I have to admit the flat field binoculars I've spent the most time with (ELs, Nikon WX, Nikon SE) have all seemed to work really well for me. I definitely like the edge sharpness, which seems to help with both ease of view and spatial awareness, and think that these binoculars are a little less fatiguing after long glassing sessions. When I've looked at birds closer in through those binoculars, the experience seemed just as satisfying as with any other. That said, I like plenty of non field-flattened binoculars too. Maybe I'm easily satisfied in that respect!
I, personally, don't really perceive the 3d effect others talk about when using porros, either. I do notice a difference, probably because of the wider set objectives, but that doesn't translate into an impression of greater three-dimensionality (not to me anyway). I'd actually have to say a roof prism binocular more closely matches what my eyes see - as you're looking straight down the barrels, as it were.
One thing I have noticed with porros - almost every one I have tried, from 8x30 to 10x50, I have needed more familiarization time to "learn how to look through them" - compared to roof prism binoculars where the image almost always seems to be much more accessible. With most modern roofs (and even older ones like Leitz Trinovids) I can put them to my eyes and the image is right there, it's all there.
All the above is just my own individual perception, and I certainly don't expect anyone else to see things the same way. The requirements of photography/filming may very well be different to observation in the field - I know I have at times watched footage of landscapes that was probably filmed through flat-field wide-angle lenses, and thought what I was seeing felt a bit odd (possibly because the angle of view exceeded the "sweet spot" of sharpness of my own vision in a way that binoculars don't?). If you prefer, and spend a lot of time looking through those kinds of lenses as a film-maker, it's only natural that that preference and familiarity will deeply influence what you like in binoculars.
Anyhow, for what it's worth, I do enjoy reading Tobias's comments/observations even though (or even because) his perceptions are often different from mine, and hope his write-up comparing his various old porros will soon be online.
I, personally, don't really perceive the 3d effect others talk about when using porros, either. I do notice a difference, probably because of the wider set objectives, but that doesn't translate into an impression of greater three-dimensionality (not to me anyway). I'd actually have to say a roof prism binocular more closely matches what my eyes see - as you're looking straight down the barrels, as it were.
One thing I have noticed with porros - almost every one I have tried, from 8x30 to 10x50, I have needed more familiarization time to "learn how to look through them" - compared to roof prism binoculars where the image almost always seems to be much more accessible. With most modern roofs (and even older ones like Leitz Trinovids) I can put them to my eyes and the image is right there, it's all there.
All the above is just my own individual perception, and I certainly don't expect anyone else to see things the same way. The requirements of photography/filming may very well be different to observation in the field - I know I have at times watched footage of landscapes that was probably filmed through flat-field wide-angle lenses, and thought what I was seeing felt a bit odd (possibly because the angle of view exceeded the "sweet spot" of sharpness of my own vision in a way that binoculars don't?). If you prefer, and spend a lot of time looking through those kinds of lenses as a film-maker, it's only natural that that preference and familiarity will deeply influence what you like in binoculars.
Anyhow, for what it's worth, I do enjoy reading Tobias's comments/observations even though (or even because) his perceptions are often different from mine, and hope his write-up comparing his various old porros will soon be online.