I'm using a Canon 350D and up to 3 weeks ago, I was using a Canon 75-300 IS USM lens. I've since changed to a Sigma 50-500 EX APO DG which is much sharper, especially over 200mm. My problem is, my processing workflow for the 75-300, particularly with regards to sharpening, worked really well. However, since swapping lenses, I can't get to grips with sharpening. For some reason, the way I'm used to sharpening my images just doesn't seem to work with this lens and all I end up with is soft or over-sharpened, very jagged images. Its rather frustrating since the images are pretty sharp straight from the camera, but I just can't seem to process them, they look worse afterwards!
This is one example. I took this on a very sunny morning in Manchester yesterday. All I've done is centre and resize the image. No sharpening has been applied. I did try but you don't want to see the results!
In my workflow, before resizing, I'd normally run one or two passes of USM at 50%, 0.2, 0, then resize and apply once more if requred. This worked really well with the 75-300, but its useless with the 50-500. I didn't think a change of lens would make much difference!
Any other technique is alien to me as this is what I've been used to doing for 2 years, and its always been fine. Any tips on how to sharpen up this one? I've searched the forum and read a few things, but didn't really understand what the process was.
Thanks in advance,