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Sony 100 STF GM Lens


tonygale

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  • 5 weeks later...

Tony, any chance you could explain how the STF part of this lens works? It's always been a bit of a mystery to me.

Hey David,

Essentially it has a filter/element inside the lens that is like a graduated ND expect it is clear in the middle and blocks more light as you move to the edges. That is why the f/stop is 2.8 but the t/stop is 5.6. The result of all that is the bokeh is smoother, especially at the edges of the out of focus areas. I hope that is helpful?

 

 

 

 

 

 

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Hey David,

Essentially it has a filter/element inside the lens that is like a graduated ND expect it is clear in the middle and blocks more light as you move to the edges. That is why the f/stop is 2.8 but the t/stop is 5.6. The result of all that is the bokeh is smoother, especially at the edges of the out of focus areas. I hope that is helpful?

 

 

 

 

 

 

Thanks Tony. That is the best description of what makes that lens different I have ever heard. You rock.

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