buying used DVX? - check list

schteevie

Well-known member
A friend of mine is planning to buy a used DVX100a and will have the opportunity to test it before buying... I am compiling a check list for him
- any aditional thoughts would be apreciated.

Physical/visual inspection:

- check for obvious signs of abuse, dings on corners indicating drops, lens surface scratches, etc.
- check for smoothness of lens barel operation (focus and zoom ring) - is it crunchy indicating dirt or misalignment?
- check that the LCD is still firm and stays put when adjusted
- make sure tripod mounting threads are not stripped

Functional test:

- power up, and check all functions (more detailed list to come)
- have a look at the scene file settings to see if anything is way out of wack (will show if the previous user knew what they were doing)
- restore camera to default settings by pressing the small reset button beside the speaker
- insert tape, shoot some footage in all scene file modes, play it back, and look for drop outs or other issues.

Detailed camera test:

Roll tape while checking:
(maybe talk though what you are doing so you have it "slated" on audio?)

- exposure all stops
- focus range at various zoom settings
(from min focus, slowly through to 20 feet and then to infinity)
- audio inputs by pluggng mic into both one at time (check audio level pots while rolling)
- digitize the footage (this will also help confirm FW port works ok) and look at it on a full res monitor, listen to audio with a good head set.



this was off the top of my head... I'll add to it as I think of more - any other help would be apreciated.
 
One of the first "functional " tests I'd do is making sure you don't have back focus problems. Set up a focus (star) chart 6-8 feet away zoom in fully, focus carefully and zoom out slowly. The image should stay sharp throughout the range.
Shoot this test at f/2.8 or f/2.0 for the shallowest dof...if your stopped down too far (f/8 or below) everything tends to look in focus and the problem will be harder to see.
If you do have back focus issues you're looking at a "computer alignment" at a
minimum and a bad lens assembly in the worst case.

Hope this helps.
Ken
the Screen Skins guy
 
Back
Top