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RF35mm f/1.8 IS STM MACRO AF performance.

Started 3 months ago | Discussions thread
OP bharathmsk Regular Member • Posts: 190
Re: RF35mm f/1.8 IS STM MACRO AF and Resolution performance.

Thanks all.

@Martin_99, following your link to opticallimits, I read through the review and I had some hope instilled in me. I repeated the resolution chart experiments (attached pictures, I have concatenated images, use Dpreview loupe).

To my dismay, the lens gets sharpest at f/11-f/16! And the resolution drop from f/1.8 -> f/2.8, f/4 and the recovery thereafter at around f/5.6 is also very clear. These results were highly reproducible.

So the lens is poorer than I had originally thought (I should have taken the time to sweep through the entire aperture range). At this point, I certainly feel like this lens is a lemon. And the poor optical performance could have lead to a poor AF performance like the opticallimits review indicate. I think I should contact the manufacturer. If you all have other insights to add, please, I would greatly appreciate them!

To answer your question @Martin_99 on the AF settings, when I photograph family, these are left at eye tracking & servo. For these resolution chart pictures, they were left at single point AF on the target.

RF 35mm f/1.8 IS STM MACRO

Thank you for your help and support!

 bharathmsk's gear list:bharathmsk's gear list
Canon EOS 550D Olympus OM-D E-M10 III Canon EOS R Canon EF-S 55-250mm f/4-5.6 IS Canon EF-S 18-55mm f/3.5-5.6 IS +9 more
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