Simple micro focus check process

Started Dec 10, 2011 | Discussions thread
RicksAstro Veteran Member • Posts: 3,647
Re: 50 times the focal length ?

ZeevK wrote:

I use my 70-210/4 mostly for portraits at about 1.5 meters @ 200mm. 200x50=10,000mm=10m this is far from my shooting distance for portraits... not to speak about 100mm MACRO...

I prefer to do the micro-adjust procedure at the most common shooting distance of the specific lens.

And that's exactly what you should do. The other guidelines are just estimates for general use.

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