Regular binoculars are usually not real good for day long glassing for animals. The bigger the optics the less eye strain you will develope.
Normally the type that are tripod mounted are the ones used the most.
There are many types of optics used, from the WW2 Military German and Jap to those we put together ourselves. We take two of the Bushnell Spacemasters, the Kowas or the B&L Turrets and put them in an adjustable bracket. I believe I have put together at least 40 sets of these over the years.
If the pics make it, you will see what is used the most.
[ 02-09-2002: Message edited by: Darryl Cassel ]