Asahi Super-Takumar 50mm 1.4 UV Treatment
This photo blog entry covers the UV treatment of an Asahi Super-Takumar 1.4 50mm camera lens. Day by day photos and a final comparison will be included.
This article is going to cover a time lapse of the UV treatment I’m applying to my yellowed Super-Takumar F1.4 50mm lens. The radioactive coating on the glass has decayed over time giving the photos I take with it a yellow tinge. I’ve also notice it’s considerably darker at F1.4 than my other 50mm at F1.7. UV treatment should make it much brighter. Estimations I’ve read online say it could take a week to two of leaving the lens under UV light. I’ve got a 60 watt black light bulb on it currently. You can see it in the photo above and a photo of the lens for each day of its progression. The lens is aimed at a 500W CFL bulb. I’m letting the bulb warm up about 10 mins before photos and taking them all at 1/125, F16, ISO 100 using the ‘flash’ white balance setting on my K10D. This is the most ‘neutral’ setting I have when it comes to white balance. I’m just going to be resizing the photos directly from the camera and dumping them onto here for comparison.
I’ll be posting more photos as I continue the treatment. There will also be side by side comparison shots at the end. I’ll most likely pull all of the images together into Photoshop and make a side by side gradient out of them.
Posted by falcoln0014 
January 2010
Post A Comment
