Also, a electronic viewfinder can display manual focusing aids. ) settings are not visible in the optical viewfinder, but can be visible in the electronic viewfinder (depending on camera model). Exposure, white balance, color and image crop (3:2, 1:1. On the other hand with an optical viewfinder you will not see exactly what you will get in you image file. That means you get much better battery life as you can let the camera go to sleep, and you can also be framing the picture while the camera wakes up.Īn optical viewfinder can never have any lag, since it's optical it operates at the speed of light. That means that you can just put the camera to your eye to frame a picture or decide if there is a picture worth having and it's there instantly: you don't have to keep the camera awake to use the OVF. Older EVFs were laggy and not really very high resolution: I think that newer EVFs are much better in this regard.Ī significant advantage of an OVF is that you can see through it it with the camera off. OVFs on DSLRs really only work with the lens wide open (you can often stop the lens down, but then the OVF is unusably dark for general use), or on rangefinder-style cameras they go to the other extreme: there's huge DoF in the OVF and you have to know what the lens will see. However, transmissive LCDs are much more limited in terms of what can be superimposed practically, because they can basically only darken, not lighten the image.Įventually, when transparent OLEDs make their way into DSLRs, this difference will go away, but as far as I know, they have not appeared in any DSLRs yet.ĮVFs generally have the advantage that they let you see what the camera is going to see when you take the photograph, and in particular you can look through an EVF with the lens stopped down, so you will see the depth of field that will be in the picture. Note that it is possible to overlay some data over optical viewfinders, of course, such as focus point dots, boundaries of focus zones, and so on. For cameras without dual-pixel autofocus or dedicated focus pixels, significantly less reliable focusing.For cameras without a fully enclosed viewfinder, light from screen can annoy others.Unless combined with electronic front curtain, significantly longer shutter lag (because it starts out open).Temporarily obliterates night vision when used in the dark, making it hard to get around.Lower resolution when not zoomed in (harder to judge focus by eye).zebra stripes, focus peaking) see note below. Can superimpose more complex data over the image (e.g.Can see (almost) exactly what the camera sees, even in low light.Can zoom in to verify precise focus and depth of field.Potentially smaller and lighter camera bodies and lenses (particularly wide angle lenses).
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