what lentgh to paper for micro adj auto focus setting on a zoom lens

[iwols]

hi all at what ldistance do you put the paper with tape measure picture on for adjusting the autofocus settings on a zoom lens, ie 28-75,70-300 and 150-500 lens cheers guys

 

[admirable]

I think the standard is 50x the focal length

 

[iwols]

Thanks but i have zooms

 

[JackBarley]

Can adjust at top and bottom of zoom range on Canon lenses on my 7D2, recommended distance is 25-50 times focal length.

 

[iwols]

Cheers but cant do that on nikons

 

[mrgubby]

Cheers but cant do that on nikons

Check MFA at 50x whatever your most used length is and set it to that ?

 

[ecoleman]

http://s449182328.websitehome.co.uk/focal/dl//Docs/FoCal Test Distance_1.1.pdf

 

[iwols]

thanks guys