PentaxForums.com - View Single Post - Does UV-filter helps to cut down the purple fringing?

Digitalis · 03-16-2009, 01:02 AM

Originally Posted by Ben_Edict

So my conclusion would be, that a UV filter can reduce colour fringing (which is a sign of chromatic aberration). At the same time, this would improve resolution and contrast.

many years ago I did a test of filters,polarizers and UV filters using an old 50mm f/1.4 Pentax Takumar. And I have never seen an increase in resolution brought about by simply adding a filter, at any f stop. I have certainly seen the opposite where fine resolution was oblitherated by the use of a poor quality filter. I have seen improvements in contrast because of the filters coatings helping reduce flare, that's one of the best ways to improve an older lens,but modern lenses really don't need them. UNLESS you really need to protect your lenses against dust or water. And in those cases only use the best you can get.

03-16-2009, 01:02 AM	#14
Digitalis Loyal Member Location: Adelaide, Austrailia Gallery Photos: 18 Posts: 531	Originally Posted by Ben_Edict So my conclusion would be, that a UV filter can reduce colour fringing (which is a sign of chromatic aberration). At the same time, this would improve resolution and contrast. many years ago I did a test of filters,polarizers and UV filters using an old 50mm f/1.4 Pentax Takumar. And I have never seen an increase in resolution brought about by simply adding a filter, at any f stop. I have certainly seen the opposite where fine resolution was oblitherated by the use of a poor quality filter. I have seen improvements in contrast because of the filters coatings helping reduce flare, that's one of the best ways to improve an older lens,but modern lenses really don't need them. UNLESS you really need to protect your lenses against dust or water. And in those cases only use the best you can get.