Thomas safe light

Sky

A
Sky

  • 0
  • 0
  • 73
.

A
.

  • 5
  • 1
  • 293
Promethea Moth

D
Promethea Moth

  • 3
  • 1
  • 210
On The Nest

D
On The Nest

  • 3
  • 1
  • 205

Recent Classifieds

Forum statistics

Threads
189,647
Messages
2,644,787
Members
97,322
Latest member
JohnEsco
Recent bookmarks
0

Jorge

Member
Joined
Sep 6, 2002
Messages
4,515
Format
Large Format
Hi all, I got a thomas safe light through e bay and a couple of tubes, it appeared to be a good deal. So I got it today and pluged it and the light sure does not seem that bright. Heck my Zone VI LED is far brighter than the Thomas duplex. Did I get gipped? are the bulbs old and need to be replaced? I have always heard how much brighter these lights are and I am confused.
unsure.gif
 

bmac

Member
Joined
Sep 30, 2002
Messages
2,154
Location
San Jose, CA
Format
Multi Format
Are you talking about the big hanging lights with the two doors? Amber lights? If so, there is someting wrong with it. The ones we used when I was in school were so bright we had to keep them 99% closed. This was in a 30X30' darkroom with 20 enlargers.
 
OP
OP

Jorge

Member
Joined
Sep 6, 2002
Messages
4,515
Format
Large Format
ah heck, I guess the bulbs are no good anymore. Darn!
 

Sean

Admin
Admin
Joined
Aug 29, 2002
Messages
12,327
Location
New Zealand
Format
Multi Format
Yeah, if it's a thomas duplex safelight it should be extremely bright. I kept the doors on mine almost closed. I think it takes quite a while for it to light up. Leave it on for 15 minutes then see how bright it is. It should be like a small sun at that point
smile.gif
 
OP
OP

Jorge

Member
Joined
Sep 6, 2002
Messages
4,515
Format
Large Format
w00t.gif
Whooohooo....thanks Sean, I was too impatient, I did as you recommended and it sure was bright!
 

Sean

Admin
Admin
Joined
Aug 29, 2002
Messages
12,327
Location
New Zealand
Format
Multi Format
</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Jorge @ Oct 15 2002, 04:19 PM)</td></tr><tr><td id='QUOTE'>
w00t.gif
Whooohooo....thanks Sean, I was too impatient, I did as you recommended and it sure was bright!</td></tr></table><span id='postcolor'>
Cool! keep an eye on the gels, if they fade enough you might get some fogging... glad it's working
smile.gif
 

ann

Subscriber
Joined
Sep 10, 2002
Messages
3,337
Format
35mm
Be careful not to turn off by mistake. The unit needs to cool down before the light will come back up. Someone every session does this no matter what instruction is given to each class.
 
OP
OP

Jorge

Member
Joined
Sep 6, 2002
Messages
4,515
Format
Large Format
</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (ann @ Oct 15 2002, 09:24 PM)</td></tr><tr><td id='QUOTE'>Be careful not to turn off by mistake. The unit needs to cool down before the light will come back up. Someone every session does this no matter what instruction is given to each class.</td></tr></table><span id='postcolor'>
I bet it drives you nuts!.....Thanks Ann!
 

steve

Member
Joined
Sep 12, 2002
Messages
235
"Cool! keep an eye on the gels, if they fade enough you might get some fogging... glad it's working"

The Thomas Duplex saftelight does not have "gels." There are two sets of glass filters. For black and white paper use, no filters are necessary as it uses sodium vapor tubes. The spectral transmission is so narrow that it is in and of itself, within the correct wavelength for the "safe" spectral area of the paper. Secondly, the safelight is made to be reflected from the ceiling and walls which gives a greater overall perceived illumination level, but results in much less intense light reaching the paper because of the light falloff (1/d^2).

The second set of filters is for use with some color papers with the filter doors totally closed on the safelight, and the second filters stacked on top of the first ones. I have had one in my darkroom since 1982. I find it almost too brigh,t and use it with the doors only open about 3/4-inch - this is in a darkroom that is 10ft x 13ft.
 
OP
OP

Jorge

Member
Joined
Sep 6, 2002
Messages
4,515
Format
Large Format
Since I just got this thing I dont know much about them but I did take the filters apart and they are a piece of thin paper like material sandwiched between to clear glasses. It seems to me they would fade. But heck if you had yours since 1982 I guess mine would do fine. Thanks Steve.
 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom