Long exposure time for printing

RalphLambrecht · Sep 28, 2009

WGibsonPhotography said:
Possibly

One of my photography instructors once told the class "the best way to learn something is to f**k something up"

Very true!

AmandaTom · Sep 28, 2009

Hmm, if wisdom is related to stupidity, I should be a photo swami by now.

I'm not.

pentaxuser · Sep 28, 2009

Just as a matter of interest is it possible to get a decent print with an exposure as long as 7 minutes. In asking this question I am ruling out very large prints, say several feet across or may be even not then!

With my Durst 605 and a 75W bulb I get exposures of way less than 20 secs even at f11, using dual filtration and at 8x10. Even with the inverse square law, what would need to be the size of print to get anywhere near 7 mins? Dodging would be very relaxed if a little tiring waving hands for several minutes but burning might take all night - literally :

pentaxuser

WGibsonPhotography · Sep 28, 2009

pentaxuser said:
Just as a matter of interest is it possible to get a decent print with an exposure as long as 7 minutes. In asking this question I am ruling out very large prints, say several feet across or may be even not then!

pentaxuser

I was pretty much getting used to the way my "darkroom" was setup during that session. It was the first time I actually tried to print anything with my setup. I just picked a random negative of a duck to print.

I spent a few sheets of paper before I found an exposure that looked good. The print looked very good, but I was bored out of my mind waiting seven minutes for the exposure

Anscojohn · Sep 28, 2009

pentaxuser said:
Just as a matter of interest is it possible to get a decent print with an exposure as long as 7 minutes. In asking this question I am ruling out very large prints, say several feet across or may be even not then!

With my Durst 605 and a 75W bulb I get exposures of way less than 20 secs even at f11, using dual filtration and at 8x10. Even with the inverse square law, what would need to be the size of print to get anywhere near 7 mins? Dodging would be very relaxed if a little tiring waving hands for several minutes but burning might take all night - literally :

pentaxuser

*****
We made ten foot high prints for a local rock music emporium back in the 1960s. We used a Beseler 45H rocked back for wall projection. Mural paper was stapled to a wall. We would walk (tip toe) through the exposure light from one room to another. Exposure times were fifteen, twenty minutes.

Long exposure time for printing

RalphLambrecht

AmandaTom

pentaxuser

WGibsonPhotography

Anscojohn

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