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。
Pentax 645Z |
Pentax 645Z compare with Sony a580 |
Pentax 645Z compare with Sony a580 |
Pentax 645Z compare with Sony a580 |
Pentax 645Z body left view |
Pentax 645Z body rear view |
Pentax 645Z LCD panel and Image plane indicator |
Diopter adjustment ring |
Mode Dial |
Mode Dial |
AF mode switching dial and viewfinder |
Metering mode switch |
Mode dial lock button |
Hot shoe |
Shutter button |
Stills/Movie switching dial |
AE lock button |
Pentax 645Z Grip |
Cable switching terminal |
Stereo microphone and speaker |
Shutter button |
Shutter button |
Shutter button |
Selection dial |
Main switch |
Raw, Exposure, AF area, Lock button |
Mirror up dial |
Camera name plate |
Pentax lens DA-645 28-45mm F4.5 ED AW SR |
Pentax lens DA-645 28-45mm F4.5 ED AW SR |
Pentax lens DA-645 28-45mm F4.5 ED AW SR |
Pentax lens DA-645 28-45mm F4.5 ED AW SR |
Pentax 645Z lens information contacts |
Lens unlock button and Lens mount index |
AF coupler |
Sync socket |
Battery door and Battery door lock knob |
Tripod socket |
Focusing screen |
Self timer lamp and Remote control receiver |
Tiltable monitor |
SD card cover and Terminal cover |
Pentax lens hood |
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