interesting diffraction effect? Sigma 85, D1x, SB26

[Peter Blake]

not something I have come across before, I am assuming that the fairly direct light from an SB26 off to the left, has caused this green & purple tinge seen on the lefthand surface of the film back?

not a chromatic aberration per se though?

 

[Hamish Gill]

I think that's called Spherochromatism
Which lens is it? You can probably find out if it is susceptible to it...

 

[Peter Blake]

I think that's called Spherochromatism
Which lens is it? You can probably find out if it is susceptible to it...

Sigma 85mm. I quite like this type of product shot (narrow dof, lit). perhaps will try again today without a filter - I wonder if that will make any difference.

 

[Chris Dodkin]

Spherochromatism - I think there are pills for that Hamish!