Hin's Photo Corner

Purple Fringing has always been bothering me. When I see a scene with interesting lighting, I always don't remember a thing about CA/purple fringing in the result image. I can't see it coming upon review of the images at the scene. I should have known better. I have various Tamron zooms and though some of them are my favorite, they are not immune to purple fringing and CA. Many people rely on post processing to clean them up. I rather not have them in the first place. I have used both Tamron and Sigma zooms and primes in various focal lengths, I seem to get much less from Sigma. It begs the question why I have more from the Tamron brand. I am planning in a distant future to upgrade my zoom to the latest Tamron 70-200mm f/2.8 and I surely hope it does better than other Tamrons in terms of CA control. And I hope there is better alternative in the Pentax Brand with similar pricing. The Pentax DA* 60-250mm f/4.0 will be ideal but it is out of my comfort zoom for pricing.
For some pictures, I can have my quick fix in turning it into a black and white photograph but i can't do it to all photos as the color in the sunset in the reflection is what I want to capture in the scene.




Related:

• Purple Fringe with Tamron 70-300mm Di LD Macro
  
• Tamron 75-250mm f/3.8-4.5 adaptall-2 104A
• Tamron SP 70-210mm f/3.5 adaptall-2 19AH
• Tamron SP 80-200mm f/2.8 adaptall-2 30A
• Hin's Camera Gear

I try to have a simple write up on how I handle purple fringe (colored fringes along edges on areas of high contrast.) This happens more often on Tamron 70-300 Di LD Macro but it does not stop me from finding the lens dependable as the cost of the lens is so inexpensive and I just learn to work around the problems. In general, I pay more attention to the shots made with this lens

• Avoid backlit area with high contrast
• Use smaller aperture. Use f/8.0 instead of f/5.6 for long end in the zoom
• Use higher iso instead of bigger aperture

And the following picture is sample of purple fringe around the rock area as well as the off focus area with purple color in the bokeh


And without photoshop and other commercial tools, I manage to use the following free software tools:

• XnView
• An free utility for viewing and converting graphic files.
• Accepts Photoshop plugin
• PFree
• A free photoshop purple fringe plugin

Once I get PFree plugin to properly install on my XnView, I can call and execute the plugin on the above picture. I used all the default settings from Pfree and the results come out way better than the original picture, I am happy as a clam for the results

The easiest area to spot the difference is on the rock area. I also have another image tool viewer called Irfanview which works more advanced than XnView and it also accepts photoshop plugins and I will report back how PFree works in Irfanview

Related:

• Tamron 70-300 Di LD Macro f/4.0-5.6
• Tamron 70-300 Di LD Macro Closeup Test Shots
• Tamron 28-75 f/2.8
• Hin's Camera Gear
• Hin's Picasa Demo