So, I finally decided to pull the trigger and get myself a 400mm lens. Been thinking about it for ages, wanting that extra reach, you know? Especially for wildlife stuff I sometimes try to shoot down by the river.

When the box arrived, the first thing I noticed was the sheer size and weight. It wasn’t messing around. Definitely heavier than my usual walk-around lens. Holding it felt substantial, like I was really holding a serious piece of gear. Bolted it onto my camera body straight away.
First Steps Out
Took it out the very next morning. Headed to that spot where the herons sometimes hang out. Finding the bird in the viewfinder was the first challenge. At 400mm, everything is magnified so much, the slightest movement of my hands made the frame jump all over the place. It was like trying to look through a telescope handheld.
My first few shots? A blurry mess. Seriously. Even on a bright day, keeping it steady was tough. I quickly realized a few things:
- Shutter speed needed to be way higher than I was used to.
- Leaning on something, like a fence post or even just sitting down and bracing my elbows on my knees, helped a lot.
- A tripod or monopod wasn’t just a suggestion; it felt almost necessary for consistently sharp shots, especially if the light wasn’t perfect.
Getting the Hang of It
Spent a good couple of hours just practicing. Focused on tracking moving things – birds flying by, even cars in the distance. It forced me to be smoother with my movements. I started anticipating where the subject would go, panning along with it. You really gotta be deliberate with a long lens like this.
The autofocus took some getting used to as well. Sometimes it hunted a bit, especially with busy backgrounds. Had to learn to help it out, maybe pre-focusing near where I expected the action to be. But when it locked on? Wow. The detail you can pull out from far away is pretty amazing.

Managed to get a decent shot of a squirrel halfway up a tree across the path. Couldn’t believe how close it looked, could almost see the whiskers. That was the moment I thought, “Okay, this is why people use these things.”
Where It Shines (and Doesn’t)
Since then, I’ve used it more specifically.
- Wildlife: Absolutely killer for birds, deer, anything you can’t get close to. It lets you fill the frame without spooking the animal.
- Sports: Tried it at a local kids’ soccer game (from the sidelines, obviously). Great for isolating players across the field.
- Moon shots: Pretty cool for getting details on the moon surface, way better than anything else I own.
It’s definitely not a lens I carry everywhere. It’s bulky, heavy, and pretty specialized. Taking it for a casual walk around town? Nope. It stays home unless I have a specific reason to bring it. It really makes you plan your shooting.
Final Thoughts
So yeah, the 400mm. It was a learning curve, for sure. Took practice to handle the weight, the stability issues, the tight field of view. But the ability to reach out and grab those distant subjects is something else. It opened up shots I just couldn’t get before. It’s a tool, a specific one, and I had to learn how to use it properly. Still learning, honestly. But it’s been a rewarding process, getting those shots that were previously just out of reach. Definitely makes you work for it, but worth it when you nail one.