I have a Nikon d3200 and recently got a Sigma 75-300mm lense When I attach it to my camera it will only work in manual mode which is fine… but I dont know if that is normal? Also when it is attached to my camera it wont let me change the aperture. Yes i did hold down the exposure compensation button and turn the command dial at the same time and it is not doing anything. Please help. I need to change the aperture my pictures are turning out way too dark. Also my flash will not work with the larger lense.
См. статью: Changing the aperture on my dslr?