Hi all,
Thanks for all your responses....
Reading elsewhere in the forum it is said by many that 200x is the limit in terms of visual magnification.
But after reading an article about mars in Sky & Space Megazine (October issue) it said that for larger scopes we should try an get 300 to 400x magnification for observation.... this kinda of contridicts the 200x is the max rule... can anyone shed any light on this for me?
As for eyepeices,
what do you think of the following setup? (I have a 12' DOB, with FL 1500)
Option 1
1)Meade 5000 6.7mm 15mm eye relief with Orion Shorty Plus Barlow which should give me 447x magnification.
This will set me back $385 from Bintel.
Will this work to see the details in mars? (instead of a round orb of light like I am getting now.) will the meade eyepeice perform well with my GS dob?
Option 2
2) Andrews Ultrawide 2' 12mm, 80 FOV eyepeice. (Don't know what the eye relief is yet....) with a Andrews 2' Barlow at $79. This should give me 250x maginification.
This will set me back $298 from Andrews.
The only thing with this is that it is not 400x magnification liek option 1 and I am unsure of the quality of the barlow and the eyepiece.....
Sky and Space megazine said 300x to 400x should be good viewing for mars when it peaks in late october... but I am worried that if I spend $385 and realise that I can't make use of the magnification that all that money would be down the drain... which option should I go for (or perhaps none of the above, you can see a better option) and why? pls help.
|