Image of the day

Captured by
John Roach

Enhanced Uranus showing Polar Cap and possible Aurora

My Account

New to Astromart?

Register an account...

Need Help?

Light Cup Mars visual magnification and sizes

Started by ronbee, 10/31/2005 06:19AM
Posted 10/31/2005 06:19AM Opening Post
Many observers new to Mars or getting a new telescope for the first time often asked the question: what does Mars look like under various magnification? While there are some software simulation around the internet, I've not found one that is a true representation of the magnification. Well going by the eyeball ;-), my Light Cup and I did a visual estimate right at the eyepiece with the photos in from of us.
http://users.adelphia.net/~ronbee/mi/Mars/MarsVisualSizes.jpg
Beware that many of the resulted magnifications are not useful visually through small telescopes!

With Mars now just passing its closest approach and getting to opposition for the 2005 apparition, I hope you'll find this useful.

Enjoy,
Ron B[ee]

PS - The experiment was also educational for me. I was quite shocked at what sort of magnification imaging provides
Posted 10/31/2005 03:31PM | Edited 10/31/2005 03:32PM #1
Ron,

Two weeks ago when the moon was very close to Mars, I was able to look at Mars at 133x straight through my refractor with my right eye, and open my left eye to see the moon at the same time. They appeared close to the same size. In fact, I tried to cross my eyes to bring the two images together, but my brain rebelled - I could not see a 3D view!

Rick

8" Zhumell Dob
90mm f11 achro refractor
4-1/2 f4 rich field newt reflector
Posted 10/31/2005 06:37PM #2
Not bad.
Seems to agree reasonably well with what I see at the eyepiece currently.
But, of course, it won't look this way at every apparition.
Larry
Posted 11/03/2005 08:28PM #3
Ron,

An excellent lesson for us all as to the size of Mars at various magnifications. Thank you for sharing it with us all.

Carlos