eatmor18

As an owner of both, I can say the DK-21M is certainly compatible with the D70.  It does not require any adapters.  B&H's recommendation for the DK-22 adapter is dead wrong.  You could hook the DK-22 to your D70, or the DK-21M, but not both at the same time.  I think the confusion might come from the fact that back in the good ol' days, pre-DK-21M, we D70 owners were using the DK-17M with a modified DK-22 to hold it on.

I do hear of glasses wearers complaining about the extra eye relief making the DK-21M unusable.  Even with my naked eye pressed against the back of the magnifier, I sometimes lose sight of the corners of the viewfinder, which I don't mind at all.

I think you're right to assume that it won't fit inside the Ike housing.  Good thing it has its own magnifier built-in!

That's correct, they're certainly not using the same sensor.  The similarities are that they are essentially the same overall dimensions, and they are both using the SuperCCD HR pixel layout (though different "generations" as Fuji calls them).

Yet to be determined is which will hold more detail in those high-ISO shots. My money is on the F50, MikeO is betting on the F30.  

All of the HR pixels are the same size.  The F30 had 6 million of them, the F50 has 12 million of them.

I knew somebody would misunderstand this -- I should've gone back & edited it.  On a particular sensor, all of the HR pixels are the same size, as opposed to SR pixels, where you have big & little pixels mixed together in the same camera.  So, no, the F50's sensor is not larger than the F30's.  They're the essentially same overall size, and thus, each F50 pixel is half the size of a F30 pixel.

6 million S and 6 million R type pixels.

Yeah, except this is NOT a SuperCCD SR (Super dynamic Range), it's a SuperCCD HR (High Resolution).  All of the HR pixels are the same size.  The F30 had 6 million of them, the F50 has 12 million of them.

Why do you all think that this is an interpolated 12 megapixels?  Everything I'm reading is leading me to think that there really are 12 million dots on the sensor.  With past versions of their SuperCCD HR sensor, the number of detectors on the sensor was called "effective pixels," and the larger interpolated size was called "recorded pixels" and/or "output resolution."  Fuji is now saying that the F50 has 12 million "effective pixels," and DPReview says it has 12 million "sensor photo detectors."  Sounds very real to me.

So now each F50 pixel is half the surface area of those famous F30 pixels.  My bet is that the noise will STILL be lower in an equivalent print.