GH3 How to Backfocus TV lense?

[funkytwig]

Hi, I have a Fujinon 10-140 f1.7 TV lease with a adapter that is designed for infinity focus. I got it because it is parfocal. How do I back focus it?

Ben

 

[malibudutchie]

Yep, zoom in and focus. Now zoom out. If the subject is out of focus when you are all the way wide, you need to unscrew the back focus until it rotates and brings the subject into focus. Back focus is now set. Takes me back to ENG days - they are great lenses.

 

[funkytwig]

Yep, zoom in and focus. Now zoom out. If the subject is out of focus when you are all the way wide, you need to unscrew the back focus until it rotates and brings the subject into focus. Back focus is now set. Takes me back to ENG days - they are great lenses.

Yes, I know how to backfocus, its just I cant work out what to unscrew;(.

Ben

 

[malibudutchie]

There is a little black or silver protruding screw on the back focus ring near the start of the lens -lift and unscrew and then rotate - I'm sure there is.Have a look here http://www.ebay.com/itm/Fujinon-Fuj...27852627?pt=Camera_Lenses&hash=item4d0cd64c53