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EOS RP front focus with EF lenses - Please CANON add MFA to RP!

Started Dec 23, 2019 | Discussions thread
shleed Contributing Member • Posts: 757
Re: EOS RP front focus with EF lenses - Please CANON add MFA to RP!
1

CsvPhoto wrote:

Lukens wrote:

Hi.
Did solve ur problem?

Ive noticed same problem with my Eos R. Same lenses 85 1.8 usm and 50 usm plus converter Canon one. These are not L lenses .

Whats funny about this.

When I’m shooting in vertical position (trigger on top) and I’m trying get sharp face on object. Front focus on both lenses.

Now I flip camera to horizontal position everything is ok.

And another thing. I flip camera to vertical position but trigger this time on bottom. Face is sharp no front focus.

Cant understand that.

It causing problem because in vertical position trigger at bottom I can’t use grip because it’s very uncomfortable.

Anyone got similar issues?

I tested on tripod, hands about 100pic done plus 4 photo sessions. I thought it’s my fault, shaking hands. Low light etc. I went through everything.

Problem still exists.

I was not found solution.

I has front focus both horizontal and vertical position with ef 50 1.4 and 85 1.8.

I suggest you to do a controlled focus test from tripod, 50x focal distance (50 -> 2.5m, 85- > 4m), timer, test chart.

If you got front focus in test, then its not user error.

Again, the chart was made for DSLRs with cross-type AF points. The EOS R only has vertical AF points, meaning it won't do well with anything that has a lot of horizontal lines. Any focus issue is purely due to this limitation - Canon doesn't have any PDAF method to have cross-type AF points right on the sensor.

More info on this:

https://www.imaging-resource.com/news/2018/09/15/canon-eos-r-qa-with-the-canon-engineers

(This is also why in certain cases, the AF behaves differently on portrait orientation)

 shleed's gear list:shleed's gear list
Canon EOS R Canon EF 24-85mm f/3.5-4.5 USM Canon EF 100mm F2.8L Macro IS USM Irix 11mm F4 +3 more
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