 ?- }
7 h% ]& G) n: c5 {
我決定...打算送日本調機身......7 @$ K( z$ W( c8 a: I
$ y9 X3 a( }. N8 E: g. G" |. ]" d, Q
但是....來回又要花很多時間....
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實在很不爽..... 乾脆自己研究看看...搞不好可以找出問題點來0 h9 H6 \' i5 u9 S

3 O- c" [6 D- w/ T! G% V8 F第一個懷疑的地方是# I- }/ d! z1 g9 U

( K0 u; Y! ~; J我的反光鏡片掉下來了... 自己用雙面膠帶黏回去
/ S. C1 |& e$ u8 }9 ?) s6 V會不會是黏回去的厚度與原廠不一樣..導致對焦不準) l% A2 @' H$ Q
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仔細想想...應該不是...因為反光鏡還沒掉下來之前...就開始變不準了, _3 [/ {, X. F, r
+ ~7 d: O8 k, S$ n- h/ T4 N- ]! f
做個實驗... 把反光鏡拆下來..多黏幾層雙面膠帶...變厚一點..看看是否會影響對焦準確度, l& K5 o) Q% ^- r( r
) G1 ] h! k- ^* B# W
答案是....不會改變對焦精準度...6 o7 r: q* L l/ g

. O2 p \( E D, L2 R. }但是會導致..正確合焦後...從觀景窗看對焦處確變的更模糊; r4 F u- ~# ~9 U0 ~3 R
實際拍出來又沒那麼模糊0 p/ A! q; C4 F$ m
, \6 d, c9 [: \( {
排除反光鏡黏上去的厚度問題... 重新黏回反光鏡... 只要貼一層雙面膠帶即可( w( t' `. I. ^; j$ x/ e( G
不能貼太多層 k6 ~& D: L3 C- z) c- D. n
# }- u1 P* f: u! K1 O: C
接下來....思考..在思考...$ [7 X' w% l. r6 |% _6 V

5 @, f Y3 z, E+ T自動對焦原理是..... 部分的影像..穿透反光鏡中央部位4 ] ?3 j) U! I5 g# B7 u+ s
由反光鏡後方的一片45度小玻璃...將影像投射到下方的對焦感應器內...
- E. A) T+ D3 y" i3 g( B! ?- J8 K" I6 D) H3 D+ J
之前好像看過有一篇D70調整反光鏡後方小玻璃角度的DIY教學
0 m0 u( d% [! k0 h9 j0 O. O0 s% Q. R' {5 l. z& }4 D
http://www.leongoodman.com/d70focus.html
2 O+ n7 k; V8 w/ p% c5 [$ u
# c( w; z [) O原理是...調整裡面那顆螺絲# v" V3 }0 M& C+ G) D B, V1 x
因為那顆螺絲..屬於偏心螺絲. Z. F# }7 y( `& b( }& r# i
轉動時..會改變螺絲的位置
. |4 w. B% Z% p! m7 ?0 ?6 A4 E2 D- X* f& F" k1 O. G
這顆螺絲負責頂住反射小玻璃9 e' W" r5 }# r9 T1 S

" V; k2 S: c9 a3 Q3 B+ Q轉動螺絲..可以改變
% d: m1 J" I9 C- M- t/ Q+ |2 |0 A" o5 A. \
反光鏡落下時
$ T* X6 d% {/ X" }& P1 E0 B. E0 e# V- Q P1 h4 b
後方反射影像的小玻璃的高度與角度
7 Q* j; j& `% Z9 k! I6 T( \' K5 u& M2 `/ G
藉由調整小玻璃高度與角度...來修正小玻璃所反射到影像到AF感應器的距離與長度2 y8 R% d; o. ?5 L

, ~0 t0 y# E5 p3 }9 l# B- }微調對焦精準度
) P7 s+ Y; w3 k; [2 q/ C) F. b1 {& ~7 d; E
仔細觀看5D整組反光鏡支架與後方反射小玻璃...整組都是用塑膠做的% J1 k1 K# G" x" t' O
4 S% [6 ?0 a+ ]- M# l
用手輕輕碰碰看... 還會晃來晃去...
) F1 y& [" ^( L# ^8 O3 z3 D" p% I2 b* y% k$ _6 Q& Y
大膽推論... 因為塑膠材質...加上我拍攝張數很多...長期使用下..已嚴重磨損8 c* V, E+ o/ G# o" k5 ^* [( ~6 M
0 v+ V& h. h n, }" W6 N
導致後方反射的小玻璃...落下的位置已經偏移了..導致對焦精準度越來越慘4 Q+ ]( }; \. Z% N2 N1 l

3 _& O- S& m/ Q7 i! |至於大兔...整組反光鏡組都是金屬材質...長期使用下6 R/ Y& `3 n0 |: @
反光鏡組的耐用度與精準度都可以保持在一定的水準' b3 K5 {! m2 \; Z! n' Y$ N
/ C- ]/ w9 I# S. D0 p( H' [
那....就來看看5D的構造' {$ q: Z" r- K9 S7 ]. \# e4 W! h$ x

q# j8 ]4 Z g4 @( r' r+ I 先看看我可憐的5D...反光鏡片掉下來.是用雙面膠帶黏回去的1 @ i/ R* B# N8 b" S9 f9 o

+ U; h: j/ q3 t) J$ {' y) U% ~' b0 b; J

- }! P2 r9 v: m; |1 c+ q) o" I5 U8 j
" q% M# k: Y/ M, d, C, B將整組反光鏡往上掀.....6 J9 n9 R1 z/ o: v

6 C* M9 R6 ~* ^1 I2 t. n4 N看到有一前一後..兩組螺絲...左右對稱0 M2 `7 P8 N1 F9 { J% J1 O& ]2 i
- |+ V& v( ]. r0 \& \# o
. G+ `2 U; s' f8 U& g
9 m1 a+ l9 Y$ \. b9 o/ N; D: W
前面那顆螺絲....負責頂住反光鏡落下的高度...屬於可微調的偏心螺絲
& Z6 p1 ]- I7 ?, N- A5 `
% B0 \8 j6 l2 f9 i後面 (裡面)那顆螺絲....負責頂住反光鏡後方反射小玻璃落下的高度與角度...也屬於可微調的偏心螺絲
" e% e- k/ L; r z
|3 m) `, x5 F9 {/ F/ Z0 ] 沒錯...就是要調裡面那顆...
# P ?( u& w, b$ T* L5 R& P w P( }: J/ m
問題來了.....0 P' `+ ]$ [; y. s. S3 b' }2 `
( i" T" F7 d9 W n, P% Z
去哪找特殊的板手調整...??
; K2 |7 x1 F4 q U/ \8 A8 Q3 P, lCanon的偏心螺絲好像比Nikon還小顆... 用一般的六角板手似乎也插不進去! C9 T2 i! ?( x
* ?- |6 T% [- Z O% h$ B
而且這兩顆螺絲左右對稱...兩邊一定要微調一樣的角度才能保持反射小玻璃的高度水平一致& h* {. N% D6 A) S
' C& J5 |" n i( W! g; L! S4 ^
如果...調錯了...我又如何回歸成原來的設定呢??
) L% A3 g* Q# I% o+ G
: E- `: n4 p2 j/ w# x* _以上種種問題...讓我陷入困境- v# ]/ q" m1 M9 i/ m8 _1 \

: h0 @# J6 D+ b- o* ?原本要放棄了....
) G2 Z0 @& e. n. n
# h" @9 G ^7 M4 |3 a抽了3支煙並且苦思解決之道* a2 k$ S9 \# b

' l$ q2 p) \+ z& v1 g" [. o9 |1 X突然....靈機一動.... 有新點子了..
6 b4 V) V9 j9 b
9 Z, u8 @; t V( }/ J正門不行...改走後門7 o8 V2 g7 }' H) \6 H3 O7 o# a
7 p( y) v; v7 h+ e) @8 v
將反光鏡掀開....! o& u: Z3 d: y; A5 n; X3 J
: b, @7 |6 N! ?4 l8 c
可以看到後方小反射玻璃收起時.... 兩側有兩個小痕跡
' j; H6 N4 k' T6 K
% ^% n6 ~% [! p- ^) p+ r% e; I0 @; ?( }" s7 K

! O6 }. e6 N1 h0 @9 J* O# h9 E% J這兩點....就是反光鏡落下時... 後方反射小玻璃頂住固定微調螺絲的地方, f2 a) O9 k7 J+ v9 A) w

6 X7 m0 m# E, ^9 r2 x4 H既然無法調整螺絲.... 乾脆從這邊下手) D) `$ ]2 r: Q/ G* _) |4 z

! @" V; E T* T3 T: g, A用之前買的 日本專用機身保護貼膠帶.... 剪下兩小塊
: U) {: A! o' J( p! B% y; a0 t
- H* [5 ~6 [& e( z5 A貼在這兩點上面....* P7 {* n8 Q- q9 G/ D' q3 ~
' s- s; j% O5 Q3 |+ B5 c* D/ o) ~% T
用捏子...輕輕的用力將膠帶往內頂...已確定黏的很緊
; b9 U6 n1 ]( V8 ]1 `9 g( ^怕會掉下來..傷到快門簾
' h/ d+ |4 i' a( _- {$ ~: C" N8 n
膠帶貼上去後.... 當反光鏡落下時$ s K1 i3 f* l( Z
後方小玻璃..停留的位置...就會被墊高..
* u; p. l/ n: Q! C q @藉此改變小玻璃的角度7 ^ O1 `# G. {( c1 w

0 m) s1 p* h; s# v s應該是與調整偏心螺絲有異曲同工之妙
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1 _5 Z5 p5 B' [4 m* C好處是...要恢復時..只要將膠帶拿掉即可... 完全不破壞機身
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! c) Y) I3 T% X& x( i黏好後的樣子
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$ L$ G+ E/ e) F裝上鏡頭...試試看7 A- M5 P* F6 A2 Q3 v
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哇哈哈.....變的有夠準...比我5D機身剛買回來時還準....
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% k$ J s7 ^) j% B5 V太爽啦... 叫我第一名
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先看看原本沒貼膠帶所拍的照片
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5D + 小白 IS 200mm端.... 2.8光圈全開$ t: y9 p7 [6 F2 h1 N u% q
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原圖縮圖$ H8 R* @% R( j' w% T% V

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對焦處裁切.... 有夠糊....實在無臉面對江東父老
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8 j8 Q9 i5 a' W一定很難想像....貼上薄薄的兩片小膠帶! U. P7 W; a4 j2 F. w
會改變多少 " t0 [$ L9 s, @ g3 ^7 l
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請看
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哇哈哈...... 差很多吧
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我試著貼兩層膠帶....5 D) n0 I3 P" u" V" m

6 ?, }" w, k: s. C6 i, o" r) M( q發現...會變成中央準
4 w S& |# K" O9 K7 v上面對焦點不準( C; v9 M# a3 Z! M
下面對焦點準
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在改回只貼一層..... 9個對焦點變的超準
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# p8 W% t j. Q3 F) i7 I再試試 85 1.2L... 也很準了
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* l( Q/ }4 b. B- d: o8 @3 w終於5D 恢復原本的水準.... 也可拍出與大兔一樣準的照片了
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我的發現是; z$ G' X" B; G# R7 Q

9 Q% {" A8 M1 a. h4 C; @+ G5D 用料實在有夠兩光3 t$ n* k% D' f
壓克力反光鏡片..長期使用...可能會投奔自由....飛出來 & G& ] U2 w; n- `! ~3 ?
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反光鏡組與後方的自動對焦反射鏡片...塑膠材質
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, @. R* v+ a3 b' v# y長期使用後...會磨損..導致位置偏移...對焦精準度下降 (焦點後移)3 o$ i, l. e$ Z1 j3 R
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沒關係....上有政策...下有對策+ Z( }* h" ~: t4 O/ Z
兩個問題通通用膠帶搞定* r7 S" g% V& |' d: W

$ j% o4 O; O5 E3 w我的5D...裡裡外外充滿了膠帶 8 L: L& C) H3 F$ v8 O; F
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5D我操的很兇..所以提早老化...才會面臨這些怪問題
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我想日後應該也有人陸陸續續會遇到吧:@ . t6 u. D9 k- N# e. @8 v

7 ?1 \" p. Y, N. [( t* q也許此方法也可以調整其他機身吧???; K, x" ^# x: u2 |- f# ]

6 f6 l8 ?6 \3 u不過前題是... 鏡頭必須很準...確定是機身的問題..用此方法才會有效
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日本機身保護黑膠帶其實很薄$ t- d, Z( s( Y& g- t' M: E3 ]

" D- P) J, e5 M4 S% C4 K! y薄薄的一層膠帶...就可改變那麼多的對焦精準度
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從這點可推論... 5D 經過長期使用... 塑膠反光鏡組的確會磨損...導致對焦越來越不準...(後移) $ p0 g8 A, n4 A( P, I% m& v% @/ ^
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研究了一個晚上....終於可以安心的去睡覺了 + f' q; d w2 A1 x
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我的5D只要兩塊小小的膠帶.... 又變成一尾活龍
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5D ................8萬6 H! `$ A* W5 q/ s

. T6 ~+ z) t" r! v) b- t小白IS............6萬
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85 1.2L .........5萬
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M- k* Y7 J! Y. Z/ l; L9 e- l8 k6 u 雙面膠帶........10元# `9 I5 I& c, Q
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日本機身保護膠帶......8百
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& x3 |5 _$ ^+ z, x8 c創意............................................. 無價