Hi, yes I simply plugged-in the G4 bulb as it's the same fitting that the former 100W Halogen has - I shortened the 'prongs' a tiny bit to get it to sit nicely and off it went - 4 bulbs for £6 and I'm still using the first of the 4 I bought!
This refers to my lamp-housing which is the 100Z model that is intended to hold a 100W halogen. I found the 100W much too bright (not to mention HOT) and didn't like turning it down to yellows to use it! I fitted a cheap 12V controller, an LED dimmable transformer and an inline ('torpedo') switch just before the input of the controller, which I simply stuck to the side of the Orthoplan as seen in the below image using double-sided tape. The massive Leitz power supply is now in a box, not taking up desk space.
Of course with this rig I'm able to fit, and have done but removed as I prefer the halogen's 'warm white' + blue filter at lamp-house end, an LED bulb if desired.
No giant power-supply needed here!
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This rig can take LED, halogen or whatever you prefer, all these bulb types worked perfectly,
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Here's an LED fitted straight in,
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These are the 40/70W halogens I now use - £6 for 4 bulbs and I'm still using the first one - I always leave it at 12V and use a variable ND-filter for level (as used on cameras) and the usual blue filter at the lamp-house filter-holder end (the big ones),
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with a nice big blue filter,
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This rig works beautifully for me with all abjectives including the x100 oil, and plenty of power for the camera too!
If you need to know more just let me know.