colorcasting with H3dII

[ElmarDam]

This photo(100% crop) was shot with H3dII-31 with HC35

Does anybody know why and how this colorcasting arises? But, more important.. how i can avoid this in the future?

thanks!

 

[cly]

To me it looks like standard moire. Slightly changing the distance might help. Using a different aperture normally does help.

Have a look at, e.g.,
Imatest - Color Moire

Chris

 

[gazwas]

Moire not colour cast.

Only way to avoid on a 39Mpix back is to not focus on that portion of the image causing the issue (often impossible) or try a software fix with moire removal in Phocus.

 

[weinlamm]

You can remove it very simple. Do you use LR or PS? - And I think, the new C1 should habe an option for remove, too.

 

[torger]

Most medium format sensor lacks antialias filters to provide more pixel-peep micro contrast at the cost of having false colors and moiré. Fabrics is worst case.

You can remove it (or rather hide it) with software, but the result will be worse than it had been with a proper antialias filter on the sensor. The other alternative is to shoot less sharp pictures by having a smaller aperture or shoot slightly out of focus.

Yes, being without antialias filter is bad, but MF sells a lot on resolution and being without it gives a pixelpeep advantage and as we all love to pixelpeep (but rarely admit it) being without AA filter is generally seen as a "feature" rather than the bug it is. Be glad that you don't have a 22 megapixel sensor, it would be even worse on that

 

[Giorgio]

Sometimes a small change in camera angle (position) will eliminate moire.

 

[ElmarDam]

tanks for the replies!

This technique worked quite well for me:
A New Way to Remove Moire on Vimeo

 

[Paul Claesson Hasselblad]

I recommend using the Moire tool in Phocus, available for Mac and PC.

Go to the Adjust tab > Noise filter > Moire
A level 2 or 3 should do the trick.