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

Started 4 months ago | Discussions thread
Trevor G
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Re: Please use better experiment protocol - please give further details why...
In reply to Younes B, 4 months ago

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.

+1

Test is not conclusive of decentering.

What do you think it shows?

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Trevor G
Silkypix tutorials at: http://photo.computerwyse.com

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