I read a few times that the in body shake reduction is less effective for longer focal lengths. I own an old Tokina-ATX 400mm AF lens and a K10D and wondered how effective it would be. So I did a quick test, three hand held shots at 1/15s, ie 5 stops below 1/600s.
Result: good, moderate, decent
and with SR off: bad, bad, bad
Conclusions, even with my old trusty K10D a very decent result!
First the three SR images, followed by 3 without SR:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUL5ZMapeUUbOlZkQvph64Z85WmZ3oXVlS93ffkZ2Mq_WTMVDa0KVmKzQUDmLl-aaoUcFFlZyQUG5zM9eGVXC3pni1ds3ghPjIA3JgGeyfvJgr2px1VsfI4j4ogsD1ZV3hRQjEkKwUI9Q/s400/IMGP5335rt.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgN_ZxKWsIhnelHYOBduH18bvaoLp_U5wFtEebuN5WkutRqGgZEIyUFbH8W7j14dL90P_F_CalEqRGGRRWfcYI47FLJuf4nrfOfJeiXvnTedYgypeLAn1CxTS0xak2HrQdc-TficE4xphc/s400/IMGP5336rt.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_xTKtZGCEjzSdXgP5U026iaFl609dOW75sC8xl_9Jd9HGO71ndytADqxq1uX0ecWYogSSROKyU9ZXUheF6_3hJmOU-eS1VtbX43gaOQX2Ey-BBOmWY8OUsavOQa8wQEmmqAmjWXTN1PU/s400/IMGP5337rt.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZk7kwU4ockQwMFWbuTgz1TcY5uxS130dOgtpcuywb7JbUJ5TT97x_v6CKhY__5VO1e5kaaXoWfMzi1bOffF27_jXAA37willkIcPLGIgiS_t6dWOGEQWebeTKUXo1kAzc04X4j2JNXAk/s400/IMGP5340rt.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhn4HV9sKUc1GxR66mdQccodrIjC8tJqZDw1XG0GSQxMmWzFy6XK7p9_5WBJQdJt_YTvVG05NuUAgvn2JkIkbR523MnFQQJN2YmTJsf19faYD0GcEjR6SEiA16rY6ZE24W0Xvehpv2H04k/s400/IMGP5339rt.jpg)