Focus Calibration

EJ,

Based on these comments, what would you suggest as the best method to ensure consistent results and planarity?

Thanks

Bob

[table][tr][td] by E.J. Peiker on Tue Jul 10, 2018 1:55 pm
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[td]E.J. Peiker
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[tr][td][table][tr][td]Of all of the different ways I have focus calibrated thousands of lenses, by far the least reliable method is Focal. The fundamental flaw with it is that there is no way to absolutely guarantee lens/ target planarity. It is also EXTREMELY sensitive to the light source being used and can give you wildly different results between different light sources or if using a mixed light source.
E.J. Peiker   http://www.EJPhoto.com
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I can't read that Bob. You can not paste formatted text...

But - the Lens align II (I prefer the long ruler version) has a sighting system that insures planarity if used properly.

I too use the Lens Align II. I gave up with Focal ages ago.

Sorry about the pasting. Thanks for the LensAlign II

Has anyone tried the “dot tune” method? I’ve never calibrated my af before, and this sounds logical enough. . . .

http://www.fredmiranda.com/forum/topic/1187247/0

ACraig Lipski wrote:Has anyone tried the “dot tune” method?  I’ve never calibrated my af before, and this sounds logical enough. . . .

http://www.fredmiranda.com/forum/topic/1187247/0

Dot Tune sounds great - but it is very unreliable and inconsistent. A few swear by it, but many, many posts in various photo sites come to same conclusion: unreliable and inconsistent. I wish it was a good method because it is relatively easy. 

EGrav wrote:

ACraig Lipski wrote:Has anyone tried the “dot tune” method?  I’ve never calibrated my af before, and this sounds logical enough. . . .

http://www.fredmiranda.com/forum/topic/1187247/0

Dot Tune sounds great - but it is very unreliable and inconsistent. A few swear by it, but many, many posts in various photo sites come to same conclusion: unreliable and inconsistent. I wish it was a good method because it is relatively easy. 

Darn!  But thanks for the reply.

Craig Lipski wrote:Has anyone tried the “dot tune” method?  I’ve never calibrated my af before, and this sounds logical enough. . . .

http://www.fredmiranda.com/forum/topic/1187247/0

That was sorta OK in the 12 megapixel era and not even that good then.  In a high megapixel era it's a fools errand at best.

E.J. Peiker wrote:

Craig Lipski wrote:Has anyone tried the “dot tune” method?  I’ve never calibrated my af before, and this sounds logical enough. . . .

http://www.fredmiranda.com/forum/topic/1187247/0

That was sorta OK in the 12 megapixel era and not even that good then.  In a high megapixel era it's a fools errand at best.

Bummer, but thanks for the info.