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Robert M Poole

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Lovely rendering of that summarit F1.5

 

Sometimes i think that is a better lens that the new ASPH ones for B&W, The rendering is magic, and it has plenty of Leica Glow :)

Thank you, in considering trading it in for a 50mm f2 Summacron but will half a stop make much difference? It is a lovely lens.

 

www.robertpoolephotography.com

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Thank you, in considering trading it in for a 50mm f2 Summacron but will half a stop make much difference? It is a lovely lens.

 

www.robertpoolephotography.com

What is your calculation to come up with half a stop?

2-1.5=0.5 stop?

 

2.8-2=0.8 stop?

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What is your calculation to come up with half a stop?

2-1.5=0.5 stop?

 

2.8-2=0.8 stop?

 

I'm not the technical type so please correct me but I figured it out like this:

 

My current lens is f2.5 (Summarit 50mm f2.5)

I would like The Summacron (50mm f2) is f2 

The difference in between 2.5 and 2 is 0.5 I presumed this was half a stop? I just put it in a calculator on here http://www.scantips.com/lights/fstop.html and see that it is  0.67 EV

 

Like I say, I'm not technical so please correct my thinking if I'm completely misunderstnding how to work it out

 

Rob

 

www.robertpoolephotography.com 

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