The iTelescopes offer a variety of FOVs, some similar, some very different. Each of these FOV's are listed on the Telescope page, under the specific telescope link (T3, T30, etc.)
The best scale for each telescope from iTelescope is given via https://telescopius.com as follows:
- At the top right, enter the desired object name e.g. M42 for Orion
- Scroll down to the Telescope Simulator and click on the iTelescope icon
- Click on the downtown menu shown, this will open up all telescope choices
- Click on the specific telescope of interest. In this example we will click on T12 The filed of view of 3.9 x 2.6 degrees is displayed. This can be done for any telescope and also the background object can be moved.