Howdy folks. Just my curious nature again. I'm considering the purchase of a Correct Image amici prism diagonal. The correct image part is desirable but I want to understand a bit more before investing some serious $$$ in a quality piece.
I understand how using a 2" diagonal allows for a wider field of view and better illumination of the field. I'm assuming it's due to the mirror's increased area for reflecting light and this is beneficial for 2" EPs which can utilize it.
But how does it benefit 1.25" pieces? I'm trying to grok how a 1.25" mounted in an adapter in a 2" diagonal benefits from a larger mirror. My widest aFoV is 68 degrees with my working set at 62. Again, my assumption is that a 1.25" is only going to allow so much light due to it's decreased barrel and field stop(?) diameters.
In other words, if one isn't using 2" EPs, if there any reason to use a 2" prism with an adapter when a 1.25" will do?
Cheers and thanks.