Sigma 50mm 1.4 soft?

Started Apr 21, 2013 | Discussions thread
James O'Neill Veteran Member • Posts: 4,464
Re: Sigma 50mm 1.4 soft?

Aidan Gibson wrote:

I had one and could get sharp pictures but it's obviously a little tricky @ 1.4 but a bit hit and miss.

Is this because of the narrow DOF? If yes then I thought of this and that would also explain why it starts to get sharp a f2.

On another thread (on Pentax's 50mm being soft) I posted the sums to calculate DOF. But at 2M / 6ft D.o.F is +/- 5CM / 2"

they are in focus but mostly pretty soft.

Don't expect the maxium sharpenss from any lens at its widest apperture. My hunch is that the resolution of todays sensors allows you to see the step in softness in both Pentax and Sigma 50mms when you open up that last stop.

 James O'Neill's gear list:James O'Neill's gear list
Pentax K-5 IIs Pentax K-1 Pentax smc FA 50mm F1.4 Pentax smc DA 18-250mm F3.5-6.3 Pentax smc FA 43mm F1.9 Limited +2 more
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