Quote:
Originally Posted by stebai
Hi folks,
I bought my wife a BT202 Dob last year for X-Mas and we have had some fun with it. She in particular was excited by viewing Jupiter and Saturn for the first times, and we have spent much time enjoying the wonders out there. Well i for one hate late X-Mas shopping so i start early, infact today.
As mentioned already planetary viewing is the most exciting astronomy for us both but our Dob doesn't quite cut the mustard when it comes to viewing the rings on Jupiter. We can just about make them out but they are kind of vague. She thought a higher powered eyepiece might be the answer (we have a 9mm that came as standard) and a bit of research revealed a 6mm existed.
However on visiting my local Bintel we were told that a Barlow lens would be preferable as the 6mm generally were very difficult to use (infact i was told they no longer are stocking them.) So i took advice and bought the Bintel Barlow 2x ED (2"). I also bought a Nebula filter (which i think is the same as a light pollution filter???) and 4 coloured filters (Yellow, Orange, Med Blue and Green).
My main problem is that i won't be able to use them until X-Mas and i wanted to know if the items i have bought will make a useful difference to the size and clarity of the planets mentioned.
I know this is dumb but will using the 2x Barlow make the image twice as large? 
Also can you use a coloured filter with the Nebula filter? (i forgot to ask instore.)
Many thanks to any who reply. |
You should be fine, the barlow will indeed make the image twice as large, yet that maybe to high magnification with a 9mm. As in you may be now be only viewing the rings of jupitier, not a more clarified view of the planet.
I would be under the assumption, that a more expensive 9mm might be more appropriate.
Do you know what brand the eyepiece is? I believe a $200 9mm would bring out the rings.
Then again, I am only new to this, so I would wait for someone more experienced to reply.
