Finally Rob sold his two telescopes lately and got a new one.
I am not sure from the deck how much we can see stars, but there is a nice spot in walking distance in Sellwood, we are planning to look for starry night!
For the test, we pointed the telescope to a bird that was quite far away. I took photo of the bird which was on top of an electric pole. Then I took photo of the bird with the telescope. The result was far better than previous telescopes! Rob apparently made a happy choice for this one.
However we could not much test the stars at night because of clouds. We are waiting for a clear night.
In the photo underneath the bird, I used Sony Alpha 65 with Sony SAL-1680Z 16-80mm f/3.5-4.5 Carl Zeiss Vario-Sonnar T* DT Autofocus Lens
Advanced VX 6″ Schmidt-Cassegrain Telescope
Optical Design Schmidt-Cassegrain
Aperture (mm) 150 mm (5.91 in)
Focal Length 1500 mm (59 in)
Focal Ratio 10
Focal Length of Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification of Eyepiece 1 75 x
Tripod Adjustable, Stainless Steel
Tripod Leg Diameter 2″
Highest Useful Magnification 354 x
Lowest Useful Magnification 21 x
Limiting Stellar Magnitude 13.4
Resolution (Rayleigh) 0.93 arc seconds
Resolution (Dawes) 0.77 arc seconds
Light Gathering Power (Compared to human eye) 459 x
Optical Tube Length 16″ in (406 mm)
Optical Tube Weight 10 lbs (4.54 kg)
Tripod Weight 18 lbs (8.16 kg)
Weight of Counterweights 1 x 11 lbs
Mount Height (Max) 64″ in (1626 mm)
Mount Height (Min) 44″ in (1118 mm)
More info at the website: http://www.celestron.com/astronomy/celestron-advancedvx-6-inch-schmidt-cassegrain.html