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Nikon Swing-Out 0.9 Condenser

Sometimes called flip-top
I have yet to get sharp focus on the field diaphragm thru this condenser.

iris diaphragm

Interaction with field diaphragm is so far confusing;
iris is nearly in focus at times...?

Useful field

Pending sorting focus issues.

field uniformity

likewise...
maintained by blekenbleu