WiFi 頭痛 - 分享我親身體驗WiFi導致頭痛的原理和成因
我有 「WiFi 敏感」症狀,我的病徵是類似偏頭痛的感覺,痛楚整天都在頭上纒繞著,痛感有時輕微,有時嚴重。 c1x3
同事借咗一部Pentax 2014年的旗艦全片幅「大底機」645Z 回來,這部機重1.5kg,非常重手,目前機身售價55000元,它有非常大的CMOS。
我拿起把玩了幾下,發現負責托住部機的左手不夠一兩分鐘即感到疲勞,它應該是特種部隊才能用的傢伙。
開著部機按了幾下鈕掣,感覺它對焦不快速,有時很慢和對不準。觀景器雖很突出,但視野不是特别大,也不特别清楚。玩了幾下就放下,實在太笨重沒有便携性。
第二次拎覺得無咁重,拎住用ISO800 影咗幾張樓下既街景,發覺影得幾清,手震較少。反而用Sony A7II 105mm去影,手震很嚴重,首次發現這部機強勁之處。
分享一些機身和鏡頭的照片。
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Pentax 645Z |
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Pentax 645Z compare with Sony a580 |
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Pentax 645Z compare with Sony a580 |
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Pentax 645Z compare with Sony a580 |
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Pentax 645Z body left view |
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Pentax 645Z body rear view |
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Pentax 645Z LCD panel and Image plane indicator |
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Diopter adjustment ring |
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Mode Dial |
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Mode Dial |
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AF mode switching dial and viewfinder |
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Metering mode switch |
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Mode dial lock button |
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Hot shoe |
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Shutter button |
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Stills/Movie switching dial |
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AE lock button |
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Pentax 645Z Grip |
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Cable switching terminal |
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Stereo microphone and speaker |
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Shutter button |
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Shutter button |
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Shutter button |
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Selection dial |
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Main switch |
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Raw, Exposure, AF area, Lock button |
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Mirror up dial |
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Camera name plate |
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Pentax lens DA-645 28-45mm F4.5 ED AW SR |
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Pentax lens DA-645 28-45mm F4.5 ED AW SR |
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Pentax lens DA-645 28-45mm F4.5 ED AW SR |
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Pentax lens DA-645 28-45mm F4.5 ED AW SR |
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Pentax 645Z lens information contacts |
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Lens unlock button and Lens mount index |
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AF coupler |
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Sync socket |
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Battery door and Battery door lock knob |
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Tripod socket |
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Focusing screen |
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Self timer lamp and Remote control receiver |
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Tiltable monitor |
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SD card cover and Terminal cover |
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Pentax lens hood |
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