shleed
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Contributing Member
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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)