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Pentax 77420 - Page 78

Pentax 77420
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8.[Adjustment ] Shutter speed adjustment by histogram
*Method for adjustment is the same as 76830 (K10D) and 76700(K100D)
[Caution1] When replaced 0-000 or T100, this adjustment is required.
[Caution2] [Adjustment (BV adjust) and M-Test] should be completed before execute this adjustment.
[Required equipment]
Programmed software for 77420 (Kr_PDCAdj)
PC (Windows Xp with equipped USB port)
Diaphragm set ring F8 (KA-0-1A) and aster lens D20 or D20-01(or FA50mm F1.4)
Light source which has LV8 or LV9 USB cable AC adaptor kit
Scale (To prevent scratch, plastic scale is recommended)
8-1.Setting the camera
Setting the camera as follows.
Mode dial: [M], Focus lever: [MF]
WB: Tungsten light
Taking picture: Instant review [Display time: 5 second, Setting Histogram display]
Custom setting: 1. EV Steps --- [2: 1/2 EV]
2. Sensitivity steps --- [2: As AV steps]
22. Using Aperture Ring --- [2: Permitted] (When attached master lens)
Setting for Light source, Tv and ISO
LV8 LV9
Shutter speed (ms)
1/250 1/4000 1/500 1/4000
ISO sensitivity
ISO200 ISO3200 ISO200 ISO1600
*Set lens aperture full open (F1.4)
8-2.Procedure for taking picture
①Set the light value at LV8 (or LV9) and Set lens aperture full open (F1.4).
②Set ISO sensitivity to 200 and Tv250.(If using LV9, set ISO200 and Tv500)
③Attach F8 setting ring and master lens D20 or D20-01 to the camera. (Or FA50mm F1.4)
④Set the camera to the light source--- [Note] To avoid the light from outside, shield the light source.
⑤Capture 3 images. Put mark by such as paper tape at peak of average (Right end) as shown in figure
below. --- Standard data
⑥The same light value and aperture. Set ISO sensitivity to 3200 and Tv4000 (If using LV9, set ISO1600
and Tv4000)
⑦Set the camera to the light source and capture 5 images then put mark at peak of average
---Tv4000
(Adjust Tv)