Post by John Farrell on Jan 17, 2017 22:18:14 GMT -5
Fifteen years ago, I gave my daughter a camera. Last week, she returned it. It's a Yashica FX-7
I was given this camera in 2002; the leatherette was a mess - the outer layer had peeled off, and the camera frame was cracked, under the lens mount. I glued the frame with superglue, and recovered the camera with leatherette taken from a scrapped Yashica rangefinder camera. After reassembly, I took a series of shots of the weatherboard on my house, to check that the lens was properly aligned.
When I gave my daughter the camera, there was a trace of fungus on the inside of the front lens element. This is part of an optical assembly which appears to be glued together, so cleaning was not possible.
Last week, I saw that the fungus had spread:
So - I've bought a UV torch, and I'm going to see if UV will kill the fungus:
I think it must be sunny in New Zealand at this time of the year. I wonder if sunlight would not provide appreciably more UV rays than a torch.
We've had an awful summer so far, Mickey - and the lens would have to be left outside. Glass absorbs UV, and our windows are double glazed. Because the torch is shining through a glass element, I am losing part of the torch's UV output - the fungus is inside the lens. I think it has had some effect.
The fungus is still there. Perhaps a different UV light would have some effect.
It looks like the fungus has allready damaged the coating.
I have a Miranda 25mm lens which is/was hazy and has/had ight fungus.
I put it under the Ikea Jansö LED light for at least 2 weeks. The haze seems to have disappeared and the image in the viewfinder ist contrasty again. I need to run a film through and compare against the other Miranda lenses.
With the haze the look through view finder was very soft, also the images showed very low contrast and looked a little like "David Hamilton" image. Except that I do not have the models needed for such images :-)