Re: [PRODIG] Reflection of chip in shots on sigma macro lens on d100

[Rob Wilkinson]

 i4images wrote:
Have been using my sigma 105 macro ex lens for some studio work on my
d100. I am getting a rectangular mild blue shape appearing in the 
middle
of the shots, which is in the same place when portrait or landscape. I
have never noticed this before. I am thinking it must be a reflection 
of
the chip on the back element.
had exactly the same problem with a Sigma 28-70 2.8 with white 
background!
So it's a reflection of the chip....only evident at the wider end of 
the lens.
Good to know it is not just me.
Cheers
Rob.



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