id stick with celestron and meade. its hard to say which company is better but i say if you have the funds get AT LEAST a 8 in schmidt cassegrain telescope, anything smaller you will have a hard time seeing fainter objects under magnification (different eyepieces). ive had the meade etx90at and pretty much the only thing you can see super clearly is the moon. if there is a nearby comet, that too. and juptier is a white glowing dot, and you can juuuuust make out its moons. this small telescope couldnt do much. under higher magnification eyepieces, everything just got grainy and dim.
they have gps versions that set themselves up automatically to the north star. this is handy because otherwise you will have to set it up yourself if you want to use something like meade autostar to located stars at the press of a few buttons. drawback is this costs alot of money. i was looking to buy the meade 8" LX200GPS-SMT or the celestron nextstar 9 gps. gps is also again very handy because since the earth rotates you want the telescope to rotate with it to capture galaxies without blur. this can be done on a telescope without gps but again you will have to go through the preliminary setup of aligning it with the north star.
a very very sturdy tripod and mount is needed for long exposures as these telescopes are heavy. if the tripod isnt sturdy enough there are tutorials online to fill the legs with sand, etc
meade has an adapter, im not sure if it fits though, might want to call them or email them to make sure
be very aware that telescopes cost a huge bundle of money. and i dont mean $600 huge, more like $2000+ huge
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