Return to the Cloudy Nights Telescope Reviews home page


Observing >> Solar System Observing

Pages: 1 | 2 | (show all)
azure1961p
Postmaster
*****

Reged: 01/17/09

Loc: USA
Re: Visual Observation Illusions new [Re: dscarpa]
      #5920530 - 06/14/13 12:38 PM

I nice testimonials to target/aperture. Both Neptune and Uranus are particularly unforgiving of smaller apertures. Neptune at 350x through my C6 is not at all as nice as through my 8" and at least at 350x in that scope.

Venus Ive learned not to bother with if not for seeing issues than notorious fertile ground for optical illusions. I still look now and again, but its tempered with a lot of respect for its magician like nature.

I'm certain beyond a shadow of a doubt if some one images the number 5 on Venus in photoshop, and pushed it as real - you'd have a line of folks with number 5 drawings of this planet.

Pete


Post Extras: Print Post   Remind Me!   Notify Moderator  
bassplayer142
professor emeritus


Reged: 10/03/11

Loc: Michigan
Re: Visual Observation Illusions new [Re: azure1961p]
      #5920532 - 06/14/13 12:39 PM

Interesting topic. I believe the only answer to solving this is more aperture!

Post Extras: Print Post   Remind Me!   Notify Moderator  
David Gray
sage
*****

Reged: 08/06/12

Loc: Co. Durham UK
Re: Visual Observation Illusions new [Re: azure1961p]
      #5920671 - 06/14/13 02:08 PM

Too much going on with me at present so can't get too involved with this. A worthwhile thread which details many of the pitfalls that an experienced observer should constantly address, to the point of it becoming second-nature/automatic.

Venus: what concerns me with some drawings I see of this planet's diaphanous features is when they are executed under reported seeing conditions that can even render Jupiter's features challenging - i.e. such as IV-V seeing! As I have alluded to here: http://alpo-j.asahikawa-med.ac.jp/kk12/v121019z.htm
Likewise with Uranus!


Post Extras: Print Post   Remind Me!   Notify Moderator  
t.r.
Post Laureate
*****

Reged: 02/14/08

Loc: Upstate NY
Re: Visual Observation Illusions new [Re: David Gray]
      #5927097 - 06/18/13 09:34 AM

Perhaps a little authoritative knowledge about the human visual system can help drive home the point of illusions and in particular, human variance...

https://www.hf.faa.gov/Webtraining/VisualDisplays/HumanVisSys2a.htm


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
1 registered and 5 anonymous users are browsing this forum.

Moderator:  Rich (RLTYS), star drop, dr.who 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 1141

Jump to

CN Forums Home




Cloudy Nights Sponsor: Astronomics