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Compatible Canon EOS 90D Lenses

90D With EF-S 18-135mm Lens

90D With EF-S 18-135mm Lens

"Will the 90D take an EF 100-400mm f/4.5-5.6L is II USM Lens 100-300 or any L series senses? How about the extender 1.4 or 2.0?"

Thanks for asking about lens compatibility for a Canon 90D. Coincidentally, I'm working on my next post on that specific topic and it will be here shortly: Canon 90D Lenses. The smaller APS-C "crop" 90D size will take both EF and EF-S lenses.

Canon 90D and 100-400 f/4.5-5.6L IS II USM

Yes, the 100-400mm f/4.5-5.6L is II USM Lens is a good fit for the 90D, giving you an equivalent angle of view as if you are shooting with a powerful 160-640mm lens. The photo below shows the Canon EF 100-400 L f/4.5-5.6 IS II USM mounted on my Canon 90D.

Canon 90D with 100-400 Lens

It's the exact same combination I use when I'm photographing birds and distant wildlife. The only drawback is that your autofocusing is limited to just the center spot if you add in the 1.4X Tele Extender which you also asked about.

Canon 90D and Canon EF 100-300mm f/5.6L

Yes, it will fit. This is a much more affordable choice than the 100-400. It's a lot older and a little slower but is a great beginner lens for wildlife, bird, and sports photography. As mentioned the 1.4 (and 2.0) tele extender will fit on APS-C crop cameras like the 90D, but you won't be able to attach EF-S lenses to the extender.

All Canon "L" lenses are the larger EF lens size and will fit onto both crop and full frame Canon bodies. Thanks for visiting my site. I hope it was helpful!

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Canon 1.4 Extender With
Canon 90D and 100-400mm II Lens

by Harvey Lindenbaum
(Southport NC)

Canon 1.4X Extender

Canon 1.4X Extender

"Can I successfully use a 1.4 extender with an EOS 90D and a 100-400MM Mark 2 lens?"

Thanks for asking about the Canon 1.4X Extender compatibility with the 90D and EF 100-400mmmm II Lens. The quick answer is yes. The Extender will fit with the 90D and 100-400 Mark II lens, but there's more to the story.

Canon 90D + 1.4X Extender + 100-400mm II Lens
Canon 90D + 1.4X Extender + 100-400mm II Lens

Coincidentally, I researched this exact same question at the end of 2019 and into the earlier part of this year, and coincidentally have purchased the Canon 1.4X Extender II, the Canon EOS 90D, and the Canon EF 100-400mm f/4.5-5.6 II all within the last 18 months or so.

This combination will give you the equivalent angle of view of a 224-896mm super zoom. That's a ton of magnification, great for photographing birds, wildlife, and sports from a great distance. As you can see from the photos at the beginning of this post-click on the thumbnail to check sharpness-even without the 1.4X Extender, you can get great photos with the Canon 90D and EF 100-400mm f/4.5-5.6 II lens, with both distant and not so distant subjects.

Auto Focusing compatibility With the Canon Extender

The 1.4x Extender will reduce your effective maximum aperture by 1 f/stop. Many (including Canon) auto-focus systems have limited functionality above f/4.0 and unfortunately the combination of the 100-400mm F/4.5-f/5.6, with the Canon 1.4X Tele-extender and the 90D will only give you the single center focusing spot for auto-focusing.

This limitation is not necessarily a deal breaker if you're shooting stationary subjects. If you're shooting birds in flight or wildlife on the move, the limitation in not being able to expand to a larger focusing area may be a challenge too cumbersome to deal with in my opinion.

Canon 1.4X Extender Sharpness

The second, perhaps bigger issue is the loss in image quality that comes along with using Extenders (often called teleconverters and tele-extenders) I just wrote an article on the sharpness you get while using the Canon Extender 1.4x II that I'm sure you'll find interesting. I did a geeky image quality comparison with and without the Canon Extender and a very sharp 70-200 f/2.8 and was disappointed with the results.

The challenge is that lens image quality can vary slightly from model to model and that means that using a lens with a specific Extender can vary too. The Canon 1.4X Extender version III should be sharper than my version II. Micro Focusing calibration often improves sharpness too.

I like to test my lenses wide open and stopped down 1 or 2 stops, as image quality varies with aperture too. I can tell you that, without a doubt, the Canon 100-400mm II is a very sharp lens, wide open and I really like it a lot, as well as the 90D with its 10 frames per second for capturing action photos.

Harvey, stay tuned because I'll have the article on the exact 90D, 1.4X Extender, and 100-400mm II lens combination you want to know about, published on the Canon Geek within the next few days. Look for it on the Canon Geek Blog

Please let me (and our fellow Canon shooters) know what you decide to do!

Have a blast. Shoot a Canon.

Related 90D Articles

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Canon 90D Features
Is the 90D Any Good?

Comments for Canon 1.4 Extender With
Canon 90D and 100-400mm II Lens

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1.4x extender
by: StephenBP

StephenBP: Really just to agree with you. I have given up using the extender on my 100-400 mk 2 lens. As a bird photographer I find that the loss of sharpness is irritating I sold my 2x extender because it was even worse.
I have been extremely lucky to get a 600mm mk ii and the extender works beautifully. I want my 2x back now!!

Bruce: Thanks for your thoughts, StephenBP. Glad you found a winning combo for your 1.4X Extender. I'm curious as to why it would work better with a 600mm Mk II.

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Canon 70-200 f/2.8 IS III vs Similar f/4.0 for Canon 90d (or any crop sensor)

by Miles Hanley
(Columbia, SC)

Canon 70-200 f/4 Vs. f/2.8

Canon 70-200 f/4 Vs. f/2.8

"I just purchased the Canon 90d and bought the ef-s 17-55mm f/2.8. I am looking at purchasing the Canon 70-200 f/2.8 is iii and I just read your article on the 70-200mm f/2.8 vs. the f/4.0. You made some compelling arguments for getting the less expensive f/4.0. And this would make sense on a full frame camera. But with crop sensor cameras the crop not affects the focal length but also the minimum and maximum (if not constant) aperture. So the f/2.8 is effectively an f/4/5 and the f/4.0 is effectively f/6.4. Would this make it more sense to purchase the faster lens with a crop sensor camera?"

Hi Miles,

Congrats on choosing the 90D. I am really enjoying mine too, for several reasons! The topic of the comparison of the Canon 70-200 f/4 vs. f/2.8 is a fascinating topic for Canon nerds like me (and perhaps you). My biggest points for choosing the f/4.0 vs. the f/2.8 are price and size. But, I've got to tell you. You can't go wrong with choosing the 70-200mm III.

Effective f-stop on Full Frame vs. 90D crop sensor

Although technically maybe the "effective" f-stop might be different, it's the practical differences that matter. Whether you use am f/4 lens or an f/2.8 lens set on f/4 the same amount of light will enter your 90D all the same. If you can afford the f/2.8, you're going to love it. I've been shooting the majority of portraits I shoot with the 70-200mm f/2.8 I for many years.

Also, How many times will you be shooting either of the 70-200mm lenses at the smallest apertures? The amount of benefit of having that extra full f/stop (twice as much) and the added background blur (bokeh) are the 2 factors that make the most difference in your shooting.

I encourage you not to get too wrapped up in minor technical differences-I'm guilty of this frequently-and focus on your technique and creativity.

Miles, Thanks for your question about choosing a Canon 70-200mm f/4.0 versus the f/2.8 version. I think it's just a matter of the situations you're in, both financially as well as the situations you photograph.

I look forward to hearing back from you to see whether you select the 70-200 f/2.8 III or the f/4.0.

Canon 70-200 f/2.8
Canon 70-200 f/4.0

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Author Bruce Lovelace
Bruce Lovelace Signature

Bruce Lovelace is the publisher of Canon Camera Geek. Read more about him on the About Page. He also publishes how to articles and camera gear reviews at the Photography Tips website.

View some of Bruce's photos on Instagram  and Flickr  Join the tribe of followers on YouTube. Bruce also runs photo workshops and provides 1 on 1 digital photography coaching.

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