New Portra 400 - Reciprocity charts & push/pull?

[Jeff Bannow]

Anyone have a chart or information on reciprocity corrections for the new Kodak Portra 400?

Also, how about pushing to 800 or 1600 ISO? Anyone tested this yet?

 

[SWphoto]

This may be of interest (I understand Kodak has nothing available):

http://figitalrevolution.com/2011/01/03/kodak-portra-400-pinhole-reciprocity-test/

Rick

 

[Athiril]

I've pushed to 1600, and shot at 1250-6400.

1250-1600 is best (obviously) @ 1600, actually it's excellent.

Other's have pushed to 3200 with excellent results. While it's perfect at 400, I would recommend overexposing a third to two thirds of a stop when pushing, ie: shoot at 1000 pr 1250 for a 1600 push, or 2000 or 2500 for a 3200 push, it really helps with the margin of error with even great metering.


OCAU Melb Photowalk Week 2 #6 by athiril, on Flickr

 

[wildbill]

I've wondered why film manufacturers don't publish the reciprocity characteristics out to minutes. They spend all this money configuring a "new" film and leave things like this for speculation.

 

[Tim Gray]

As a starting point, use whatever you used for Portra 400NC.

This might be of interest:
http://nightflyphotography.blogspot.com/2011/02/test-report-kodaks-new-portra-400-color.html

 

[Jeff Bannow]

Thanks everyone for the great info.

 

[Tony-S]

I've pushed to 1600, and shot at 1250-6400.

When you have the film developed, what time do you use for the developer when shooting at 1600? I assume you keep it at 102F?

 

[Athiril]

Same temp. 4 minutes 15 seconds.

 

[Tony-S]

All right - thanks!