Luminous Landscape Forum

Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: Fritzer on December 20, 2011, 02:21:12 pm

Title: DB and unfiltered tungsten lighting - any issues ?
Post by: Fritzer on December 20, 2011, 02:21:12 pm

I'm wondering if any of you have experience with shooting tungsten lighting, without using color correcting filters , but color correct the files in the Raw converter (Leaf Capture).

I'll be using my Aptus 75 in the studio, and need the results to be neutral in color .

The lights will be Dedolights, Arris and such, all proper halogen tungsten lamps .

Title: Re: DB and unfiltered tungsten lighting - any issues ?
Post by: mediumcool on December 31, 2011, 10:30:42 pm

I’ve done this in an emergency, doing grey balance on my Aptus 22. Here are some examples:

Screenshots from C1 showing two frames of a session; first frame shot with daylight balance (available fluoros, tungsten, daylight).

(http://img97.imageshack.us/img97/3729/session1a.jpg)

Grey-balanced on leather vest; close.

(http://img265.imageshack.us/img265/5993/session2a.jpg)

This one was balanced on the Aptus, using the OOF grey table on the RHS of the frame as the neutral target (seemed a little warm to me).

(http://img694.imageshack.us/img694/3214/session3a.jpg)

Painting on MLKSHK (http://mlkshk.com/p/8EQM).

If doing colour-critical work such as art repro, you can use greyscales or colour-checker cards to maintain control. You can also check histograms in Photoshop to see if there is any combing (http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/Histogram_01.htm); 48 bits is a lot of information, so I haven’t seen any problems yet.

HTH

Title: Re: DB and unfiltered tungsten lighting - any issues ?
Post by: HarperPhotos on December 31, 2011, 10:47:45 pm

Hello,

I use Dedo’s when shooting table top product, food and cars using my Leaf Aptus 75 and have no issues with colour correction in CS5 ACR.

Cheers

Simon

Title: Re: DB and unfiltered tungsten lighting - any issues ?
Post by: K.C. on January 01, 2012, 09:35:45 pm

I shoot with Dedos any time I can, they're such great lights.

Just remember that if you're dimming them your K will drop a couple of hundred degrees at low power compared to full. They're typically a  little cooler than my Arris. That of course depends on the bulb in the Arri.

In my studio Dedo's run 3200K to 3400K and Arris 2900K.

Title: Re: DB and unfiltered tungsten lighting - any issues ?
Post by: Fritzer on January 03, 2012, 05:10:06 pm

Thanks a lot, just what I wanted to hear . ;)

Title: Re: DB and unfiltered tungsten lighting - any issues ?
Post by: Schewe on January 03, 2012, 10:32:08 pm

Quote from: Fritzer on January 03, 2012, 05:10:06 pm

Thanks a lot, just what I wanted to hear . ;)

Just be aware that shooting under tungsten stresses the blue response of the chip. Remember only 1/4 of all the photo sites are blue response and the amount of blue light in tungsten is very, very low. As a result, you'll end up with noisier captures under tungsten when daylight balanced. Note adding even 1/2 or 1/4 CTO blue to the lights helps a lot. Alternatively, this is a case where ETTR can also help reduce the noise and improve SNR. In any case, this is a situation where you don't want to underexpose and try to make big moves in post.