Support our Sponsors, they keep FADU free:   AG Photographic   The Imaging Warehouse   Process Supplies   RH Designs   Second-hand Darkroom Supplies  

Notices

Go Back   Film and Darkroom User > Equipment > Filters

  ***   Click here for the FADU 2015/2014 Yearbooks   ***

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 23rd April 2015, 06:02 AM
cesare cesare is offline
Friend
 
Join Date: Aug 2009
Location: Brighton
Posts: 350
Default Red filter for darkroom illumination

I'm wanting to make some filters for white light LEDs to work in my darkroom, but am struggling to find an easy source of suitable filter material.

I'm only using B&W materials, so a standard red filter will be perfect. What should I be looking for to find a sheet of suitable material to cut down to size?
Reply With Quote
  #2  
Old 23rd April 2015, 06:21 AM
Richard Gould Richard Gould is offline
Friend
 
Join Date: Dec 2008
Location: Jersey Channel Islands
Posts: 5,433
Default

Try contacting srb, there is a contact in the links section, or perhaps Lee filters, I think they do gelatin red sheets that can be used for filters
Richard
Reply With Quote
  #3  
Old 23rd April 2015, 06:42 AM
cesare cesare is offline
Friend
 
Join Date: Aug 2009
Location: Brighton
Posts: 350
Default

Thanks richard, i've dropped them an email
Reply With Quote
  #4  
Old 23rd April 2015, 10:45 AM
paulc paulc is offline
Friend
 
Join Date: Jan 2010
Location: Nestled in the foothills of Norfolk.
Posts: 931
Default

Lee Filters do a wide range of gels aimed at stage lighting. These gels are quite often used for "mood lighting" as well as other applications - They even do kits so that standard fluorescent tubes.

I have a sheet of the #027. If you wanted to try a piece, I can pop a bit in the post.
Reply With Quote
  #5  
Old 23rd April 2015, 12:23 PM
Argentum's Avatar
Argentum Argentum is offline
Friend
 
Join Date: Sep 2008
Location: Sceptred Isle
Posts: 3,066
Default

I think you would need a tricolour red 25 if you want cut out all green and blue.

See http://www.leefilters.com/index.php/camera-directory/camera-dir-list/category/tricolour
Reply With Quote
  #6  
Old 23rd April 2015, 01:55 PM
JOReynolds JOReynolds is offline
Friend
 
Join Date: Nov 2012
Location: St Albans UK/Agde France
Posts: 1,074
Default wrong starting point

Why start with a white LED array if you want red light? Buy red LEDs.
Reply With Quote
  #7  
Old 24th April 2015, 05:43 PM
JohnX JohnX is offline
Friend
 
Join Date: Jan 2014
Location: West Yorkshire
Posts: 134
Default

Somebody suggested Rubylith, so I tried it over an 8w florescent box light, and it works fine..

Rubylith
Reply With Quote
  #8  
Old 1st May 2015, 08:43 PM
cesare cesare is offline
Friend
 
Join Date: Aug 2009
Location: Brighton
Posts: 350
Default

Why not a red LED? Well, basically the ones I have aren't dimmable, and are very bright. I had a bit of exposed film in front to reduce these down, but wanted to try a red filter on normal LEDs as the normal bulbs I have are dimmable...
Reply With Quote
  #9  
Old 6th October 2015, 08:33 AM
cndnlfartist cndnlfartist is offline
Friend
 
Join Date: Oct 2015
Location: British Columbia, Canada
Posts: 52
Default

Although it doesn't really answer your question a friend of mine uses a Red LED flashlight in his darkroom when he needs to find something.
He doesn't shine it directly on the paper, otherwise he would probably fog the print but it does work.
A regular safe light will fog the paper if it's too bright.
Reply With Quote
  #10  
Old 6th October 2015, 08:52 AM
DaveP DaveP is offline
Friend
 
Join Date: Dec 2009
Location: Sheffield
Posts: 990
Default

Wouldn't red LEDs give out a very narrow spectrum of light compared to an incandescent bulb? (Due to the way they produce light based on discrete energy levels within the atoms of the semiconductor). So in theory at least you could probably get away with relatively bright LED illumination with no danger of fogging paper?
Reply With Quote
Reply
Support our Sponsors, they keep FADU free:   AG Photographic   The Imaging Warehouse   Process Supplies   RH Designs   Second-hand Darkroom Supplies  

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
red filter GoodOldNorm Darkroom 29 11th November 2014 12:13 AM
LPL C7700 uneven illumination Stan160 Darkroom 4 25th June 2012 07:53 AM
CLS 35 Colorhead Illumination iainkendall Darkroom 5 30th May 2012 12:16 PM
Nikon F3 sticky meter illumination button Phil Cameras - small format 2 9th April 2012 07:20 PM
ND filter help please jonsparkes Filters 9 18th June 2010 12:15 AM


All times are GMT. The time now is 06:29 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.