Hello to all bros out there
I recently bought Sigma 10-20mm lens. It was said that the aperture range from F4-5.6. However, when i try it on my d40, i could change the F stops to F 22. I test with f22 and f 5.6(as stated) to see if there is any difference, and i found out that there is a difference in the picture composition. Can anyone tell me if it is alright to go above f5.6?