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#1 |
Regular Crew
Join Date: Jul 2007
Location: London, UK
Posts: 44
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Buying a secondhand XH A1
Can anyone offer any tips for what to check out other than obvious wear, tear, lens damage, functionality etc...
Is there any way of showing hours of head use on the A1? I'll probably quickly check capturing over firewire with iMovie also. Cheers Steve |
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#2 |
Wrangler
Join Date: Sep 2001
Location: Northern VA
Posts: 4,487
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Set presets to neutral, set gain to 0, +6, +12, and +18 dB, at 1/60 shutter or slower and at each setting shoot the inside of the lens cap in a dark room (dark room because the lens cap may have light leaks), then play back looking for hot pixels. if 0 dB gain is clean, you are probably within spec. You will likely see some hot pixels and dark current grain by +18 dB gain.
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dpalomaki@dspalomaki.com |
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#3 |
Major Player
Join Date: May 2005
Location: NYC
Posts: 516
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before you try the above, make sure the AGC switch is set to OFF.
additionally, here are a few things i would personally check for: put the camera in manual mode (M on the dial), set focus to manual, and make sure the iris, zoom and focus rings all work and operate smoothly. check the dial on the base up front and cycle through the shutter speeds. make sure the push autofocus works. put the camera in shutter priority mode (TV on the dial), and make sure the exposure lock button works by pressing it, then manually adjusting the aperture by turning the iris ring. check all the inputs/outputs to make sure there aren't any bad contacts anywhere. this includes component out, composite out, headphone jack, and xlr ports (would be handy to have 48v condenser mic on hand). i would also make sure the white balance checks out properly, only because i got a bad xl1s one time, and both daylight/tungsten presets were reading about 1000K too warm. but never had this problem since. hope the second hand xha1 works out for you. |
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#4 |
Major Player
Join Date: Jan 2007
Location: Tampa,Florida
Posts: 236
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Adding to what Henry said - check the back focus. That is, in manual focus mode, zoom all the way in on an object- properly focus - then zoom out. The object should remain in focus. If it doesn't stay in focus the camera has a backfocus problem.
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#5 |
Regular Crew
Join Date: Jul 2007
Location: London, UK
Posts: 44
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Thanks very much you all... I feel well armed to approach this now!
If anyone has any more tips that would be great. I'll let you know how I get on. |
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#6 |
Go Cycle
Join Date: Dec 2001
Location: Huntington, NY
Posts: 815
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Check for DEAD PIXELS: Bring GAIN up to highest setting...think it's 36. Place the AGC ON with the cap on the lens. Let it heat up for at least an hour.
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Lou Bruno |
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