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

Started May 18, 2014 | Discussions thread
OP Trevor G Veteran Member • Posts: 6,558
Re: Please use better experiment protocol

Petroglyph wrote:

jf_tea wrote:

shallow DOF at f/1.8

subject distance at left vs. right is significantly different.

Please use better experiment protocol.

Good observation.  I'd have to stick up some calibration charts to tell things like that and that is such tedious work I won't do it unless the lens has to be well centred, such as, for landscape or architecture.

Well, a sound mixing desk works well, too.

You just have to fill the frame with rows and columns to get a good idea of where the focus lies (or doesn't in the case of many Pentax lenses I have tried).

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Trevor G
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