single vs double condenser

Murray@uptowngallery · Sep 20, 2007

I see some enlargers configured with one or two condenser lenses.

I thought I read somewhere a second condenser shortens the height of the enlarger.

What is the difference in light uniformity between a single and double condenser. If spacing and height are not a concern, can a single condenser suffice?

Thanks

firecracker · Sep 20, 2007

I have no idea, but mine(Fuji FD690 which covers from 35mm to 6x9cm) has three. I heard the reason the 3rd condenser was added to this model was to control and even out the light for use of a 50mm lens. All the previous models in this series (Fuji 690 series) had two condensers...

dancqu · Sep 24, 2007

Murray@uptowngallery said:
If spacing and height are not a concern, can a single
condenser suffice? Thanks

The combined refractive power of a double condenser
is great. Usual focal lengths of the pair are in the inches.
I wonder though of lens abberations using a single lens
condenser. Although a well corrected achromat as
such is not the objective of a double condenser
the pair may perform better. Dan

Murray@uptowngallery · Sep 24, 2007

I forgot about aberration correction thru symmetry. Thanks

single vs double condenser

Murray@uptowngallery

firecracker

dancqu

Murray@uptowngallery

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