[jeffpoon]

之前收到一位師兄E-MAIL，話之前搵人幫佢改左部GF1做全彩紅外線，話已經SET好WB叫佢返屋企慢慢試，點知師兄返去試來試去都影唔到紅外線效果，裝左塊IR720上去之後快門超慢，同未改機無乜分別，好好陽光之下影出來都好多NOISE。又教佢將原廠既LOW PASS FILTER DIY放響鏡頭前就可以影返正常效果照片，鏡頭大，FILTER細，夾硬DIY，入光量減少左，仲有可能出現黑邊添。

我聽到佢呢個CASE都估到乜事，叫佢比部機我搞返掂。拎到部機返來，拆機睇下先，發現塊FILTER呎吋點解差咁多既，厚度相差約30%:L

我從頭到尾幫佢改返一次，今日比返部機個師兄，佢十分滿意，仲話早知之前唔貪平啦:titter:

厚度相差大約30%，再度下個厚度，好大機會係街買UV FILTER返來自行切割:L
[img]http://images4.fotop.net/albums4/jeffpoon/IRTutorial/FilterSizeComparison.jpg[/img]

夾硬將原本塊LOW PASS FILTER DIY放響鏡頭前影相，入光量定必大大減少，仲有機會出現黑邊添。幾時都係裝返正規FILTER好D
[img]http://images4.fotop.net/albums4/jeffpoon/IRTutorial/LowPassFilter.jpg[/img]

師兄自己買左塊B+W UV-IR CUT，諗住用佢影返正常相，但係效果偏紅。
[img]http://images4.fotop.net/albums4/jeffpoon/IRTutorial/PanasonicGF1_5.jpg[/img]

用Jeff UV-IR Cut Filter去影，色彩還原度好很多
[img]http://images4.fotop.net/albums4/jeffpoon/IRTutorial/PanasonicGF1_6.jpg[/img]

用IR720試影
[img]http://images4.fotop.net/albums4/jeffpoon/IRPhotoShare/PanasonicGF1_4.jpg[/img]

[img]http://images4.fotop.net/albums4/jeffpoon/IRPhotoShare/PanasonicGF1_3.jpg[/img]

[img]http://images4.fotop.net/albums4/jeffpoon/IRPhotoShare/PanasonicGF1_2.jpg[/img]