How to Use a Spotting scope for Astronomy 

Thank you for this most educational and entertaining presentation. Very helpful and very inspirational!

Is kowa 66 with TE11WZ II good enough for ASTRO viewing without zooming in?

SCT 6 has central obstruction (the mirror at the front covers some protions of the primary mirror) of 14% by area, and 9,25" has 13%, so not the whole aperture of SCTs should be taken for calculating light gatehering ability. The better for Kowa as spottong scopes use full front lens area. And reflecting several times the light ftom reflecting surfaces also causes light losses - sometimes by several percent. One advantage of bigger aperture is for sure better resolution. I am far from being an expert here but still, these are quite a valid points that one should take intio account when comparing equipment. Additionally another + for Kowa is very high contrast compared to obstructed optics like SCTs, Newtonians etc - Kowa wins hands down every time with mentioned here scopes in that department. Energy from central obstruciotion is pread out in to whole objective area causing the black sky background to became grey. Subjectively humans percieve it as an image of excellent quality. Good contrast does it's job here. So far on several star parties my Kowa 99A goes ahead of many many much bigger scopes regarding subjective joy of shown images. I wish it was better designed to accept astronomical accessories like binos etc...

Excellent presentation! Thank you! I definitely recommend any Kowa scope users to look at night sky - you will be amazed! Really these fuorite optics are insane!

Have to watch tomorrow, busy morning, so could not watch full video. I do a good lot of digiscoping with my phone, but its mainly videos, because of shake (blurring) on pictures. Where as the movement in the video do not cause this problem How can i overcome this problem.

This is to Robert... :D Your background image has stars with spikes - they were not photographed with Kowa scopes for sure. :D LOL Details that sometimes matter :)