The ‘L’ – disease strikes again

[HDNitehawk]

@clemmb, I think you could get an idea of this from the dof calculator. At 10' the f2.8 70mm has a dof of 1.03 vs. the f4 105mm at .64. I think at equal distances you may be correct, however to get the exact same framing the f2.8 70mm at 10' would be equal to the f4 105mm at about 15'. At 15' the f4 105mm would have a dof of 1.46. So it may be correct the f2.8 70mm is better if you frame equally. Of course this doesn't allow for differences in the lens and other factors that contribute to good bokeh.

http://www.dofmaster.com/dofjs.html

[HDNitehawk]

So, that means I should easily be able to re-sell the lens for what I paid, if not more... I view it as a long term, essentially free rental - it's a great way to test out a lens.

I have used the same logic in my reasoning and it sure makes sense.
I think this is one of the advanced symptoms.