I use my sigma 170-500 with my canon 1000d and to be honest i`m not getting as close as i`d like with my shots , i see others using 400mm lens and they have closer results can anyone explain what i could be doing wrong?
here`s an example
unknown wader by ruffdog64, on Flickr
here`s an example
unknown wader by ruffdog64, on Flickr