fine tuning auto focus

[chico]

Hi,first post.has anyone used the dot tune method to adjust focus fine tune? I don't want to purchase software if I don't have to.I,m having trouble focusing with my tamron 70-200 F2.8.thanks, Troy

 

[Dave_W]

Just so I'm on the same page with you, what is the "dot tune" method?

 

[chico]

It's a method I found on youtube using the focus light in the camera to find the range of good adjustment and then set the camera in the middle of that range.
http://www.youtube.com/watch?v=7zE50jCUPhM

 

[eurotrash]

​I've done the 45 degree angle thing and dot tune before. Dot tune didn't work on my 16-85, it definitely back focused constantly. For all primes it did work wonders however. I'll continue to use dot tune because it's A: easier, B: takes less time, C: accurate enough for what you need to shoot.

However, the less time you spend worrying about focus "issues", the more you can spend actually being a photographer.

 

[Geoffc]

I spent a load of time chasing the AF on my D800. I found anything looking through the viewfinder became subjective. In the end I bought the Reiken Focal software. It seems to work well if you set it up and light the target properly.