Reviewing the Canon 100-400mm f/4.5-5.6 ii IS in the Galapagos

The last time I was in the Galapagos Islands, I felt like I was missing about 100mm of lens. And, sure, you get really close to the wildlife on the islands, and probably could get cool images with a smartphone. But, to get the style of imagery I wanted, I just needed a little more lens. So, I gave Canon Canada a shout and asked if they’d lend me the new-ish 100-400mm f/4.5-5.6 IS version II lens that so many photographers have been raving about lately. They were kind enough to oblige. I’m glad they did, because my favourite telephoto photos from the Galapagos Islands were all shot on the lens. This is my review of the Canon 100-400mm f/4.5-5.6 IS lens.

Canon 100-400mm f/4.5-5.6 IS Specs

Before I get into the review itself, here’s a quick look at some of the specs of the lens.

  • Lens Construction: 21 elements in 16 groups
  • Weight: 1.64kg
  • Length: 19.3cm
  • Width: 9.4cm
  • Closest Focusing Distance: 98cm
  • Filter Thread: 77mm
North Seymour Island, Galapagos Islands

Headshot of a Blue-footed Booby.

What I Loved About the Lens

There’s a lot to love about this lens. Usually, I’m fairly adamant about only buying fast glass, but I think I’ll make an exception for this one. There are a couple factors that help me come to that conclusion. The first is that the image stabilization is amazing. In the video above, I share a clip of the IS on and one of the IS off. The difference is noticable. Usually, I say that you need to shoot shutter speeds of 1 over the focal length you’re shooting. Thus, if you’re at 400mm you should be shooting 1/400seconds. However, I was getting away with shooting 1/200 and 1/150 and still getting really sharp images. The real beauty of the IS is for video people, who will actually be able to shoot this lens hand held.

The other thing I really loved about the lens was the minimum focusing distance. I was able to get really close to my subjects and get photos that had a really nice and shallow depth of field. In some cases, the images almost look like they have a macro quality. I really wish my 70-200mm could get that close.

Finally, the weight of the lens was definitely manageable. I didn’t feel like it was dragging me down. In fact, I didn’t notice much of a weight difference from dragging around my 70-200mm f/2.8. And, it was light enough that I could handhold it if I needed.

Santa Fe Island, Galapagos Islands

The colours on these crabs were amazing!!!

Things that Took Getting Used To

There was really only one thing I needed to get used to with this lens, and that was that it doesn’t stay focused when zooming. Thus, if I have a subject in focus, decide I want to zoom tighter, I have to re-focus. It’s not really a big deal at all, especially if you’re back-button focusing, but did take me a bit of time to get used to. I think that video shooters might have a hard time with that.

Gardner Bay, Galapagos Islands

A sea lion yawns on Gardner Bay.

What about the Bokeh?

A lot of people are concerned that they’re not going to get great bokeh from a lens that shoots f/4.5-5.6, but, believe me, you can still get that nice round bokeh at those apertures. In fact, I was surprised how nice and buttery the bokeh looked even shooting at higher apertures like f/8. Obviously, you’re not going to get that crazy bokeh like you would on a 50mm f/1.2 of something like that, but you definitely still get it.

Santa Fe Island, Galapagos Islands

A Land Iguana in the colourful grasses.

Is the Canon 100-400mm f/4.5-5.6 Sharp?

Yes. And, to be honest, I think it might be sharper than my 70-200mm f/2.8 (which, to be fair is the first version and not the newer one). I had very very few images that I had to throw away because the lens wasn’t sharp. In fact, I can’t think of a single time. I didn’t have to play around with micro-adjustments either, it was just sharp. I am a bit of a stickler for sharpness because I do sell images on micro-stocks which need to be tack sharp, and I’m happy with how they came out.

Suarez Point, Galapagos Islands

Portrait of a Marine Iguana. Love how close I can get with the 100-400mm lens!

Do I need f/2.8-4?

Obviously, f/2.8 or f/4 would be nice. However, there wasn’t a single time shooting that I was like “damn, I wish I had one more stop.” In fact, since you’re so close to the animals on the Galapagos Islands, there are rarely times you could even shoot f/4 if you had it. The depth of field would just be too narrow. I found myself shooting mostly between f/5.6 and f/8. The sweet spot for sharpness on the lens seemed to be f/6.3.

Now, having said that, there are situations that photographers are going to want faster glass. However, for me I can’t shell out the money for the incredible 200-400mm f/4, and like the versatility of the 10—400mm over a prime like the 400mm f/5.6. So, this lens suits my needs fine.

Santa Cruz Island, Galapagos Islands

Such beautiful dinosaurs.

Some More Image Examples

Here are a couple more images shot on the #feelagaininecuador project with that Canon 100-400mm f/4.5-5.6 IS lens.

North Seymour Island, Galapagos Islands

Love the textures of this image.

North Seymour Island, Galapagos Islands

A frigate bird chick. What a tennis ball!

Suarez Point, Galapagos Islands

A group of Albatross on the flats of Suarez Point.

Suarez Point, Galapagos Islands

Nazca Booby pair on the cliffs.

Suarez Point, Galapagos Islands

A couple marine iguana warming up in the sun.

Santa Cruz Island, Galapagos Islands

“Do you mind? I’m eating!!”

North Seymour Island, Galapagos Islands

A male frigate bird calling down a potential female mate.

North Seymour Island, Galapagos Islands

Baby booby calling out to mama.

North Seymour Island, Galapagos Islands

A blue-footed booby doing its dance.

What’s Next on the Travel Photography Blog

I’m off to Cuba with Intrepid Travel! I’m stoked for Cuba, as you can probably imagine.  I’ll be there for 3 weeks in total and visiting about a half dozen different destinations.

Author: Brendan van Son

Author: I am a travel writer and photographer from Alberta, Canada. Over my years as a travel photographer, I have visited 6 of the 7 continents and more countries than I have any desire to count. If you want to improve your skills, be sure to check out my travel photography channel on Youtube . Also, check out my profile on . to learn a little bit more about me and my work.

Share This Post On


  1. Brendan, great honest video. I am looking to buy this this lens for my Cannon 7D MkII camera and you have convinced me that this lens will be almost perfect for my needs, something I really needed to know before forking out £1800 Thanks

    Post a Reply
    • Yup, really loved the lens and the AF of the 7DMII will be amazing on this glass.
      But, man, 1800 pounds? Yikes. I think it’s like 1400pounds in NYC. Almost worth a flight there to pick one up. haha

      Post a Reply

Submit a Comment

Your email address will not be published. Required fields are marked *

Real Time Analytics
Want to improve your photography? Subscribe to my Travel Photography YouTube Channel! You will not regret it!

Get a Free Copy of Vagabundo Magazine

Sign up for my newsletter and get a free copy of Vagabundo Magazine. You'll also get information regarding future travel photography workshops. Right now, we're booking for PERU!