Значит то так....
Сказать вообщем то нечего, только предполагать можно....
Но сначала хочу дать предупреждение
SVKan за излишне-не правильный подход и грубость по отношению к
Djak.Устно естественно
Прежде чем делать какие-либо утверждения, надо обладать некоторыми знаниями.
А именно - ЭКЗИФ(по Русски)
Меня заинтересовало именно то, что я имею желание приобрести нужную мне оптику от Sigma в плане теле...... Имею 150-500 и скажу что, конкретно, я сталкивался с именно такой проблеммой, как нестабильностью в резкости:(
Получается, ну не точто бы через раз, но все же имею РЕАЛЬНЫЕ ошибки в этом аспекте, хотя к примеру, следующий кадр имеет достаточно резкую картинку
, :(, ?!
Я имел себе трудность перенести себе данные примеры посмотреть Экзиф и у них...
Вот они:
Значит так, по первому снимку экзиф показывает:
YResolution: 72,00
Resolution Unit: Inch
Software: ACD Systems Digital Imaging
Date Time: 2009:07:15 09:58:44
YCb Cr Positioning: Centered
Exif Offset: 227
Exposure Time: 1/100 sec
FNumber: F11,0
Exposure Program: Manual
ISOSpeed Ratings: 100
Exif Version: "0221"
Date Time Original: 2009:07:14 23:29:13
Date Time Digitized: 2009:07:14 23:29:13
Components Configuration: YCbCr
Shutter Speed Value: 0,0100 sec (1/100)
Aperture Value: F6,9
Exposure Bias Value: 0 EV
Metering Mode: MultiSegment
Flash: On, forced
Focal Length: 70,00 mm
Maker Note: "."
User Comment: Not possible to define
Sub Sec Time: 181
Flash Pix Version: "0100"
Color Space: sRGB
Exif Image Height: 518
Interoperability Offset: 5809
Interoperability Index: R98
Interoperability Version: "0100"
Focal Plane XResolution: 3888000/877
Exif Image Width: 778
Focal Plane YResolution: 2592000/582
Focal Plane Resolution Unit: Inch
Custom Rendered: Normal process
Exposure Mode: Manual Exposure
White Balance: Auto
Scene Capture Type: Standard
---- Additional section ----
Canon PhotoEffect: Off
Macro Mode: Off
Self Timer: Off (Not Used)
Compression Rate: Fine
Image Stabilizer: Not possible to define
Flash Mode: On
Drive Mode: Single (One-Shot per Touch
================================================== ====================
---- Main section ----
Make: Canon
Model: Canon EOS 400D DIGITAL
Orientation: Normal
XResolution: 72,00
YResolution: 72,00
Resolution Unit: Inch
Software: ACD Systems Digital Imaging
Date Time: 2009:07:15 09:58:46
YCb Cr Positioning: Centered
Exif Offset: 227
Exposure Time: 1/100 sec
FNumber: F5,6
Exposure Program: Manual
ISOSpeed Ratings: 100
Exif Version: "0221"
Date Time Original: 2009:07:14 23:28:36
Date Time Digitized: 2009:07:14 23:28:36
Components Configuration: YCbCr
Shutter Speed Value: 0,0100 sec (1/100)
Aperture Value: F5,0
Exposure Bias Value: 0 EV
Metering Mode: MultiSegment
Flash: On, forced
Focal Length: 70,00 mm
Maker Note: "."
User Comment: Not possible to define
Sub Sec Time: 40
Flash Pix Version: "0100"
Color Space: sRGB
Exif Image Height: 518
Interoperability Offset: 5809
Interoperability Index: R98
Interoperability Version: "0100"
Focal Plane XResolution: 3888000/877
Exif Image Width: 778
Focal Plane YResolution: 2592000/582
Focal Plane Resolution Unit: Inch
Custom Rendered: Normal process
Exposure Mode: Manual Exposure
White Balance: Auto
Scene Capture Type: Standard
---- Additional section ----
Canon PhotoEffect: Off
Macro Mode: Off
Self Timer: Off (Not Used)
Compression Rate: Fine
Image Stabilizer: Not possible to define
Flash Mode: On
Drive Mode: Single (One-Shot per Touch)
Focus Mode: One-Shot
Image Size: Large
Easy Shooting Mode: Manual
Contrast: Normal
Saturation: Normal
Sharpness: High
Metering Mode: Evaluative
Canon AiAF: Off
ExposureMode: Full Manual (Mode 'M')
Focus Details: Single
White Balance Preset: Auto
Flash Bias: -2 EV
CCD ISO: 100
Lens Type: 24 - 70 mm
Subject Distance: Not possible to define
ImageType: Canon EOS 400D DIGITAL
FirmwareVersion: Firmware 1.0.4
OwnerName: unknown
CameraSerialNumber: 730329238
Noise Reduction: Off
Shutter AE Lock Button: AF/AE lock
Mirror Lockup: Disable
Exposure Level: 1/2 stop
AF Assist: On (auto)
AV Shutter Speed: Automatic
AEB Sequence: 0
Shutter Sync: 1st-curtain sync
Lens AF Button: AF stop
Lens Information: Not possible to define
================================================== =========
---- Main section ----
Make: Canon
Model: Canon EOS 400D DIGITAL
Orientation: Normal
XResolution: 72,00
YResolution: 72,00
Resolution Unit: Inch
Software: ACD Systems Digital Imaging
Date Time: 2009:07:15 09:58:44
YCb Cr Positioning: Centered
Exif Offset: 227
Exposure Time: 1/100 sec
FNumber: F2,8
Exposure Program: Manual
ISOSpeed Ratings: 100
Exif Version: "0221"
Date Time Original: 2009:07:14 23:29:30
Date Time Digitized: 2009:07:14 23:29:30
Components Configuration: YCbCr
Shutter Speed Value: 0,0100 sec (1/100)
Aperture Value: F3,0
Exposure Bias Value: 0 EV
Metering Mode: MultiSegment
Flash: On, forced
Focal Length: 70,00 mm
Maker Note: "."
User Comment: Not possible to define
Sub Sec Time: 806
Flash Pix Version: "0100"
Color Space: sRGB
Exif Image Height: 518
Interoperability Offset: 5809
Interoperability Index: R98
Interoperability Version: "0100"
Focal Plane XResolution: 3888000/877
Exif Image Width: 778
Focal Plane YResolution: 2592000/582
Focal Plane Resolution Unit: Inch
Custom Rendered: Normal process
Exposure Mode: Manual Exposure
White Balance: Auto
Scene Capture Type: Standard
---- Additional section ----
Canon PhotoEffect: Off
Macro Mode: Off
Self Timer: Off (Not Used)
Compression Rate: Fine
Image Stabilizer: Not possible to define
Flash Mode: On
Drive Mode: Single (One-Shot per Touch)
Focus Mode: One-Shot
Image Size: Large
Easy Shooting Mode: Manual
Contrast: Normal
Saturation: Normal
Sharpness: High
Metering Mode: Evaluative
Canon AiAF: Off
ExposureMode: Full Manual (Mode 'M')
Focus Details: Single
White Balance Preset: Auto
Flash Bias: -2 EV
CCD ISO: 100
Lens Type: 24 - 70 mm
Subject Distance: Not possible to define
ImageType: Canon EOS 400D DIGITAL
FirmwareVersion: Firmware 1.0.4
OwnerName: unknown
CameraSerialNumber: 730329238
Noise Reduction: Off
Shutter AE Lock Button: AF/AE lock
Mirror Lockup: Disable
Exposure Level: 1/2 stop
AF Assist: On (auto)
AV Shutter Speed: Automatic
AEB Sequence: 0
Shutter Sync: 1st-curtain sync
Lens AF Button: AF stop
Lens Information: Not possible to define
================================================== ========================
---- Main section ----
Make: Canon
Model: Canon EOS 400D DIGITAL
Orientation: Normal
XResolution: 72,00
YResolution: 72,00
Resolution Unit: Inch
Software: ACD Systems Digital Imaging
Date Time: 2009:07:15 09:58:45
YCb Cr Positioning: Centered
Exif Offset: 227
Exposure Time: 1/100 sec
FNumber: F2,8
Exposure Program: Manual
ISOSpeed Ratings: 100
Exif Version: "0221"
Date Time Original: 2009:07:14 23:28:18
Date Time Digitized: 2009:07:14 23:28:18
Components Configuration: YCbCr
Shutter Speed Value: 0,0100 sec (1/100)
Aperture Value: F3,0
Exposure Bias Value: 0 EV
Metering Mode: MultiSegment
Flash: On, forced
Focal Length: 70,00 mm
Maker Note: "."
User Comment: Not possible to define
Sub Sec Time: 415
Flash Pix Version: "0100"
Color Space: sRGB
Exif Image Height: 518
Interoperability Offset: 5809
Interoperability Index: R98
Interoperability Version: "0100"
Focal Plane XResolution: 3888000/877
Exif Image Width: 778
Focal Plane YResolution: 2592000/582
Focal Plane Resolution Unit: Inch
Custom Rendered: Normal process
Exposure Mode: Manual Exposure
White Balance: Auto
Scene Capture Type: Standard
---- Additional section ----
Canon PhotoEffect: Off
Macro Mode: Off
Self Timer: Off (Not Used)
Compression Rate: Fine
Image Stabilizer: Not possible to define
Flash Mode: On
Drive Mode: Single (One-Shot per Touch)
Focus Mode: Manual Focus
Image Size: Large
Easy Shooting Mode: Manual
Contrast: Normal
Saturation: Normal
Sharpness: High
Metering Mode: Evaluative
Canon AiAF: Off
ExposureMode: Full Manual (Mode 'M')
Focus Details: Single
White Balance Preset: Auto
Flash Bias: -2 EV
CCD ISO: 100
Lens Type: 24 - 70 mm
Subject Distance: Not possible to define
ImageType: Canon EOS 400D DIGITAL
FirmwareVersion: Firmware 1.0.4
OwnerName: unknown
CameraSerialNumber: 730329238
Noise Reduction: Off
Shutter AE Lock Button: AF/AE lock
Mirror Lockup: Disable
Exposure Level: 1/2 stop
AF Assist: On (auto)
AV Shutter Speed: Automatic
AEB Sequence: 0
Shutter Sync: 1st-curtain sync
Lens AF Button: AF stop
Lens Information: Not possible to define
В натуре, парни - есть о чем задуматься......
Походу Sigma лепит от вольного..... Нам расчитывать нечего:(