Mewlon - why not?
Posted 05 March 2004 - 06:33 PM
Wanted to get people's thoughts on these - how are they optically, what are they like to lug around, how do you mount 'em? Any cons to these? How they do versus an SCT or Refractor?
Posted 05 March 2004 - 06:37 PM
Posted 05 March 2004 - 09:39 PM
Posted 06 March 2004 - 02:21 AM
I guess it does have a couple of disadvantages compared to refractors. Its secondary is supported by four spiders so you get diffaction spikes, just like on a Newtonian. The Mewlon 210 focuses by moving the primary so there is some image shift, like most SCTs. Also with the 2415mm focal length it can get a little claustrophobic - again, just like a SCT. But since an 8" Mewlon costs about the same as a high-end 4" APO, I'm willing to overlook these minor quirks.
By the way, take a look at Suk's web page. He has some spectacular solar and planetary photos taken with his Mewlon 250.
Posted 09 March 2004 - 11:12 AM
Posted 10 March 2004 - 12:17 AM
You're right, if you are comparing Mewlon vs. refractor at the same price point, the Mewlon needs a larger mount. But if you are comparing the two at similar apertures, the Mewlon is much lighter than a refractor. The Mewlon 180 is only a pound heavier than the FS-102, and a couple of pounds lighter than the FS-128.
Mewlon vs. refractor wins on the apeture per dollar scale, but you'll need a bigger mount to hold it.
Posted 10 March 2004 - 03:55 AM
Ken, if you don't mind, how do you say "collimation" in Japanese? Is it just spelled out in kana? For some odd reason, I always thought there was a word for it. Thanks very much!
Posted 10 March 2004 - 06:57 AM
Posted 10 March 2004 - 01:45 PM