K10D I know you know this, but your last two posts could read confusingly for a beginner so forgive me pointing this out in words of one sylable.

A 50mm lens is always a 50mm lens. Focal length is a property of the optic and has no bearing on what the image is projected onto. I have a 50mm f/2.8 prime for my Auto110. Within design tolerances it produces exactly the same magnification and depth of field at the sensor as a 50mm in K mount does (the 110 lens would vignette horribly of course but let's ignore that for now).

It doesn't matter if a lens is designed for a DSLR, 35mm film, cine camera or Menkar Imaging Goop from the planet Ceti Alpha 6. If it has a focal length of 50mm, it will still have a focal length of 50mm when attached to your DSLR. (although obviously Menkar lens coatings are optimised for rather redder light than our own Sun produces so the flare will be horrible).


What K10D is getting at is that people who grew up with 35mm film often like to say that a 50mm lens on a DSLR is like a 75mm lens on film. This is true in terms of field of view, but not in terms of depth of field, which is of particular importance when considering a portrait length.

not to mention that Mamiya is over TWICE the price of the Pentax, for $20 grand I should hope it makes the tea and composes the images itself.

the bottom line is that in order to display an image on your screen, a website MUST download it to your computer in some form. Once this has happened, no matter what you try to do to prevent it, that image can be copied (strictly at that point it already has been copied, the user has only to gain access to data stored on their own PC).

If you upload images to the internet which you care if someone else uses, the very least you should do is drop the resolution to the lowest level which suits the specific purpose you uploaded it for.

If you plan to make money by selling the images at any point, I recommend you look into more powerful forms of control such as watermarking and the like.

Personally I simply never upload any photo at more than 800 pix along the long edge.


The internet is a fantastic tool for the free exchange of information. With great power comes great responsibility, don't put any information on it you don't want sharing!

any increase in magnification will always be at the expense of brightness, and presumably size of the optics needed in the prism housing.

Thats why prism finders are always higher mag than mirror ones, the pentamirrors sacrefice light transmission for cost and weight so to get the same brightness you have to drop the magnification.

and both will have to be converted down to 8 bit or less for display or printing.

I'll reserve my judgement until I see some photos from a production camera. The competition you mention hasn't really started yet.

likewise. Leica seem to think there's a market for a larger than 35mm SLR, their S series has a similar size sensor. Of course Leica never go for large markets anyway but it will be interesting to see what happens.

according to that then, if it's a Kodak sensor it's probably this one

http://www.kodak.com/global/plugins/acrobat/en/business/ISS/productsummary/FullF...

that is exactly my thinking, my K10D stays on ISO 100-400 most of the time.

SR allows us to stay pretty low on the ISO even while hand holding unless you're shooting something fast moving in bad light.

I would really relish the ability to get good use out of my old M series primes though, not to mention the ability to go from green auto to Av by turning the aperture ring like I used to with my MZ-7

I think it's because the Canon mount is entirely electrically controled, making it more complex to reverse engineer than the partially mechanical Pentax, Nikon and Sony ones.

look here http://kmp.bdimitrov.de/technology/K-mount/crippled_AF.html for a description of the "crippled" Kaf mount.

If Pentax built a camera with these capabilities on top of my K10D, I would be begging my fiancee to let me buy one:

fully functional Kaf mount
ISO 6400 usable in a pinch, with ISO 100 as good or better than K10D (I'd like good high ISO, but not at the expense of ISO 100 IQ).
factory fit split screen finder which doesn't mess up metering.