Long Perng 0.6 Reducer/Flatener for my Long Perng 90?

[Ags]

I use an ASI 485 MC, so I only have a small 6x11 mm sensor. That's a bit too zoomed in with my 500 mm focal length Long Perng 90. For example, stars are a little big with the fast apo, but as the overall image is quite small due to the sensor star size is exaggerated. I am considering of getting a Long Perng 0.6 Reducer/Flattener to shoot somewhat wider vistas. Not sure if the reducer would work in an f5.6 scope?

[Ags]

Anyone?