Low light capability of "foreign" bodies

[PureClassA]

LOL! I have missed the lenscap shooters club. Someone needs to make a blogpage by this name....

To serious photographers, the number of stops you can push a shot with the lens cap on is of paramount importance.

You keep saying stuff like this, and calling people iirc "lens cap shooters". Usually in DR arguments, but now with ISO.

What is the origin of this? Who takes photos with the lens cap on? Is that some sort of testing metric I've never heard of?

EDIT: I finally found some articles talking about it. I'd never heard of it before. Weird.

1. Capture RAW image at ISO 100 with lens cap on.
2. Push exposure 5 stops in post.
3. Examine noise.
4. Make broad, sweeping generalizations about camera performance.
5. Congratulations, you've joined the lens cap shooters club.

 

[Aglet]

I really have to disagree with about the luma noise. I own an X-T1 and it's really no better than any of the other APS-C bodies out there. Below is a comparison of the X-T1 and the 7D2 taken from DPReview with both cameras set to ISO 6400. I adjusted the exposure of the X-T1 shot such that the histogram was as close as possible to the 7D2, added a tiny amount of chroma NR to both (zero luma NR), and then exported them both to 16MP jpegs. Can you tell which is which? The only differences that I see are a slightly different character to the noise and one maintains detail better than the other.

Fuji<-->Canon

I do see quite a large difference in the character of the noise, the kind you can see in printing larger format.
Canon's noise character tends to be "blotchy" both in chroma and luma. Canon noise also tends to produce a reddish cast to shadow areas, easily visible in this comparison.

So, without having much experience with the 7d2's files, other than knowing they finally did a decent job of getting the 8pixel wide vertical stripes out of the shadows, and not bothering to look at the originals, I'd say the right side fits with my past experience of typical Canon noise structures. If the 7d2's on the left then they've done a pretty good job of improving the noise characteristics.

Thank-you for taking the time to create the visual to support your point.

EDIT: after looking more closely at the full rez sample you provided, the color artifacts make it look the other way around. Huh... Guess it also goes to show one person's raw processing methods and converter choices can make quite a difference too.

 

[Hillsilly]

Just looking at the DPReview comparison, the 7Dii file has a lot more chroma noise (ie red and blue speckles). I prefer the X-t1 image for that reason alone. Still, the X-t1 stops at ISO 6400....It would be interesting to see how a lens cap shot on the 7D2 at ISO 51200 compares to one from X-t1 at 6400 that's pushed three stops.

 

[PureClassA]

To serious photographers, the number of stops you can push a shot with the lens cap on is of paramount importance.

Really serious photographers also shine flashlight through the top LCD panel while taking picture with the lens cap on.

While riding backwards, naked, on a stampeding rhino, thumb over the viewfinder, operating in Live View at ISO 256000, and shouting "YEEEHAA!!" As loud as possible

 

[raptor3x]

Just looking at the DPReview comparison, the 7Dii file has a lot more chroma noise (ie red and blue speckles). I prefer the X-t1 image for that reason alone. Still, the X-t1 stops at ISO 6400....It would be interesting to see how a lens cap shot on the 7D2 at ISO 51200 compares to one from X-t1 at 6400 that's pushed three stops.

The reduced chroma noise on the X-T1 is only because the larger stencil size of the X-Trans sensor and the different de-mosaicing algorithm has signficantly stronger implicit chroma noise reduction, you can achieve the exact same effect by applying a slight chroma noise reduction to the 7D2 files.