I'd guess that my raw technical skill and ability to get a clear, sharp, 
photograph is likely in the upper half of people who own DSLRs and three or 
more lenses for them. I choose three to distinguish from the people who buy a 
DSLR kit with one or two lenses and use them as an expensive point and shoot.

If Pentax were to make a full frame version of the K-5, i.e. same pixel density 
and performance on a 24x36 sensor, and the same performance and features 
otherwise, I expect that I would see two advantages:
1) I would effectively have nearly twice the number of lenses, because most of 
my glass would work without vignetting, and I'd get 1.5x wider AOVs on all of 
my lenses. Mind you, my 50 on APS would be the same AOV as my 77 on FF, so the 
actual difference is probably closer to 1.5 times the lens choices rather than 
2 times.

2) Due to the physics limitations of registration distance, I'd see a 
substantial improvement in performance at the wide end, particularly in low 
light.

I would, however, be surprised to find a huge difference in the sharpness, 
clarity, technical excellence, whatever in the vast majority of my photos.  I'm 
pretty good at pushing the limits of performance of my gear in stupid low 
light, but landscapes and such, in good light. First, I'll need to spend a lot 
of money on a much better tripod and head than I have.  And then there are all 
of the physical limitations as mentioned in other posts in this and the sister 
thread on the topic.

I think that it would be accurate to say that for the vast majority of people 
that might buy a camera, the only two things that a full frame DSLR Pentax 
would give them over an APS equivalent are bragging rights and less money in 
their bank account. So, in a reality based market, Pentax would be a little 
foolish to bring out a FF DSLR.

The market, however, is not reality based.  There are a tremendous number of 
people that won't buy Pentax, or are considering changing to another brand 
because Pentax doesn't have a FF option.  Never mind that in most respects the 
K-5 will outperform a large percentage of FF DSLRs, and we can probably expect 
a significant improvement in the next generation of body.

If the goal of Pentax were to produce a camera system with the absolute best 
possible image performance they would (cue wailing and moaning and gnashing of 
teeth) abandon the DSLR format and develop a mirrorless system that uses a 
24x36, or larger, sensor.  The physical limitations of a mirrorbox, combined 
with the jarring and vibration of a 24x36 mirror bouncing around every time 
that you take a photo are direct impediments to the imaging system.  As soon as 
you have to add lenses for retrofocus you lose speed and sharpness of your 
lens.  If the mirror bouncing around weren't a problem, there wouldn't be so 
much attention paid to mirror lockup, and two second delays. I'm sorry, but 
physics is simply an unforgiving bitch.

I suppose that Pentax could try some sort of crazy end run and keep the K-mount 
and registration distance by doing something like putting a 645D (36x48) sensor 
in something like a K-01.  A medium format sensor and a 35mm registration 
distance, and you have at least the theoretical potential for wider AOV without 
the retrofocus elements, but I don't think that even Pentax's pet mad 
scientists are quite that crazy.  Hell, I don't think that even I'm that crazy. 
 

Yes, in good light, optical viewfinders have all sorts of advantages over 
electronic.  But in lousy light electronic viewfinders work better, and in my 
opinion the quality of the final image is more important than the quality of 
the image in the viewfinder.  If an optical viewfinder were that important, I 
could just buy an optical viewfinder to slip in the hot shoe.  

But, no matter what path they take, I'm fairly sure it will be one that will 
allow me to use most of my existing lenses, at least with an adapter, and that 
if the full frame body costs less than $3,000, and I'm still employed, I'll 
probably buy one.

--
Larry Colen [email protected] sent from i4est





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