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Sony ENG / EFP Shoulder Mounts
Sony PDW-F800, PDW-700, PDW-850, PXW-X500 (XDCAM HD) and PMW-400, PMW-320 (XDCAM EX).


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Old November 11th, 2007, 07:42 AM   #1
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CA and extenders

I'm still pondering what lens I should be getting with my eventual purchase of an F355. Not simple as I also have remote focus and zoom for some conference work (which would also need upgrading if changing from my current Fuji to Canon lens).

I currently use a 570 with a cheaper Fuji A13x6.3BERM-SD. At full zoom and in high contrast situations (like a conference stage with presenter against projector screen etc), I notice fairly extreme CA. This is all without the extender in. TBH I rarely use the extender as the DOF is so shallow, it makes focussing very difficult with my remote focus control.

So my question is - I've heard people say that CA is more likely/apparent with extenders - but is this true when using AND not using the extender?

I'm also wondering what kind of difference I will notice between my current camera and lens and the F355 and a good quality lens like the KH21ex5.7 IRSE?

Thanks,

Paul.
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Old November 11th, 2007, 07:59 AM   #2
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CA is usually much more pronounced when using an extender. When the extender is not used there is normally less CA. Most lenses are optimised for use without the extender. I don't really like extenders, they are useful for increasing the focal length but the loss of light and other optical abberations they introduce can be harsh. HD is unforgiving of lenses and will show up any issues much more quickly than SD.
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Old November 11th, 2007, 08:00 AM   #3
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Thanks Alister.

What lens(s) do you have for your XDCAM camera?
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