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AstroNtinos

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Posts posted by AstroNtinos

  1. 13 minutes ago, Astrid said:

    A catadioptric (mak, schmidt-cassegrain), Especially the Mak127 will be amazing for the planets and the moon, and quite ok for deep sky too (but not suitable for astrophotography because of the long f/10-f/11 focal ratio and small field of view). It is very portable and doesn't need as much maintenance (collimating, cleaning); so definitely good if you're living in a city and have to transport it etc etc. But they are kind of expensive so the only one that'll fit in your budge is the Mak90 or perhaps the 127 if you stretch your buget a bit.

    A refractor will be good for the planets and the moon, but you'll need big apertures (diameters) in order to see good things. And they can get pretty bulky and heavy (and have a problem called chromatic aberration that appears kind of like a halo around the object). 

    An apochromatic refractor (APO) has another set of lens that correct those aberrations. They are kinda expensive unfortunately and not good for visual observations (but great for AP).

    So that leads us to the last type, the reflector/newtonian. I just ordered for myself a Skywatcher 150/750 on an EQ5 (it cost 500 euros); Because of the limit of the EQ3-2 mount, in order to be able to do astrophotography on it I had to invest a bit for an EQ-5 mount, but if you only need it for visual observations, the EQ3-2 won't be a problem (https://www.firstlightoptics.com/reflectors/skywatcher-explorer-150p-eq3-2.html).

    Then there is the Skywatcher 150i Wifi (this one is the same OTA (tube) as the 150/750, but on an alt-az computerized , but costs a bit more) https://www.firstlightoptics.com/reflectors/sky-watcher-star-discovery-150i.html 

    And another great one is the Skywatcher 130P or the Skywatcher 150PL on either an alt-az or eq mount ( the PL has a bigger focal ratio, f/8 if i'm not mistaken, which means it is extremely good for planets and ok for deep sky).  

    Another great choice would be either a 6inch or 8inch Dobson. A dobson is a newtonian OTA (tube) on a dobson mount. Those are generally cheaper and good for both planets and deep sky, but not for astrophotography and are usually not computerized. https://www.firstlightoptics.com/dobsonians/sky-watcher-heritage-150p-flextube-dobsonian-telescope.html https://www.firstlightoptics.com/dobsonians/skywatcher-skyliner-200p-dobsonian.html https://www.firstlightoptics.com/dobsonians/skywatcher-skyliner-150p-dobsonian.html

    Unfortunately, with 300$ you cannot get a Go-To mount, planets and deep sky (you'll have to stretch your buget a bit). The 1.5 months of research I did in order to find the best telescope for my needs taught me that lol =)).

    In conclusion: I'd say go with the 200 (8inch) Dob if you only need it for visual. The good thing is that if you're deciding on starting astrophotography in the future you can buy a used EQ5, EQ6 or even HEQ5 mount. You can modify it and install a computerized system yourself (I know some people that did that). The SW 150P, 130P or 150PL are great too, but you'll need to stretch your buget a bit, and I don't think you need an equatorial mount for visual observations.

    Hope this helped!

    Thanks Astrid. It helped a lot.

  2. 33 minutes ago, Peter Drew said:

    I was thinking of a new 6" Dobsonian or preowned 8" Dobsonian.  Either would meet your visual requirements.  Neither would have goto, so what!, the objects are in the same place whatever means are used to find them.  Learning one's way round the sky is one of the most satisfying pursuits.    🙂

    You are right, but there are some objects that they can't be seen with naked eye, despite the fact that you are in the black light pollution zone. So I need either an equatorial mount so i can find the object through coordinates or a GoTo for automatic tracking.

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