First light with the 2" focal reducer

Around 9:30pm, I checked on usps.com the status of the package with the 2" FR (it was supposed to arrive Monday) and it said it had just been delivered. I found the box outside and decided to give it a try. The seeing conditions did not look as good as the previous nights. It looked grayer and there were occasional high altitude clouds.

I tried the 30mm spacer ring first and was able to achieve focus and calculated the FR to be 0.55x (making the telescope a f/2.75). With a 15mm spacing ring, the FR is 0.65x (making the telescope a f/3.25).

Unfortunately there was vignetting but more importantly it was difficult getting a good picture. After observing a few objects I removed the FR. Maybe it is time to do flats (I believe they could address the vignetting).

Observations:

M31 Andromeda Galaxy, M32 and M110 - ugly pictures (not uploaded here)
M45 Pleiades - with 0.65x FR - okay picture, adjusted brightness/contrast to make vignetting disk disappear
M33 Triangulum galaxy - with 0.65x then without
M1 Crab Nebula (no FR)
M42 Great Orion Nebula and M43 de Mairan's Nebula (no FR)
NGC 2204 Flame Nebula and IC 434 Horse head Nebula - Orion (no FR)
M78 Casper the Friendly Ghost Nebula- Orion (no FR)
C49 Rosette Nebula and C50 Open Cluster - Monoceros (no FR)