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Tested all 4 lenses on SL2 back focus

Started Sep 21, 2017 | Discussions thread
brightcolours Forum Pro • Posts: 15,885
NO backfocus

shenlonco wrote:

Well I just did a little test with all my 4 lenses on my New SL2

The photo I focused on the outer most part of the metal hook and then next photo focused under it further back on the rounded curve of the hook and my 1.8 STM has bad back focus the second photo made the face of the hook look clearer and my 2.8 pancake was ok and my 18-55 stm is ok and my 55 - 250 stm has some back focus also.

Here are the photos from my 1.8 , what's one to do if your lens back focuses recompose? use live view?

Thanks

photo one focus on most out edge of hook

photo 2 focus under back further in the circle part the hook goes through and its clear so I have back focus.

You focus on something very small and dark, which does NOT totally cover the AF point of the sensor. The camera sees more contrast in the wall behind and clearly focusses fine on the wall. No back focus at all.

Same in the 2nd shot, the lens/camera combination focusses perfectly on the ring hanging on the hook. No back focus.

Get yourself a bigger target before you want to make conclusions like this?

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