I recently bought a new lens: a Tokina f/8 400mm reflex. It is a wonderful lens for its small form and cost (less than 10% what a Nikon 400mm ‘normal’ telephoto lens lists for). There are some trade offs for any reflex style lens: you get a fixed aperture and some artifacts from the front reflex mirror. I took it on the Port Townsend – Coupville ferry run and while on Whidbey Island, I walked around Fort Casey.
One of the characteristics of long telephoto lenses is relatively shallow depth of field. You can use it to your advantage, but it can be a challenge getting your image to work out. In the image below, I was focused on getting the kite in the image … which I did successfully. But the kite is just about all that’s in focus.