Film for reciprocity law failure

[totifoto]

I´m gonna do some reciprocity law failure shots soon, havent done that in years. What film have you been using for it?. The only film I have used is the Tri-x 125, got some great result from it.....


cant remember what devoloper I used for it though, maybe Microphen. Any suggestions?

Thanx.

 

[Chriscrawfordphoto]

Fuji Acros 100 has the best reciprocity characteristics of any black and white film. I have done 3 minute exposures that came out nice. I can't remember if i compensated exposure, but I don't beleive i had too. I used it for this shot below several yrs ago because I noticed in the instructions that it could handle extreme long exposures without much compensation.

This was shot just after the sun dropped below the horizon, last light of the day. Mamiya 645, 80mm lens, f11 or 16 at around 3 minutes.

Get a roll of Acros and read the instructions for sure to see exactly how to use it for long exposures, but i remember being happy with it

 

[teo]

I don't know if you need it, but for slides, Fujifilm is very nice, tried with minutes exposures.
Kodak ones suffer a lot instead (I've heard, not tried).

 

[venchka]

Use the search feature. I recall someone else talking about Fuji Acros and 5-6 minutes exposures without reciprocity failure. Obviously, Fuji Acros is a very good film for many reasons.

 

[rodneyAB]

check this link: http://home.earthlink.net/~kitathome/LunarLight/moonlight_gallery/technique/reciprocity.htm#acrostable

 

[Chriscrawfordphoto]

Rodney,

That link's info on acros confirms what i thought. nearly 2000 second exposures needing less than 1/5 stop extra exposure! That's so little that you could probably shoot with no comp. and not notice the error.

 

[ChrisN]

How do you meter for levels that low?

 

[boilerdoc2]

I use a Gossen Luna Pro just for nightime shots. Works great. Of course there's always a lot a leeway with long exposures.
steve

 

[Todd.Hanz]

Acros is tops for loooong exposures, heres a 2 min exposure.

Todd

 

[rogue_designer]

I've run Tmax 100 for 20-40 minute LF exposures in cathedrals (at f45-f64). Metered exposure is more like 10 minutes (actual exposure 25 minutes, f45, 90SA on Tmax100)

Tmax 400 has worse reciprocity and needs to double several times over. so Tmax 100 ends up being a "faster" film in those circumstances.

Provia 400F has excellent reciprocity handling in my experience. Requiring almost no correction up to a minute, then only 25-50% up through 10 minutes if I recall correctly.

 

[Anupam]

How do you meter for levels that low?

Usually the light level itself isn't that low but one might need to stop down, as with large format etc, resulting in long exposures. But generally I find that for night scenes, metering by eye works best.

-A

 

[Anupam]

I've run Tmax 100 for 20-40 minute LF exposures in cathedrals (at f45-f64). Metered exposure is more like 10 minutes (actual exposure 25 minutes, f45, 90SA on Tmax100)

Nice shot. The lady was really cooperative to sit that still.

-A

 

[matt fury]

Provia 100F also has excellent reciprocity characteristics.

 

[danwilly]

I found HP5+ has a relatively shallow curve as well, compares to Tri-X.

 

[rogue_designer]

Nice shot. The lady was really cooperative to sit that still.

-A

Thank you. I have 3 bracketed exposures with her in it.... she didn't move much at all for over an hour. Come to think of it, I hope she was ok.

 

[shadowfox]

Wow, I'm amazed at the quality of images in this thread.

 

[mr_phillip]

Wow, I'm amazed at the quality of images in this thread.

I was just about to say the same thing - beautiful work folks.

 

[Assaf]

Try this link:

http://mkaz.com/photo/tools/expcalc.html