looksharp65
Well-known member
Last summer I tried to approach the AFOV concept in a new way.
http://www.birdforum.net/showthread.php?p=1892964#post1892964
The result might be named "PFOV" for Perceived Field Of View. It has also been called transparency or walk-in.
To me, it's very obvious that AFOV does not tell everything about how the view through binoculars feel. Some of my ideas in that post are not correct, and I'm still trying to find out all the factors that promote the walk-in experience.
At present, I believe those are:
1) Sleek design of the housing, eyecups and barrels
2) Large ocular lenses + thin rim around them
3) Great eye relief
4) Eyecups collapsed
5) To certain extent, AFOV
In the next post, I've made a simple illustration.
http://www.birdforum.net/showthread.php?p=1892964#post1892964
The result might be named "PFOV" for Perceived Field Of View. It has also been called transparency or walk-in.
To me, it's very obvious that AFOV does not tell everything about how the view through binoculars feel. Some of my ideas in that post are not correct, and I'm still trying to find out all the factors that promote the walk-in experience.
At present, I believe those are:
1) Sleek design of the housing, eyecups and barrels
2) Large ocular lenses + thin rim around them
3) Great eye relief
4) Eyecups collapsed
5) To certain extent, AFOV
In the next post, I've made a simple illustration.