I occasionally like to make use of a longer tele lens than the Nikkor 180mm f2.8. So, I bought a Pentacon 300mm f4 which weighs a ton - to capture the occasional bird or other wildlife shot. This came in at under AUD200 so was not a big investment. And I figured I would also take for travel shoots where I had the car available for transport as there’s no way I’m going to carry this with the other lenses in a camera bag. I have previously used both Canon and Nikon teles upto 400mm as well as the 300mm equivalent Olympus. I have to say I love the images this lens produces. That wonderfully soft and somehow still quite sharp result together with beautiful colour rendering makes the images from this lens worth the exercise.