Pentax film duplicator

There is no mention of how to correct colors when duplicating color negatives. It is NOT simply "invert colors" in postprocessing the digital image.
 
daveleo said:
There is no mention of how to correct colors when duplicating color negatives. It is NOT simply "invert colors" in postprocessing the digital image.
Click to expand...

This is definitely a problem. Some of the ones I did came out fine some I could never get the way I wanted them. Color Perfect (software) did a reasonable job. But here again there were a few that wouldn't correct no matter what.

Black and White was easy to do, slides were a little harder, but with RAW slides worked.
 
You might consider changing your light source, charjohncarter, the spectrum of those cfls is really difficult to deal with. I think a flash would work better, it's clean blue light. You could even filter it more blue (CTB) to compensate more for the orange mask.
 
So basically they've just tried to update this?

auto_bellows_slide_copier.jpg
 
The problem with traditional slide duplicators on macro bellows rails is that they're designed for 135 frames, so if you use smaller sensors, you need to move the lens further away for the same focal length (eg. using 50mm lens on both FF and APS-C). The bellows on the slide holder (which are compressed in this photo and barely visible) generally doesn't stretch out far enough to do this, so people have rigged up their own tubes to make up the distance.

The macro bellows part (the part that is extended in this photo) is also not generally needed and compressed to its shortest length. What you really want for that part is what the Ricoh device has: a geared forwards/backwards movement for the camera body so that you can precisely focus on the slide for a given magnification.

There are also 2 extra lens-camera interfaces on a macro bellows which can introduce planarity issues.

The Ricoh device can also scan up to 6x9 negatives, and can accommodate their 645D camera as the scanning camera. Its rumored price is insanely high, though. I hope that part isn't true.
 
Ranchu said:
You might consider changing your light source, charjohncarter, the spectrum of those cfls is really difficult to deal with. I think a flash would work better, it's clean blue light. You could even filter it more blue (CTB) to compensate more for the orange mask.
Click to expand...


Actually, just used the bulb for B&W. I used radio triggers and electronic flash for color. But believe me, there are more things in heaven and earth, Ranchu, than are dreamt of in our philosophy.

Like light piping, hot spots, and again color correction. I finally gave up on it 3 years ago. But I did do 10,000 copies with that copier.

1479614560_bcf5f6a390.jpg


October 2007, 35mm, Tmax100
 
Beautiful shot. But yes, the best laid schemes of mice and men gang aft agley. I am tempted by these devices, dslrs are so cheap these days.
 
I have a home made rig to use my Oly E-410 as a copy camera. A Vivitar 55mm f2.8 macro in M42 mount is attached to the camera via an adapter. The copy rig is made out of hobby plywood and has a milk white plastic diffuser behind the film slot. I just mount it to a tripod and point the diffuser toward s window. Have not done color negs yet, for now just B&W negatives.
 
Ranchu said:
Beautiful shot. But yes, the best laid schemes of mice and men gang aft agley. I am tempted by these devices, dslrs are so cheap these days.
Click to expand...

Cheap? D800 e is $3000+ D4 is $6000 D200 was $1700 new

After you use one of these, you will not want cheap ever.

I use a copy stand, neg carrier from enlarger, diffusion glass, Vivitar 285, and CP filter set from my first color darkroom.


Just had a thunder storm blast and my house shook like an earthquake. There has to be damage somewhere close. The thunder blasts are continuous for as long as 10 seconds. I never experienced anything like this in 70 years.
 
Well, I hope you're OK. Sounds scary. I could get a new rebel for $400, or an old one for $100. I don't think there's much difference between those and a D800, to be honest.
 
You must log in or register to reply here.
Back
Top Bottom