Extended exposures

Film Photography & Darkroom discussion

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Nivek
Posts: 1
Joined: Fri Jan 23, 2009 1:23 pm

Extended exposures

Postby Nivek » Fri Jan 23, 2009 1:31 pm

Hiya all.

Does anyone know where I can download an extended exposure chart I can print off to put in my camera bag.

I’m particularly interested in the times over 30 secs and reciprocity failure.

I will be taking exposures of over 30 mins.

Can anyone help?

Kevin.



miha
Posts: 44
Joined: Tue Jan 20, 2009 11:42 am

Re: Extended exposures

Postby miha » Fri Jan 23, 2009 1:57 pm

Nivek wrote:Hiya all.

Does anyone know where I can download an extended exposure chart I can print off to put in my camera bag.

I’m particularly interested in the times over 30 secs and reciprocity failure.

I will be taking exposures of over 30 mins.

Can anyone help?

Kevin.
There is no sigle chart. Each film has it`s own reciprocity failure. Check the tech data at Kodak: http://www.kodak.com/global/en/professi ... ndex.jhtml , Fuji: http://www.fujifilm.co.uk/film/film.html , and Ilford: http://www.ilfordphoto.com/products/pro ... onal+Films

pentaxpete
Posts: 86
Joined: Thu Jan 12, 2006 7:19 am
Location: BRENTWOOD,Essex,(UK)

Postby pentaxpete » Sun Jan 25, 2009 10:42 am

One 'reciprocity failure' effect you might experience with LONG time is an increase in contrast on negative materials-it is the opposite to the effect of very SHORT times such as fast flash where the negatives need extra development to combat lower contrast.
Got COMPUTERISED and 'slightly Digitised Pentax K10D' but FILM STILL RULES !


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