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Re: DXL Millennium and 8K Monstro

Re: DXL Millennium and 8K Monstro

Philip Holland

Expanding on OLPFs a bit for those who don't think about them much.

Many focus on producing cleaner images these days.  Which is why the Low Light Optimized and Standard OLPFs are pretty common, but for those looking to get "the best color" out of Monstro, give the Skin Tone - Highlight OLPF a whirl.

Each Filter blocks, reflects, or absorbs IR and UV light differently as well as effecting the underlying Color Science Calibration.  The cameras these days detect which OLPF so it's pretty transparent to the filmmaker.  Since they are blocking incoming light they have an effect on image texture/noise/grain for a given ISO Rating.  Interestingly the calibration of each works well across all the various sensor RED has on the market.  However, you'll find some sensor might be less noisy with some of these filters than you'd expect.  For instance the STH on Monstro is cleaner than Dragon due to the sensor's native color.

LLO = Least IR and Light Blocking, cleanest at higher ISO ratings.  Most prone to internal reflections.
Standard = Fairly close in transmission to the LLO, but with slightly better color.
STH = Best color, but blocks the most light hitting the sensor. Least prone to internal reflections.

Personally I haven't used the Low Light OLPF in some time. Mostly the Standard and Skin Tone - Highlight Filters since about Dragon.  If you are shooting into darkness, the LLO will certainly have it's place.

There are 3rd party OLPFs from places like KipperTie with diffusion built in for a behind the lens "always on" effect.  Those are being used on a couple shows.

Phil Holland - Cinematographer
818 470 0623

From: cml-raw-log-hdr@... <cml-raw-log-hdr@...> on behalf of Bob Kertesz <bob@...>
Sent: Sunday, October 6, 2019 11:24 AM
To: cml-raw-log-hdr@... <cml-raw-log-hdr@...>
Subject: Re: [cml-raw-log-hdr] DXL Millennium and 8K Monstro
"The filters provide an infrared (IR) and ultraviolet (UV) cut that improves color clarity and reduces noise and IR contamination."

In general, IR cut filters are notoriously tricky to get right.

Cut too much in the IR spectrum, and red reproduction is affected.

As was noted by Pawel in his post with the color triangles.


Bob Kertesz
BlueScreen LLC
Hollywood, California

Engineer, Video Controller, and Live Compositor Extraordinaire.

High quality images for more than four decades - whether you've wanted them or not.©

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