I've had such great success recently with the D800 in natural light (eg hammerhead shots) I thought I'd fit a filter to the back of the Sigma15 and do more. Has anyone noticed any deterioration of sharpness doing this? I know a lot of you use Magic filters. I still have a large stock of Wratten filters from my professional photography days but of course I used them with big cameras not these little DSLRs.
Edited by John Bantin, 08 June 2013 - 05:47 AM.