Johan Biilmann
De-yellowing a Takumar
My newly acquired Pentax 6X7 Takumar 105/2.4. It has the infamous yellow/brown color cast in the rear lens element.
I am currently de-yellowing it under a Jansjö LED lamp from Ikea. Here's a photo of the progress so far: Before treatment, after 38 and 86 hours.
The method seems to work, but obviously it's going to take quite some time.
I photographed the lens in natural light, and since the daylight varies with the weather there are minor differences in the white balance. I've tried to compensate by white balancing the background in the editing.
De-yellowing a Takumar
My newly acquired Pentax 6X7 Takumar 105/2.4. It has the infamous yellow/brown color cast in the rear lens element.
I am currently de-yellowing it under a Jansjö LED lamp from Ikea. Here's a photo of the progress so far: Before treatment, after 38 and 86 hours.
The method seems to work, but obviously it's going to take quite some time.
I photographed the lens in natural light, and since the daylight varies with the weather there are minor differences in the white balance. I've tried to compensate by white balancing the background in the editing.