Hi all, new to the forum but an experienced Canon SLR and DSLR user. Im still using my trusty Canon EOS7D and EF100-400mm IS lens at airshows around the country but have noticed this last couple of seasons that my images can be soft particulalry at focal lengths above 320mm even when shooting at F8. Both camera body and lens are well looked after but I feel they could do with a mid-life service and tightener - can anyone recommend a place you can take you DSLR and lens for a good check over and recalibration?? Im in the East Midlands UK, but prepared to travel if needs be. Many thanks, Phil
