数字电影制作技术 (6).pdf

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1、4/25/21|BY JON FAUER28 COMMENTSOver exposed.The sky is+4.Only a few windows are 18%gray.From FDTimes office with VariCam LT feeding an AJA U-Tap SDI to Quicktime screengrab.Normal exposure.The sky is+2.Buildings are 18%gray or darker.Under exposed.The sky is 18%gray.Everything else is darker.Day for

2、 dusk.PREVIOUSNEXT EL Zone by Ed Lachman ASCEd Lachman,ASC in Rec.709 on Panasonic VariCam 35.Ed in Panasonic VariCam V-Log.Ed Lachman with EL Zone on.See three views of Ed Lachman,ASC above.See Ed in Rec.709.Go Ed,go.See Ed in Panasonic VariCam V-Log.18%gray card,18%.See Eds EL Zone map the scenes

3、exposure.15 Stops in 15 colors.Bravo,Ed.Bravo.EL Zone is as fun and easy to use as your first reading book with Dick and Jane,and of course Spot.Run,Spot,run.Ed Lachman,ASC has come up with an incredibly intuitive,innovative and essential exposure tool.Its called EL Zone System,orjust EL Zone.Think

4、of it as a spotmeter in your viewfinder or monitor.Toggle it on or off.Each stop of exposure is represented by a color.White shows areas of the scene that are over-exposed by 6 or more stops.18%gray is normal-neutral.Black is under-exposed by 6or more stops.You can correlate the rest of the stops an

5、d their corresponding colors by remembering the acronym in a rainbow:ROY G BIV.(Red,orange,yellow,green,blue,indigo and violet).Or,print out the strip above and tape it to your monitor or EVF.User Button 1 was assigned to toggle between clean view and EL Zone overlay.EL Zone is now available on Pana

6、sonic VariCam LT and 35 via firmware updates.On the VariCam LT above,User Button 1 wasassigned to toggle between clean view and EL Zone overlay.You can assign EL Zone to the EVF and a monitor via the camerasSDI-2 output(VF-SDI).EL Zone is supported in V-LOG,V-709,V-Look1 and V-Look2.Ed explains,“I f

7、ound false color and waveform monitors much too general.They are based on IRE values,which track percentagesin voltage,arent consistent with Stop Values on lenses or light meters,and are not the same from one manufacturer to another.“So,I devised a system based on 18%gray,a universal standard for ph

8、otography.Your camera can be your lightmeter.Or use anexternal lightmeter.They will be consistent with each other.You can also use an EL Zone framegrab of a scene to precisely matchexposure and lighting at a later date for pickup shots or dreaded reshoots.”For example,lets say you come back 2 months

9、 later because the director wants an additional wide shot.The medium shot herewas lit by Tinx Chan with a single-source open-face 2K through an 88 unbleached muslin.With EL Zone,when you return,youcan be sure to match Eds monitor to be+3 stops over;Eds face to be+1 and+1/2 stop over toward the light

10、 and-2 on the shadowside.Barry Russo worked with Ed to bring EL Zone to Panasonic VariCam cameras.Additional team members who made this possibleinclude Takahiro Mitsui in Panasonic Planning and Ryohei Yamato in Panasonic Engineering.Ed continued,“I would like the thank Imago and its technical commit

11、tee for their support and encouragement that allmanufacturers embrace this technology to become a standard in the industry.”This ingenious in-camera spotmeter exposure system is a welcome and valuable innovation for cinematographers andphotographers everywhere.See Eds discussion of EL Zone on Vimeo.

12、A Room with a View and EL Zone.Testing EL Zone at FDTimes.28 Responses:TAGS:EL Zone,EL Zone by Ed Lachman ASC Film&Digital Times is made possible through the generous support of subscribers like you,and with grants from the following companies.Content is in no way linked to sponsorship.We write abou

13、t the things we use.Contact Privacy Policy Terms of Use2021 Film and Digital Times Inc.Reprint InformationART,TECHNIQUE AND TECHNOLOGY IN MOTION PICTURE PRODUCTION WORLDWIDEINTERNATIONAL EDITIONS:JapanesePortugueseFrenchSpanishChineseKoreanGET EMAIL ALERT WHEN WE POSTEnterHOMEISSUESCOLLECTIONBLOGART

14、ICLESBOOKSCONTACTSUBSCRIBE?Leave a CommentEnter your comment here.Enter your comment here.APRIL 25,2021 AT 12:40 PMKevin Emmons says:This is brilliant and long overdue.REPLYAPRIL 25,2021 AT 1:02 PMJon Fauer says:Kevin.Yes it is.And no learning curve.So simple to use.APRIL 25,2021 AT 1:02 PMLarry Rob

15、ins says:This is beautiful.Thanks Ed Lachman et al.Ive never liked the current false color system.It did notseem at all intuitive and so Ive stayed with viewing at least one monitor on set in log,plus looking at ahistogram.Both systems work for me.This would be a terrific addition to my Canon,Red an

16、d Sonycameras.I can guess which manufacturers will adopt this and which will not,but I would hope they all do.This is preciselywhat I need and it made complete sense in a NY minute.Larry RobinsBozeman,MTREPLYAPRIL 25,2021 AT 2:15 PMCarlos Congote says:Awesome,intuitive,very useful!It would be great

17、to have EL Zone system embedded in Arri,Red andSony cameras as well!Will that happen soon?As a rental house we will be happy to offer it to clients.REPLYAPRIL 25,2021 AT 2:30 PMLucas Cristo says:So intuitive and a great tool to know where your exposure is!Great to use it soonREPLYAPRIL 25,2021 AT 3:

18、36 PMSteve says:Its likely that a monitor manufacturer will implement it first.Atomos,SmallHD,Flanders I see you.REPLYAPRIL 25,2021 AT 5:23 PMEd L.says:It has to be calibrated specifically to each specific camera sensors gamma and latitude,so it wouldonly work if the monitors reflect the different c

19、ameras sensors and settings which Im not surewould be possible.It would be great if it could work that way.Thanks for your comment.MAY 9,2021 AT 4:04 AMAdam S.Hawkey says:I was inspired,so I quickly implemented a version of this into Nobe OmniScopehttps:/ a software scope system,and completely custo

20、mizable.I am interested in seeing this for othercameras as well.If anyone is interested,I would be happy to share my settings.MAY 9,2021 AT 10:22 AMJon Fauer says:Adam,Interesting!Thanks for sharing.By the way,please note that Eds EL Zone system isregistered,and I believe,patent pending.APRIL 25,202

21、1 AT 3:47 PMJacek Laskus,ASC,PSC says:Thank you Ed for this truly helpful tool.This is such an improvement on the“False colors”,and ifstandardized through all the camera manufactures will be a awesome tool for the cinematographer.Itgives you immediately the understanding of light-dark balance of you

22、r frame but it is a great referencefor any re-shoots or communication with your gaffer.For me as a cinematographer a fun and useful tool,for me as afaculty of cinematography department at AFI it is a great way to teach reflective reading and over-and under-exposure.REPLYAPRIL 25,2021 AT 8:26 PMDane

23、says:This would be a fantastic addition to the Lumix S1 line recording 4K ProresRAW.Id love for DPs to havethis option.REPLYAPRIL 25,2021 AT 8:56 PMJames McMillan says:It would be truly wonderful as a Cinematographer,to be able to reference,whether your shooting onPanavision,Arri,Red,Sony,Panasonic,

24、Canon,consistent zones of exposure with consistent color.IfCinematic camera manufacturers want to sell and help Directors of Photography this is standard theyshould all adopt,well done ED and long overdue.REPLYAPRIL 26,2021 AT 1:30 AMAndrew Hill says:LEADER devices(I own an LV5330)have this feature

25、called“Cinezone”for a long time.If my brain didnt fade:That was at least in 2006,maybe earlier.See bottom ofhttps:/www.leader.co.jp/uploads/2018/03/ca_lv5330_e.pdfREPLYAPRIL 27,2021 AT 10:03 AMBarry Russo says:Hi Andrew,EL Zone is quite different from Cinezone.EL Zone has many more delineated stepsa

26、nd is based on stop values not an IRE scale.It also based on the VariCams V-LOG or V-Looks(baked in)gamma curves.This makes readings accurate with no need for the user to interpolatewhat the values mean.Not only is EL Zone super-easy to use and understand,but having it built into the cameramakes it

27、even simpler and convenient.A final note,there is no cost for the end user,it is part of the free firmwareversion 9 update.APRIL 27,2021 AT 10:13 AMJon Fauer says:Barry,thanks for explaining and also thanks for your efforts in getting Panasonic first to this ELZone party.APRIL 26,2021 AT 2:19 AMPete

28、r Smokler says:I almost always have a difference in what I see on set and what I see in the color bay.I now bring mycamera,and monitors into the bay and and match everything up using a probe and the facility engineer.I wonder if EL profiles could be made for the different cameras that could be used

29、to match monitorsmore easily.Color bars,etc.just dont cut it.With the EL system,at least all of the brightness values would more easilytrack regardless of monitor mismatch.REPLYAPRIL 26,2021 AT 9:50 AMJon Fauer says:Peter,thats an interesting idea.APRIL 26,2021 AT 9:35 AMMr.German says:Could this sy

30、stem be turned into a Cube file for use in other monitors or cameras?REPLYAPRIL 27,2021 AT 1:11 PMLeon Brehony says:https:/we.tl/t-qtGZcIjb2kAPRIL 26,2021 AT 4:23 PMSteven Breckon says:It looks like a very promising system!I love the simplicity of one stop increments and the color spectrumchosen.Loo

31、ks very intuitive I would love to see it incorporated into Arri,Sony and PV/RED cameras.REPLYAPRIL 26,2021 AT 6:29 PMChris Li says:The beauty is in the simplicity of it all.Now if all the camera manufacturers can fall in line.Thank you,ELREPLYAPRIL 27,2021 AT 1:06 PMLeon Brehony says:This is a much

32、better alternative to false colour,thanks!I made a.cube LUT using a gradient map inphotoshop which represents the values shown above(very rough but might be a useful reference untilcamera manifacturers pull their fingers out and probably not hugely useful for non-panasonic LOGprofiles)downloadable h

33、ere:https:/we.tl/t-qtGZcIjb2kREPLYAPRIL 27,2021 AT 1:11 PMLeon Brehony says:Hi,this is a brilliant idea.I made a(poorer quality).cube LUT version in photoshop,if anyone is curiousto try it:https:/we.tl/t-qtGZcIjb2k As mentioned,it wont be as useful as something intergrated andcalibrated directly wit

34、h the camera manufacturers LOG profilesREPLYAPRIL 27,2021 AT 4:37 PMRobert says:Wow.Finally something that makes sense.RED could really use this their“gio scope”is less than userfriendly(to be polite).Arri would be wise to integrate too.REPLYAPRIL 27,2021 AT 5:00 PMBuddy Squires,ASC says:Eds adaptat

35、ion of Ansel Adams Zone System to the digital world is a game changer.For any disciple ofphotography,Ansel Adams stunning and iconic landscapes underscore the paramount need for preciseexposure control in the creation of indelible images.EL Zone is a tremendous gift to all of us who havebeen endless

36、ly frustrated by the imprecise nature of digital exposure.We finally have a tool that is much more accuratethan false color,zebras,or waveforms.EL Zone brings back the direct relationship between lighting and lens stops thatinform so much of image creation.Thank you Ed!Buddy Squires,ASCREPLYAPRIL 28

37、,2021 AT 11:04 AMGeoff Smith says:This is extremely useful and most welcome!One could use a chart likehttp:/ to plot the color&stop ranges for someof the other popular Log curves.Though the chart uses“IRE”for units(derived from ACES IDTs),youcould substitute the appropriate code values for e.g.a 3D

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