Hi, >>Would be interested to hear also from folks who use SMCT 85/1.8, SMC >>85.1.8, SMC-M 85/2 and SMC-A 85/1.4 as to your favorite portrait >>distances and f stops. >> >>I am just getting to know my SMCT 85/1.8. From 5.6 on it seems very >>sharp, and at 1.8 it is not really usable due to the very narrow DOF. >>Any recommendations for points in between. Have had a few portraits >>come out really really well, with excellent definition, lovely bokeh >>and a hard to describe silky feeling, but cant for the life of me >>remember what f stop I was using! >> >>Antonio
> You might try fCalc to go back and re-create the f-stop by determining > the in-focus distance. there are so few points in between 1.8 and 5.6 that I'd say a little experimentation and note-taking would establish the result quite easily. Assuming a portrait is a head and shoulders shot, say 60cm in height, then the focal distance is 1.75m (about 6ft). Depth of field varies from about 10-15cm (4-6") for f/3.5 to f/5.6. Assuming the eyes are the focal point and the background is unfussy and at some distance then this should produce good results. -- Cheers, Bob
