Originally posted by pcarfan Anyone know how the 50,000 actuation life span for the shutter compares to the leica?
No. But I found the follwing remark in Fredmiranda to be a good one: Replacing a shutter may be a $500 repair only. So, nothing to care about.
Maybe, it would be a good move by Pentax to affirm that the camera gets serviced free of charge during the first three or five years, even should the shutter count have skyrocketed
That would happen to pros and it would be in Pentax' own business interest to keep them happy campers
I'm sure this is what Leica does anyway.
Originally posted by kenyee Biggest mistake I see is lack of tethering support.[...]
What do Leica users use to get rid of moire w/o the AA filter?
Lack of tethering support: Yes, I agree. I wanted to post this but forgot in the heat of the night
My only hope is that Pentax is working on this. This could bring it as an upgrade to K-7 as well which would be great
BTW, this work could be done as contract work for the equivalent of ten 645D only
Moiré: Leica proudly talks about firmware routines to eliminate Moiré at RAW level in software. AFAIK, no word from Pentax yet on this matter.
Originally posted by Erik The noise exists in the analog signal, therefore shouldn't the least significant bit of a 14-bit conversion be less noisy (by virtue of having been quantized from a larger portion of analog signal) than the least significant bit of a 16-bit conversion?
14 vs. 16 Bit:
1. ISO setting of max. dynamic range (supposedly ISO 200):
The full well capacity of one pixel in the KAF-40000 sensor is 42,000 electrons. The minimum (black) noise is -69.3 dB or 14 electrons (note that white cells have at least 205 electrons noise.
This is 11.5 Bit accuracy (aka DR) for black cells and a 12 Bit A/D converter would suffice. White cells can never get better than 7.7 Bit accurate anyway.
2. max. ISO setting of (supposedly ISO 1000):
The remaining well capacity of one pixel in the KAF-40000 sensor is 8,400 electrons. The minimum (black) noise is much worse than -69.3 dB or 3 electrons (note that white cells have at least 92 electrons noise.
This is ~10 Bit accuracy (aka DR) for black cells only or 6.5 Bit for white cells.
By "x Bit" accuracy, I mean including leading zeros, of course.
Therefore, using a 14 Bit A/D converter over a 12 Bit converter has a barely measurable effect and 16 Bit over 14 Bit has no effect. Because the noise is always captured, there won't be any quantization banding effects either.
The mimimum sensor which could benefit from a 16 Bit A/D converter is one with 13.5 DR per cell, like 5 electrons noise and 64,000 electrons full well capacity. AFAIK, this sensor doesn't exist yet.