Red Myst X Focus prob

[vijayvel]

my name is vijay

Four days back i was shooting with red myst X,i faced a problem with focus (ultra prime lens).i used wide 14,i wasn't able to get focus then i thought problem with lens but not,what ever range lens ,i had same problem.we could n't identify problem

then i started taking measurement,For example tape measurement is 5 feet,if i need to get focus on 5 feet object,i needed to put at 7 feet 4 inch like the same problem continues with all lenses depend up on ranges,next after 30 ft every thing is soft.

so, we got new one to shoot......


Please make me clarify what could be the problem?

​

 

[Martin Weiss]

Have you checked the back-focus?

 

[David Battistella]

my name is vijay

Four days back i was shooting with red myst X,i faced a problem with focus (ultra prime lens).i used wide 14,i wasn't able to get focus then i thought problem with lens but not,what ever range lens ,i had same problem.we could n't identify problem

then i started taking measurement,For example tape measurement is 5 feet,if i need to get focus on 5 feet object,i needed to put at 7 feet 4 inch like the same problem continues with all lenses depend up on ranges,next after 30 ft every thing is soft.

so, we got new one to shoot......


Please make me clarify what could be the problem?

​

First of all. Welcome to REDUSER!!!!!!!!

I have some questions.

Was the lens calibrated and SHIMMED the same way the other lenses were shimmed.

There is often a slight varience between lenses if the lens has been shimmed for another camera.

Did you shoot a focus chart from six feet with the lens you were using and check the backfocus of the PL mount?

Was there a prep for the shoot? Did you test all the glass "before" shooting.

These are all basic professional steps before bringing anything on set...

David