ISO25600 from GX7

alcelc wrote:

Due to my oversight, I used to think that GX7 can do highest ISO3200 only because I use e-shutter most of the time.

A couple of months ago, having been inspired by a member here and started to build up a C mode particularly for high ISO on GX85. The setting is:

• A mode,
• Burst=M,
• Manual ISO=25600,
• Standard Photo Style having NR=-5 (to retain most fine detail).

I took a burst shooting between 10~15 frames, imported to PhotoShop and stacked them using Median. The result is quite promising. When I try to set the same to GX7, I faced max ISO3200 only (my mistake) and so not worth to occupy a C mode.

A few days ago, worked with GX7 for something else and in m-shutter, I found ISO25600 could be used. Do the similar thing as GX85 and the result looks quite interesting.

The following is one of the 11 original OOC jpgs from GX7 at ISO25600. It has nothing to write home about it but I wish the dark knife sleeves/covers, the fine detail of knife handle, the blue and black color thigh protector, the wooden box, the dark background etc showed the serious noises of various kinds...

After stacking of 11 images plus a mild sharpening:

Cropped images of the above for easy reference:

The original might show more difference.

Just wish to share it with other GX users.

P.S. Teaching from Adobe on PS to do stacking: https://helpx.adobe.com/photoshop/using/image-stacks.html

A nice demonstration, though in general you'll get the same result in terms of noise using 11 times slower shutter speed and an ISO of 2300. Both need a static subject to work. The advantage of stacking is that you can can cancel out some shake effects, since the shots get aligned in post, but IBIS does that as effectively. I suppose, putting the two together you can get exposure times even longer than IBS can give you. The other advantage is that you can get a super-resolution effect, though you have to do the stacking somewhat differently.