FD 50mm f 1.8

Started 7 months ago | Questions thread
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FD 50mm f 1.8
7 months ago

I recently bought a FD to  EOS adapter to use with my 50mm and T3i. The adapter works well but at wide open the image has a veery hazy/dream like/look to it

canon FD 50mm f 1.8

As I increase the aperture

f 4

f 5.6

this effect goes away,

f 2.8

Does anyone know why or have experience with this phenomenon?

 yesfan72's gear list:yesfan72's gear list
Canon EOS-1D C Sigma 18-300 F3.5-6.3 DC Macro OS | C
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