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View Full Version : HPX ISO and "Clean" scene file.


dolby
08-23-2007, 10:21 AM
After a while of playing and tweaking last night, I think I have found the correct ISO for this camera using the exposure card from Adobe on location and light meter.

With the camera set up for 720p/24 - 180 degree shutter and the scene file below these are the ISO numbers I have come up with.

ND 1 - ISO-800
ND 2 - ISO-200
ND 3 - ISO-50
ND 4 - ISO-12

ND 1 w/6db gain - ISO-1600
ND 1 w/12db gain - ISO-3200

Note - the these ISO number are calibrated to the iris ring on the lens of the Fujinon 17x lens.

http://clients.26inchaudio.com/HPX/HPX_cal1.jpg

720p frame grab - http://clients.26inchaudio.com/HPX/HPX_Cal1.png


My tweaked "clean" scene file

SCENE NAME :CALIBD
00005000: 1 ; OPERATION TYPE: FILM CAM
00005001: 14 ; FRAME RATE: 24 FRAME
00005002: BE026801 ; SYNCRO SCAN :
00005003: 10 ; DETAIL LEVEL: 2
00005004: 8 ; V DETAIL LEVEL: 0
00005005: 9 ; DETAIL CORING : 1
00005006: 10 ; CHROMA LEVEL: 2
00005007: 9 ; CHROMA PHASE: 1
00005008: 8 ; COLOR TEMP Ach: 0
00005009: 8 ; COLOR TEMP Bch: 0
0000500A: 117 ; MASTER PED: -11
0000500B: 16 ; A.IRIS LEVEL: 0
0000500C: 1 ; NEWS GAMMA: OFF
0000500D: 6 ; GAMMA : CINELIKE V
0000500E: 1 ; KNEE: MID
0000500F: 3 ; MATRIX: CINE-LIKE
00005010: 1 ; SKIN TONE DTL : OFF
00005011: 0 ; V DETAIL FREQ : THIN
hunter richards
08-24-2007, 02:10 PM
Thank you for the iso help!

-hunter
TimurCivan
08-24-2007, 03:39 PM
the shadows under her chin are spotless....... Wow... I like.
dolby
08-24-2007, 04:38 PM
Did the same setup on a DVX100 and HVX200 last night and came up with this.

DVX ISO = ~1000-1200

HVX ISO = ~250-320

Can get any precision since both have a servo iris.
hunter richards
08-24-2007, 06:41 PM
whoa! -11 on the master pedestal? whats that all about?
dolby
08-25-2007, 06:36 AM
whoa! -11 on the master pedestal? whats that all about?

On the DVX100 and HVX200 the Master Ped setting is variable from -15 to +15 and 11 would be a very low setting. The HPX500 is a bit more adjustable on the Master Pedestal setting with a range of -100 to +100.
raphavf
08-25-2007, 11:09 PM
Why this preset for?
hunter richards
08-26-2007, 07:23 PM
That explains it! thanks.

Can you post a 1080 grab like this? or any 1080 grabs in the png format?

Thanks again!
TimurCivan
08-26-2007, 09:35 PM
Did the same setup on a DVX100 and HVX200 last night and came up with this.

DVX ISO = ~1000-1200

HVX ISO = ~250-320

Can get any precision since both have a servo iris.

I dont think the DVX is that fast... Maybe in Interlace mode?

Hvx sounds about spot on.