david-m Posted March 7, 2006 Share Posted March 7, 2006 I want to get an 85mm to use wide-open (for very selective DOF on portraits) for my D2X, ideally the 1.4 if they would drop the price by �400. So, how much different is the DOF between the 1.8 and 1.4 anyone? Guess the quality is roughly the same at this kind of aperture -a little soft? Thanks so much. David Link to comment Share on other sites More sharing options...
mark_sirota1 Posted March 7, 2006 Share Posted March 7, 2006 At 8' subject distance with an 85mm lens on a D2X, the DoF is about 1.8" at f/1.4 and 2.3" at f/1.8. So about a half an inch different at that distance. However, the look of the out of focus areas on the 85/1.4 is much smoother than on the 85/1.8, IMHO. Link to comment Share on other sites More sharing options...
NetR Posted March 7, 2006 Share Posted March 7, 2006 David, I think you are confusing two different things. Depth of field at an aperture tells you how far before and behind the focus point you get apparent sharpness. Quality tells you what sharpness you get at the focus point. There are formulae available that you can use to calculate this - check out: http://www.photo.net/learn/optics/dofdigital/index.html for the formula. I know when the 85f1.8, at 1.8, is in focus on the pupil of the eye, the tip of the nose is a bit fuzzy (not always a bad thing). But open up an excel spreadshhet and do some calculations if you want an answer in mm. REgards, Ross Link to comment Share on other sites More sharing options...
leslie_cheung Posted March 7, 2006 Share Posted March 7, 2006 We are talking about centimeters here. Link to comment Share on other sites More sharing options...
todd1664878707 Posted March 7, 2006 Share Posted March 7, 2006 <a href='http://www.dofmaster.com/dofjs.html'>www.dofmaster.com/dofjs.html</a> Link to comment Share on other sites More sharing options...
henry_dorsett2 Posted March 7, 2006 Share Posted March 7, 2006 You can check it for yourself... http://www.dofmaster.com/dofjs.html HD Link to comment Share on other sites More sharing options...
david-m Posted March 7, 2006 Author Share Posted March 7, 2006 Thanks for the answers, I will look at the sites suggested. Ross, I know all about DOF and was not confusing anything - thanks all the same. David Link to comment Share on other sites More sharing options...
david-m Posted March 7, 2006 Author Share Posted March 7, 2006 Hey, great site Thanks! David Link to comment Share on other sites More sharing options...
runkel Posted March 7, 2006 Share Posted March 7, 2006 For the 85/1.4 AF version, it's uncharitable to call f/1.4 "a little soft." This is a fully usable aperture and what is in focus will be very sharp. Link to comment Share on other sites More sharing options...
dj_soroka Posted March 7, 2006 Share Posted March 7, 2006 Ditto what Matthew Runkel said. Link to comment Share on other sites More sharing options...
arthuryeo Posted March 7, 2006 Share Posted March 7, 2006 >For the 85/1.4 AF version, it's uncharitable to call f/1.4 "a little soft." This is a fully usable aperture and what is in focus will be very sharp. I just got mine a couple weeks ago. This is a fine lens and the focused area is distinctly sharp: this is *NOT* a Nikkor 50mm/1.4AFD. It's one of the more nicely crafted Nikkor lenses. Link to comment Share on other sites More sharing options...
peter_cofran Posted March 7, 2006 Share Posted March 7, 2006 i have the 1.8 and its really soft wide open. i prefer to shoot at least at 2.8 Link to comment Share on other sites More sharing options...
patricks Posted March 8, 2006 Share Posted March 8, 2006 <center><img width="511" src="http://www.nordilux.com/photo/crack.jpg"></center> </p><center><i>85/1.4 wide open</i></center> Link to comment Share on other sites More sharing options...
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