Diopter

[joe_cormier]

<p>I own a D-300s and had to adjust the diopter to match my eyesight. Can anyone tell me if I elect to use live view and<br>

zoom in to focus, will my image be the same sharpness as if I used the diopter? As always, thanks in advance. Joe</p>

[blumesan]

<p>If you are using autofocus adjusting the diopter should have no effect on your focus. If, however, you are focusing manually then using live view should be more accurate than using the viewfinder with diopter adjustment.</p>

[rodeo_joe1]

<p>Magnified Live view will probably be sharper, or at least your focusing will be more accurate, which isn't quite the same thing. Direct manual viewfinder focus is a bit hit-and-miss, even using the focus confirmation dot.</p>

[nsfbr]

<p>The diopter adjustment is to allow your eyes to focus sharply on the focusing screen, it has no other purpose. So, as long as you can see both the image on the focusing screen or in live view there should be no difference if your AF system is perfectly calibrated. As Rodeo pointed out, or at least alluded to, Live View is taking an image from the sensor itself so there is no calibration to get in the way. It's WYSIWYG. Of course, live view is not always an option, especially not for anything that is moving.</p>

[joe_cormier]

<p>Thanks to all, learned something today. Joe</p>

[andrewkurcan]

<p>I'll add to what Joel said - the diopter adjustment resolves the discrepancy between your eye and the prism. No distance is changed between the viewfinder prism and the focusing screen.<br>

As long as you rectify the image to your eyes, you'll be fine. Test this by using a focusing sheet, or zooming a lens all the way in, autofocus/focus manual using live view, and then adjust the diopter to your liking. I mark my setting with whiteout, just incase when crating my gear something gets moved. </p>