RJ Aznir (01.17.20, 5:42 AM): On you blog you wrote "- Tamron 18-400 (*We have seen both good and bad images with it, seems like a good copy will work) ". What does "Good copy" mean? Thank you.

Priyank Dhami (01.07.20, 12:23 PM): What about 300mm f4 lens and its resolving power because it's not mentioned so. Does it work good with 90d. Thanks from India Priyank

Stephan (01.05.20, 4:01 PM): Any info about the canon ef-s 17-55 f2.8 ?

Michael DiDomenico (01.05.20, 4:52 AM): I have the latest 18-135mm and also the 15-85. I hope the 18-135 is a good fit, since they offer this with the camera.

Rhdjr (01.04.20, 3:45 PM): Tamron 18 -270 does anyone have any experience

jackie (12.27.19, 11:28 PM): I am using 600MM f4 ii and 2*TC III, not sure if this will work for 90D.

Jacobo Oduber (12.15.19, 5:51 PM): using a Tamron 18-400 on the Canon 90D as my only lens! So far looking pictures are coming out fine and using both RAW and JPG 6960 × 4640. Looking good sofar using the Tamron.

Birney Dayton (12.14.19, 10:12 PM): Canon EF-s 15-85 seems to work pretty well and the best of the EF-s zooms. The Sigma 17-50 is good in the center, but fuzzy edges so fine for some work and not other.

Fanis (12.03.19, 3:13 AM): Many many thanks for this list. Some questions: 1) The ones that are not commented are working as expected or are the recommended ones from canon? 2) what about the "holy trinity's" EF 16-35mm f/2.8 III USM ? I would expect that to work :( 3) Canon 18-135 2.3-5.6 (Confirmed) - Good, Not Stellar ??? Do you mean the EF-S 18-135mm f/3.5-5.6 IS USM ? (the base kit of 90d one) thank you a lot! Keep up the amazing work!

Shaun Cain (11.26.19, 7:20 PM): Canon 50mm 1.8 stm is great Canon efs 18-55 & 55-250 looks good Tokina 11-20 f2.8 is a massive fail Canon efs 10-22 is decent Tamron 24-70 f2.8had 2 lenses and 1 was good other I think was just a bad lens that froze up several times and over 1300 pictures were crap Canon ef 75-300 was too soft Canon 70-200 f2.8 is II was good

Varun Deore (11.24.19, 12:13 PM): What about Sigma 150-600 COntemporary Lens. I am planning to replace my current Canon 750D with either 80D or 90D. Which one will give sharper images with Sigma 150-600?

Paul Becker (11.03.19, 10:16 AM): What about the Sigma 17-50mm f/2.8 EX DC OS HSM?

Lau Bjerno (11.01.19, 8:56 PM): I just took a few pictures with my Canon EF-S 35mm f/2.8 Macro IS STM, and I’ve no complaints as to the sharpness.

Bruce King (10.29.19, 3:07 AM): The Canon 600mm mk3 is a definite for the 90D

Lynn (10.28.19, 4:06 PM): Any info on the Tamron 18-400? Many thanks for your work!

Susan Reed (10.27.19, 11:06 AM): I will add I got good results from Canon EF-S 60mm f/2.8 Macro USM Fixed Lens on a tripod. Haven't hand held it yet.