NoRain Posted October 31, 2011 Share Posted October 31, 2011 HelloYes 1 more new guy here with lens question.I wanted to get the SW 200P from FLO but they would not send to Norway,so I have to order from Skywatcher Dobson telescope N 200/1200 Skyliner Classic DOBI think they are the same SW. My son & I want to look at Jupiter,Saturn most of the timeIs it better for me to get a 3x Barlow or will a 2x work just as good?And with the Barlow is it a good idea to get a EP 5mm-6mm.When we look at these 2 planets I want my son to say wowNot I am going to play wow.Thanks any advice will help Link to comment Share on other sites More sharing options...
rightguard Posted October 31, 2011 Share Posted October 31, 2011 your focal length is 1200mm. a 6mm ep will give 200x mag. i dont know what the skies are like in norway but in the uk ~200x is pretty much all we can go to becaus eof bad seeing. however if you have good seeing then you can increase this quite abit. a 2x barlow would give an effective ep of 3mm, which would give 1200/3 = 400x. unless you have perfect seeing conditions this wont be practial - it will just be blurry.an 8mm will give 150x. id go with a 5mm and forget about a barlow with that ep. however if you do have good seeing then it cant hurt to try it! be aware tho that a good barlow will only give the same quality view, whereas a cheaper one will degarde the image quality (more glass in the image train). saying that, i wouldnt go and spend too much on a barlow just incase you dont need it! Link to comment Share on other sites More sharing options...
NoRain Posted November 1, 2011 Author Share Posted November 1, 2011 OK thanks I will give this one a try Baader Planetarium Hyperion eyepiece 5mm. Some here say it is a good EP. Link to comment Share on other sites More sharing options...
Charon Posted November 1, 2011 Share Posted November 1, 2011 Welcome to the forum, Hyperions are a decent quality eye piece you will not be disappointed but a 5mm ? You will need good conditions to use it like rightguard has already mentioned, I would buy a 10mm myself. Then if you bought a 2x Barlow that would give you your 5mm. Link to comment Share on other sites More sharing options...
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