How often?

[tom dart - (kitekook)]

Hello,
I have just received my lens align and have been using it today.

I was wondering ...how often does a lens/camera need to be put through calibration.
Once dialed in does it just stay? or does it drift over time?

[Michael Tapes - (MichaelT)]

It is best for you to establish the best timing. Some camera/lens combinations are very stable, and some drift over time, and/or environmental conditions.

So my suggestion is to re-test after 2 weeks or so. If stable, let it go to a month next time, and establish what works for your specific gear. Also if you are approaching a critical session that will be very shallow DOF, I would do a check before the session.

Also I would re-test when returning from and leaving for a trip.

Hope this helps..