> NOWADAYS IS HARDER TO SHOOT LONG INTEGRATION TIMES WITHOUT GETTING ANY SATELLITE PASSING TROUGH THE FRAME
Satellites, cosmic trash or UFOs, the moving spots are everywhere on the sky. Typical satellite behavior is to reflect sun light. It should be yellow or white and could fade and shine due to its rotation. At Saturday I was trying to make a stack of 50 frames of 30 seconds of Horse head nebula. I was surprised that during the 25 minutes integration I could count around 7 satellites passing trough the field of less then a degree. One of the objects was spinning very fast leaving a doted line on the frame. Below is a single frame with 3 satellites passing at the same time in front of the horse head nebula. The lines are not straight due to the wind vibrations. I assume that those are satellites but in fact as I am not sure those objects are officially UFOs :)
On the Photo: Horse head nebula and Flame nebula. Single frame 30s, Penatx k-5, ISO 51200. telescope SW200pds, F1000mm, D200mm
http://www.deepskywatch.com/deep-sky-hunter-atlas.html This is an amazing resource. Detailed atlas of all the sky with NGC and IC objects.
Reading a new product that claims to be 100x time more powerful then conventional telescope, I realise that this is just an astrograph with a digital camera that is doing stacked images and show them trought eyepiece or App.
I am so impressed with the K5 ability to quickly gather signal from nebulas (Quantum efficiency) and galaxies, so I decide to take one more K5 and to remove the IR-cut Filter of the old one.
Recently I got one very good lens the Asahi Takumar 135mm 1:2.5. This is fast telephoto lens and from my point of view a good lens should be with aperture from 1:1,2 to 1:2,8.
Moon at 45% illumination and 70x magnification. With aperture of 200mm,14,1 stops dynamic range, color depth of 23.7 bits at this image there are slight color variation on the moon surface that reveals it’s structure.