Can Pentax make A Decent Lens? Ricoh have not fixed QC issues...

Started May 18, 2014 | Discussions thread
OP Trevor G Veteran Member • Posts: 6,576
Re: Please use better experiment protocol - please give further details why...

Younes B wrote:

jf_tea wrote:

shallow DOF at f/1.8

That's exactly where you test a lens.

It should be sharp on both sides wide open, not just on one side.

One side indicates decentring, or skew I am now calling it.

subject distance at left vs. right is significantly different.

Please use better experiment protocol.


Test is not conclusive of decentering.

What do you think it shows?

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Trevor G
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