SDQ Dynamic Range

lockhrt wrote:

Hmm. That is almost half of what I am used to.

That is not correct. According to DxOMark K5 has a max if 10.5 PDR. K-1 has 11.30.

lockhrt wrote:

raylob wrote:

lockhrt

I ran a quickie comparison test between my FF K1 + 31mm ltd lens and my SDQ + 18-35mm A lens set to approx same 31mm focal range as my Pentax lens. Same aperture, same tripod no sharpening but images adjusted for brightness. There was little difference generally but I thought that the SDQ images were a little sharper. Don't forget that the Pentax is FF and the 31mm is one of Pentax's best lens! I use the Pentax as an alternative when conditions or subject matter does not favour the Sigma. Both systems are excellent at what they are designed for. I suspect that my post may not clarify your dilemma but in reality I get more satisfaction from my Sigma. I do not find that the DR is much of a problem.

Wow, you're right - this does not help me at all! I much prefer the SDQ photos above to the K1 except for maybe the twine, but that had more to do with exposure. And, the K1 is full frame, with the Holy Grail of prime lenses. This says a lot for the SDQ. Hmm.

Wouldn't a full frame Foveon be amazing!?

Not having a big DR is annoying, but it can be overcome. Use SFD mode and play with the raw image. If there is wind, use a graduated nd filter. It makes post processing much easier, and with less HD artifacts from overdoing SPP sliders. Just make sure to buy a good quality filter, not the el-cheapo ones. Is it more fiddley? Yes. But it makes you slow down and THINK about what you are DOING, and why which is better. On each shot, I set the white balance in the camera using settings, or manual white balance using a card. It made a big difference with the final good color quality. I always carry a light travel tripod to use for SFD mode if the situation calls for it. Slower work is better.

Sugasmune wrote:

It was measured in another topic, the photographic DR was little under 8 EV.

Who measured that?

Shutterbug says they measured it to 11.6 at iso 100. This sounds high to me, but I don't buy under 8 EV.

https://www.shutterbug.com/content/sigma-sd-quattro-h-mirrorless-camera-review#zpQFb6jrLjSAGuoj.97

PrebenR wrote:

lockhrt wrote:

Hmm. That is almost half of what I am used to.

That is not correct. According to DxOMark K5 has a max if 10.5 PDR. K-1 has 11.30.

Where did you get that DXOMark score for the K5?

This page https://www.dxomark.com/Cameras/Pentax/K5---Measurements seems to indicate 14 stops DR (using their system). I don't know what that translates to in real world use at acceptable shadow noise levels. DR seems to be one of those specifications where you can score almost anything depending on how the measurement is done.

xpatUSA wrote:

PrebenR wrote:

Sugasmune wrote:

It was measured in another topic, the photographic DR was little under 8 EV.

Who measured that?

Shutterbug says they measured it to 11.6 at iso 100. This sounds high to me, but I don't buy under 8 EV.

https://www.shutterbug.com/content/sigma-sd-quattro-h-mirrorless-camera-review#zpQFb6jrLjSAGuoj.97

Thanks for the link. There's a DP2 Merrill review there too and (by coincidence?) it's DR is also measured at 11.6 EV.

Bill Claff is an acknowledged expert on DR here on DPR and has published his method (PTC curve) at his website. He has tested Sigmas in the past but disappeared from his site a long time ago. Not saying it was he who tested the qh ...

http://www.photonstophotos.net/

OT, but he did test my SD9 which came to 9-and-a-bit EV.

When I finally get my MC-11 I can test my sd q h against the A7rii. At any rate the A7rii will be my B camera

DMillier wrote:

PrebenR wrote:

lockhrt wrote:

Hmm. That is almost half of what I am used to.

That is not correct. According to DxOMark K5 has a max if 10.5 PDR. K-1 has 11.30.

Where did you get that DXOMark score for the K5?

http://www.photonstophotos.net/Charts/PDR.htm#FujiFilm%20GFX%2050R,Pentax%20K-1,Pentax%20K-5%20IIs,Ricoh%20GR%20III,Sony%20ILCE-7RM2