D1N0

seems to be getting chunkier

By your calculation you would need a 33.3mm F0.94 on aps-c to equal an 50mm F1.4

Yabokkie

The size of the aperture is relative to the focal length. focal length divided by max apparent aperture (in mm) is f-stop 100mm lens with 50mm aperture is F2. So this lens is f1.8 (it's a...

ofcourse not. That's not what i am saying. I'm just saying that f-stop iq equivalence is nonsensical because there are too many influencing factors you are leaving out of the equation. Want better...

cropping means less image, not les iq. iq is dependent on the sensor. smaller sensors tend to give more noise, because of higher pixel density meaning less foton's per pixel. Cropping is not some...

The angle of view does not matter since de aperture stays the same. The real difference is sensor characteristics. Which can be multitude. If you take only sensor size as a variable you are...

yabokkie. So put it on a full frame dslr and shoot in crop mode. Twice brighter than a F2.8 on the same pixels. So you are going to need a stop less iso , so better iq than a 2.8

also:
"By this we mean that it will be able to project an image that's just over twice as bright onto a sensor that's slightly less than half the area, meaning the same total amount of light is...

There is such a lens for pentax. The Sigma 24-70mm F2.8 IF EX DG HSM

Http://www.amazon.com/Sigma-24-70mm-2-8-Standard-Pentax/dp/B001NEK2R8

" The total amount of light gathered affects the signal-to-noise ratio and hence IQ."

That's just relative to pixel size. Pixels in a d800 gather less light than in a D4. Because there are more of...

Not an issue below 200mm though.

News is news. You're hardly going to call your newspaper to send their Terorrism photographer.

It's not like the pentax will disintegrate when you use a none weatherproof lens, or that is has to rain in order to shoot with it.

Not for the aps-c format there aren't. Which is the absolute minimum for any serious photography :p.

Handrian F1.8 does not make brighter pics on FX than on DX. What is does do is give relatively shallower DOF (since you're not cropping). That's why FX pics have more of a film feel to them.

In camera sharpening in jpeg mode works very well. When you select the k5 in the tool en put it on iso 100 (extra sharpeness) it just trashes everything (of course the k5 II(s) have this setting as...

har har har

ability to edit files that are offline. always wanted to do that. Oh wait. That's what I always do.....

so for shooting stills it's actually crap. Gold award. Way to go dvreview

Go to the studio comparison tool and compare it with the Pentax K-5 IIs. Look at the beetle and the Roman print. you'll see moire in the k-5 IIs and not in the D7100.