By field of view you mean when looking through the eyepiece?This thread has lots of posts that make the idea of crop factor, much more confusing than what it really is.
Anyway, the green box refers to the APS-H sensor which gives 1.3x crop factor. APS-H sensor only by some Canon 1d series dslrs.
So crop factor, is just about the sensor being smaller than full frame(which is 36X24mm). As a result, the field of view or viewing angle, is less than what it is on full frame.
Don't believe? Go try it with your own eyes. Put your 2 palms next to your eyes. And obviously you can no longer see the stuffs at the sides.
What people like to say is sometimes misleading. Mounting a 100mm lens on 1.6x crop factor sensor DOES NOT turn the lens into 160mm focal length. No such magic. No such trick. No such good deal.
What happens is people often leave out is the phrase: field of view.
Look my friends, a 100mm lens on 1.6x crop factor sensor, gives you the equivalent field of view as that of 160mm on full frame. Which is to say, your view becomes narrower. That's all. Therefore, the objects in your picture, do not magnify. They do not become bigger. They remain as normal sized.
Using my 'palm-next-to-eye' example, you won't see things become bigger right? Do you? If yes, something's wrong
I think the above answers your question. No you don't see more details, because your subject won't become bigger in anyway. Also it depends on the number of pixels and pixel density. Number of pixels is associated with resolving power of the sensor.