Cinematography Mailing List

Blue & Green Screen tests

The grey scales in each shot were matched, the ones with green backing had a much higher flare content and were much harder to balance to a neutral grey. This is why the black levels are so high.

The exposure readings are from a Pentax spotmeter reading the foreground and background grey cards.

There was much less flare and spill from the blue screen than from the green, the midtones of the green shots was severely effected.

The finished commercial is at the bottom of the page

---

 

Foreground-----9------Background-----8.3

Area-----------R------------G-------------B

White--------253----------254----------249

Grey---------145----------143----------140

Black-----------2------------7-------------2

Grey patch-----3-----------48----------254
lit with Blue

Blue Screen----7------------20---------255

Foreground---------9--------Background-----7.66

Area---------------R------------G-------------B

White-----------250----------241----------245

Grey------------146----------146----------156

Black-------------3-------------3-------------3

Grey patch-------6------------16-----------253
lit with Blue

Blue Screen------7-------------3-----------229

Foreground---------9--------Background-----6.66

Area---------------R------------G-------------B

White------------254----------255----------233

Grey--------------141----------139---------140

Black---------------3-------------7------------1

Grey patch---------5-------------8-----------209
lit with Blue

Blue Screen--------3-------------4----------165

Foreground---------9--------Background-----8.3

Area----------------R------------G-------------B

White-------------252----------237----------243

Grey--------------146----------139---------139

Black--------------18-------------1------------28

Grey patch--------39-----------194----------102
lit with Green

Green Screen-----46----------255-----------70

Foreground---------9--------Background-----7.3

Area----------------R------------G-------------B

White-------------252----------254----------255

Grey--------------142----------130---------151

Black--------------29-------------0------------31

Grey patch--------37-----------143-----------78
lit with Green

Green Screen-----45------------225----------68

 

Foreground---------9--------Background-----6.3

Area----------------R------------G-------------B

White-------------253----------250----------251

Grey--------------148----------147----------142

Black--------------24------------28-----------32

Grey patch--------36------------98-----------51
lit with Green

Green Screen-----35-----------169-----------47

Link to finished commercial, it's a large file, be patient