pburke
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Dustin Gent wrote:
hmm, interesting. I know that there are two versions, the old ones and the new "UMC" ones, which is what I have. I was reading up on the advantages of the chipped ones over the non-chipped ones, and looks like you can "fine tune" it..
here is a thread over at dpreview
you can focus fine tune any lens once you have it in the non-CPU lens database. The value of the chip can be summarized in two things - you can set the aperture on a body wheel, and the EXIF will say 14mm Samyang lens somewhere in it, while my lens shows up as a 15mm focal length somewhere else in the EXIF (Nikon won't allow you to set a 14mm since they never made a 14mm manual, but so what)
here's the EXIF from a 14mm non-chipped lens minus all the camera raw stuff on a D600 after setting it up as a 15mm f/2.8 non-CPU lens
Date Created 2013:04:21 09:28:46.003
1 month, 25 days, 21 hours, 15 minutes, 49 seconds ago
XMP Toolkit Adobe XMP Core 5.0-c061 64.140949, 2010/12/07-10:57:01
Creator Tool Adobe Photoshop CS5.1 Windows
Modify Date 2013:04:24 22:54:09-05:00
1 month, 22 days, 9 hours, 50 minutes, 26 seconds ago
Rating 0
Metadata Date 2013:04:24 22:54:09-05:00
1 month, 22 days, 9 hours, 50 minutes, 26 seconds ago
Make NIKON CORPORATION
Camera Model Name NIKON D600
Orientation Horizontal (normal)
Software Adobe Photoshop CS5.1 Windows
Copyright 2013 Peter Burke
Exposure Time 1/640
F Number 8.00
Exposure Program Aperture-priority AE
Exif Version 0221
Date/Time Original 2013:04:21 09:28:46
1 month, 25 days, 21 hours, 15 minutes, 49 seconds ago
Shutter Speed Value 1/640
Aperture Value 8.00
Exif Image Size 1,024 × 684
ISO 100
Sensitivity Type Recommended Exposure Index
Exposure Compensation -2
Max Aperture Value 1.0 <--- it has no idea about this
Metering Mode Multi-segment
Light Source Unknown
Flash Off, Did not fire
Focal Length 15.0 mm
Sub Sec Time 30
Sub Sec Time Original 30
Sub Sec Time Digitized 30
Color Space Uncalibrated
Focal Plane X Resolution 167.5014954
Focal Plane Y Resolution 167.5014954
Focal Plane Resolution Unit mm
Sensing Method One-chip color area
File Source Digital Camera
Scene Type Directly photographed
CFA Pattern [Red,Green][Green,Blue]
Custom Rendered Normal
Exposure Mode Auto
Digital Zoom Ratio 1
Focal Length In 35mm Format 15 mm
Scene Capture Type Standard
Gain Control None
Contrast Normal
Subject Distance Range Unknown
Serial Number 3047040
Lens Info 0mm f/0
Lens Model 0.0 mm f/0.0 <--- chipped lens will have this data
Compression JPEG (old-style)
Y Resolution 72
Modify Date 2013:04:24 22:54:09
1 month, 22 days, 7 hours, 50 minutes, 26 seconds ago
Create Date 2013:04:21 09:28:46
1 month, 25 days, 21 hours, 15 minutes, 49 seconds ago
Resolution 240 pixels/inch
X Resolution 72
Thumbnail Length 11,414
White Balance Auto
Saturation Normal
Sharpness Normal
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Clearly, focus was dead on, so the lens qualifies as a manual focus compatible with impaired operators.
