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Showing results for tags 'focal length'.
Found 2 results
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Ok.. so i have a A6400 which has an APS-C sensor.. I use a range of lenses of which include both full frame and crop sensor designed lenses.. I know using a full frame lens i get a crop zoom of 1.5x .. so for example my Sony FE 50mm becomes a 75mm, my Tamron 70-300mm f4.5-6.3 DI III RXD becomes a 105-450mm Now.. if i use a aps-c lens.. i get the exact mm yes ? ie.. if i use the Sigma 56mm f1.4 DC DN .. this IS a 56mm on my A6400 as the DC denotes the lens was made for APS-C sensors and it even has the aps-c cut out on the back of the lens. Do i read this right ? .. or do i still have to put a x1.5 35mm zoom in effect.. so my 56 becomes an 84? This is something that has always confused me... Can someone clarify just what mm i am getting using a dedicated aps-c designed lens on a aps-c sensor please! -
I have an OM 135mm lens and 2x tele-converter, giving me a lens of 270mm focal length. The manual focal length settings available in camera jump from 250mm to 300mm. Should I choose the higher or lower focal length to get the best results at 270mm? I have asked Sony, but they were of little help.