Enlarger bulb workaround

ath · Sep 19, 2011

Smudger said:
Yes, but a CFL bulb, if that's what you are suggesting,is hardly a replacement for the new technology of LED's.
Instant on, thousands of hours of reliable output, constant color temperature,or variable,in some models,dimmable output,almost zero heat output,lightweight construction..
Makes a CFL look like a Tallow Candle by comparison.

What about the CRI of LED's? "white" LEDs are far from a continuous spectrum, even worse than CFL's.

Smudger · Sep 19, 2011

You have the advantage of me sir. But,I might have known there was no easy solution..
Would this matter for B&W printing though ?
For color,yes.

Robbedoes · Sep 19, 2011

Is Ole still around here?
I want to know his experiences using his bulb alternative.
Concerning spectrum, I’m using graded paper.

Regards,

Rob

Steve Smith · Sep 19, 2011

ath said:
What about the CRI of LED's? "white" LEDs are far from a continuous spectrum, even worse than CFL's.

Use equal quantities of blue and green LEDs and vary the times of each to change grades.

(there was a url link here which no longer exists)

(there was a url link here which no longer exists)

Steve.

ath · Sep 19, 2011

Steve Smith said:
Use equal quantities of blue and green LEDs and vary the times of each to change grades.

(there was a url link here which no longer exists)

(there was a url link here which no longer exists)

Steve.

Yes. Including the limitation in max. achievable contrast with blue LED's. A continuous spectrum has the advantage that the spectrum simply goes on and one only has to filter and extend exposure...

Enlarger bulb workaround

ath

Smudger

Robbedoes

Steve Smith

ath

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