I bought this sigma 150-500 for my Nikon D5300 through website. But when I attached it on my camera I noticed that VR (vibration reduction is not working. After some research on internet I came to know that firmware of lens is not supported.and sigma company is offering free firmware upgrade. But would not be possible for me right now. I want to know if there is any other way that I can make my lens work on d5300. Any modification on circuit board of lens can be managed. Anyone who can guide me . I think some looping on circuit board must be there and possible. Please guide and help.
You have two options at the moment
A) USB dock firmware upgrade
B) sigma service centre repair if parts available
A home hatchet job on the lens NOT A HOPE yet as no one desperate enough yet to wreck their lens in the attempt
My advice sell the lens or the body and use the previous Nikon model that works
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