ND filter switch "clicks"...
OK, so it's not EX1 specific (in fact, I even hope it might be less of a problem with the EX1 which I'm waiting for, than with the V1E that I'm using) - but here it goes, a very general inquiery...
With the V1E, I'm limiting the aperture to above 5.6 in order to avoid diffraction effect, which (I have tested it) may considerably soften the image. On a brigth summer day, this means that going from shade area to full sunshine requires switching ND1 or ND2 on to avoid overexposure, as the iris cannot go small enough; of course the opposite is also true. Now, the frequent ND filter switching on/off produces very audible clicks in the audio... Can anyone explain to me why the manufacturers stick to "hardware ND filters" rather than replace it with some software equivalent? Wouldn't negative gain settings (even below -3dB that the EX1 or Canon A1 have) yield the same result? This could be engaged with a soft button pressing, which of course wouldn't spoil the audio... Just a thought, any comments welcome! Also, is the ND switch any softer/quieter on the EX1? |
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Thanks Eric - not any good news at all :(
The Z7 seems to have an all new solution (4-step setting without a "lever") - add to it the higher res EVF, and it looks like the prosumer division is one step ahead ! |
You cannot do in software what a ND filter does.
On the big cameras even the Daylight / Tungsten balancing is done in a hardware filter. From what I've seen this results in somewhat better performance of the camera under tungsten lighting. |
Think of each pixel as a bucket. In the bottom of the bucket is sludge, its depth influenced by temperature, exposure time and other matters. Think of light as a fluid. What you want is to fill the bucket before each emptying (download), which will give you the best fluid to sludge ratio. The sensor consists of a lot of buckets, so in the uneven shower of entering fluid some buckets will fill more than others. We don't want any to overflow and we don't want some to deliver mostly sludge. After the buckets are emptied processing cannot alter the fluid/sludge ratio. ND filters, iris and shutter speed control the shower so we can fill some of the buckets to the brim without overflowing. Gain setting doesn't affect the shower, only the length of the ruler measuring fluid depth in the buckets.
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As I understand it, the ccd block is optimized for 3200K (the point where the R, G, and B amps are at unity gain). -gb- |
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