Sony SAL35F14G service manual Focus-shift mm = 0 to +0.15 Perform the 4-9. Write dSB

Page 63

4-5. FOCUS-SHIFT CHECK/ADJUSTMENT (APERTURE (AMOUNT OF SPHERICAL ABERRATION))

This section describes the check/adjustment of focus-shift amount resulting change of focal-length by aperture setting.

Equipment

•1000 mm Collimator

•Flange Back Tester

•A-mount Attachment

•Flange Back Gauge (43.50mm)

•Aberration measuring cap 55mm (SAL35F14G)

1. Preparations

1)Perform “1. Preparations” of “4-4-1. Flange Back (f’F) Check”.

2)Set the checking lens focus to the infinite.

2. Checking Method

1)Set the lens aperture to the open aperture position, and measure the flange back (f’F).

2)Set the aberration measuring cap 55mm (F8 equivalent) on the tip of lens as shown in the Fig.4-5-1, then measure the flange back (f’F).

Aberration measuring cap 55mm (SAL35F14G)

Fig.4-5-1

3)Calculate amount of focus-shift using the following formula, and check that the specification is satisfied.

Note: The focus-shift amount of the checking lens is difference between the flange back (f’F) of open aperture and flange back (f’F) reading (using aberration measuring cap 55mm).

Focus-shift = flange back (f’F) of open aperture reading - Flange back (f’F) reading (using aberration measuring cap 55mm)

Specification

Focus-shift (mm) = 0 to +0.15

4)Perform the “4-9. WRITE dSB”.

SAL35F14G (1.4/35G) (35mm F1.4G)

4-24

Image 63

Contents Service Note Repair Parts List Specifications DisassemblySpecifications Table of Contents Service Note Safety CHECK-OUT Aperture Trouble TroubleshootingFocus trouble Function NG Position NG Focus TroubleDisassembly Exploded View Ornamental Ring Block Outer Tube and Joint Tube Fixed Tube Block and Distance Control Tube Ornamental Ring Block and Focus Hold Button Base GROUP, 2 Group and 3 Group Lens Block HELP01 HelpHELP02 HELP03 HELP05 HELP04HELP07 HELP06HELP08 HELP09HELP10 HELP11 HELP12 HELP13 G7 G8 G9 G10 HELP14HELP15 HELP16 HELP17 HELP18 HELP19 HELP21 HELP20HELP23 HELP22Exploded Views Repair Parts ListLens Mount Riveting Block and Light Inter Ception Tube Outer Tube and Joint Tube 161 163 162 164 165 151 152 154 155 153 156 157 158 159 160 161202 203 209 208 204 205 212 213 211 253 255 Ref. No.60 Ref. No.73Ref. No.110 Checking supplied accessories Other accessories Supplied AccessoriesPreparations List of Service Tools and EquipmentsChart Mm collimator Lens Adjustment Program ActuatorChecker Download of PC card setup file InstaCal.exeEquipment used SAL35F14G 1.4/35G 35mm F1.4G Setup of PC Card SAL35F14G 1.4/35G 35mm F1.4G SAL35F14G 1.4/35G 35mm F1.4G Confirmation of PC card setting Startup of Lens Adjustment Program ActuatorChecker.exe Finished Inspection JIG Lens EquipmentInitial Setting of ActuatorChecker Model Aperture Diameter CHECK/ADJUSTMENT Aperture Diameter CheckPreparations Checking of Image Checking Method SpecificationAperture Diameter Adjustment Adjusting Method Projective Resolving Power Check Plane mirror Number of the smallest pitched lines Flange Back f’F Check Flange Back f’F CHECK/ADJUSTMENTFrange Back f’F Check Optical Axis AdjustmentOver Infinity Infinity End Flange Back f’F Adjustment Focus-shift mm = 0 to +0.15 Perform the 4-9. Write dSB Click ROM Data Lens ROM CheckCase of error display in the ROM Data Focus Brush Position Check Search Focus Adjustment Point Focus Brush Position CHECK/ADJUSTMENTCase of error display in the Search Focus Adjustment Point Click the Focus Adjustment Point Focus Brush Position Check Focus Adjustment PointCase of error display in the Focus Adjustment Point Click the Focus Pattern Focus Brush Pattern CheckFocus Brush PatternCase of error display in the Focus Pattern near position Case of error display in the Focus Pattern infinity position Click the Focus Hold Button Focus Hold Button Check Focus Hold ButtonCase of error display in the Focus Hold Button Write dSB Case of error in the Write dSB Finding a text Switching aApplication of printing Reversing the screens displayed onceVer Contents Rev Issued