diffusion chambers for differnt size film?

trythis

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Sep 26, 2013
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Just started playing with a new to me Besesler computerized dichro head 45.
In the pile of stuff are two extra diffusion chambers with different sized outputs. 6x7 for one, the other I dont remember.

Would I benefit from swapping out the 4x5 if I only rarely shoot with anything over 645? I have a few 6x12 and 6x6 cameras but dont use them often.

having the smaller chamber gets me more light?

Do people swap them for each negative size just like lenses?
 

MattKing

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The smaller boxes will give you more light, so will shorten exposures.

They may also help you avoid some flare.

I almost never switch mine.
 

grahamp

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I have two enlargers. One (the old model with front supports) has the 6x7 mixing box and is limited to smaller formats (though I have a 4x5 mixing box for that head as well). The newer enlarger has the 4x5 mixing box, and is used for 6x9 and up.

I have to admit that when I only had the one 45S head, I left the 4x5 mixing box in 95% of the time.
 

ic-racer

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In the Dust LARABOX system, going from the 4x5in box to the 6x9cm light box gains 1/3 of a stop.
In the Omega D5500 system, 6x9cm negatives have to be printed on the 5x5in box. Going from the 5x5in box to the 7x7cm box gains 1 stop.
 
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