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<blockquote data-quote="Geoffc" data-source="post: 116002" data-attributes="member: 8705">I recently spent ages chasing the fine tune using this method on my D800 with a variety of lenses. In the end I bought the Focal software ( <a href="http://www.reikan.co.uk/focal/mbp45/" target="_blank">http://www.reikan.co.uk/focal/mbp45/</a> ). I found the ruler / printed ruler method to be rather subjective. The Focal software is purely objective. It was £45 which is not cheap but it's made me happy with a £2000 camera body and a lot of lenses, so on balance I'm happy.If you do the ruler method don't use live view to compose and focus as it uses a different AF method. I made this mistake on the first 250 tests <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />The other thing I learned is things will change at different apertures (not just DOF) and distance to subject. It drove me nuts!!</blockquote>

[QUOTE="Geoffc, post: 116002, member: 8705"] I recently spent ages chasing the fine tune using this method on my D800 with a variety of lenses. In the end I bought the Focal software ( [url]http://www.reikan.co.uk/focal/mbp45/[/url] ). I found the ruler / printed ruler method to be rather subjective. The Focal software is purely objective. It was £45 which is not cheap but it's made me happy with a £2000 camera body and a lot of lenses, so on balance I'm happy. If you do the ruler method don't use live view to compose and focus as it uses a different AF method. I made this mistake on the first 250 tests :-) The other thing I learned is things will change at different apertures (not just DOF) and distance to subject. It drove me nuts!! [/QUOTE]

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