Managed to take the RX80-L out to Toa Payoh Park on Monday evening. Though there was a full moon and the sky was very cloudy, I still managed to test it on Jupiter (it was nearly overhead and somehow in a
totally cloud free zone
), Sirius and M42. It had already passed the test on Saturn 2 weeks ago.
The image of Jupiter was quite pleasing at 140x with a barlowed 10mm Zeiss Ortho - the bands appeared sharp and contrasty, and a couple of small dark blotches on the bands could be resolved too. Chromatic aberration only started to become a pain when the magnification was brought closer to 200x with a single 4mm eyepiece. At 150x and below, it was still ok. Jupiter through the RX80-L was also noted to be not as yellowish as seen from other Chinese made 80mm short tube achromats.
Orion was beginning to set behind a building, but I could just manage to get M42 in the view. Low power, wide field views of the M42 region was also ok. No gross distortions of stars near the edges. All 4 trapezium stars were also nicely resolved at 30x.
Star test on Sirius was also ok : no serious inherent optical defects detected, only showing just a bit of off-collimation which can be fixed easily.
Hm, overall I'm quite satisfied with it, so I guess it's time to put the
"QC Passed" sticker on
RX80-L at the park
