C11, Orion 8in F/3.9, or XT8 on Atlas + SSAG + Orion StarShoot Pro V2/Meade DSI II Pro [or ES 82* 24mm, 11mm, 6.7mm] http://www.flickr.com/photos/95673005@N06/
Quote:I was curious if anyone using Samsung or Lodestar camera has tested how much shutter time or integration time to get equivalent to eye using the same aperture. For example, if using a 12" aperture and eyes may see slight arms from M51. How much integration time would be required from your video cam? Thanks to all who have tried and share your info!
Nytecam 51N 0.1W Meade 30cm LX200 astrograph+C8+Ha+CaK PSTs+spectrographs SX M9+Lodestar-C+M CCDs/Canon 1100D DSLR My Meade astrograph-colour deepsky My supernova discovery My dome build/spectroscopes/DSO images/Lodestar colour images & videos
Quote:Ntecam, thanks a lot for your photos and experience sharing. That was exactly the information that I was looking for!! Your M51 comparison, optics details, and NELM are great demo for others to get some idea to extrapolate what we may get with astrovideo. Currently, I felt severely limited by my eye, 8" Dob, LP, and from-time-to-time moon light. M51 is my current reference to gauge possible improvement. The east side of my driveway has NELM of about 3~4. So it seems that the Samsung SCB-2000 will not help me to get your 20-sec M51 with my 8" Dob. That pushes my decision to the Lodestar C. You have been a great demonstrator of that cam. Can this Lodestar be inserted in focuser just like normal 1.25" eyepiece without any additional adapter?
Quote:Jim, that was a nice shot from a NELM 5 sky. What was the integration time?
World Explorer, Satellite Development, and all that...
LX850 & Astronomy blog: http://lx850.tumblr.com
Ok, equipment list…for reference purposes only!
…Missing my RV-6. Why oh why did I sell it?!?!?!?
Quote:Well yes true Glenn except, and as the last sentence points out, the bigger telescope also collects a lot more photons and hence see dimmer items....
Quote:Thanks for your interest. Which of my four pics posted does M51 seem like in your EP?
Quote:Quote:Thanks for your interest. Which of my four pics posted does M51 seem like in your EP? I realized that I have never answer this question. Compare to Nytecam's photo, two nights before clouds came in I had quick peek through my XT8 when M51 was close to zenith. Still, through my eyepiece, the M51 and its companion were just two cloudy disks without much hint of arms. So it was equivalent and slightly less detailed than the 1-sec integration from Nytecam's 12" and Lodestar. However, that was with a NOT-dark-adapted eye sine I was working with my newly acquired Lodestar. The light from computer really destroyed my dark adaptation. The good thing now with my XT8 on Atlas, I can get 1-min exposure with good detailed arms structure from M51. But I made some mistake during saving the image to TIF so I ended up with no picture to show. And the clouds came.