Quote:
Originally Posted by AstroApprentice
I recently acquired an old model u-250S and still have an old u-210. As Colin said, the 250 is much bigger, but if you have a tip-in saddle like a Rayox, then that can help make mounting easier. Both Mewlons are relatively big and require time to acclimatise thus making them more effort than a small grab & go refractor. I don’t think the 250 is much more effort to set up than the 210. Plus collimation with the three pairs of screws on the 250 is much simpler than the 210 with three screws only. The motorised secondary on the 250 is also a big plus over the 210. IMO, the 210 definitely requires a motorised Crayford focuser on visual back due to issues associated with moving the primary mirror. I also have one on the 250 for automated focussing as the 250S motor controller can’t be connected to PC/ASCOM, but the newer 250 controllers can.
The 210 is good quality, but the 250 is an improved design. Both give great views, but in use to date, I prefer the 250.
I mount both on Losmandy G11 - with the 210 I can use a short CW shaft and less CWs.
You’re likely aware of the lengthy discussion on CN of these scopes:
https://www.cloudynights.com/topic/5...nd-mewlon-250/ |
Thank you for the details Jason. I am aware of the discussion and Dr Who has had some valuable insights on some posts - the link you gave is the best one though and thank you for referring me to it again.
I do realise one thing I am a person with not a great deal of money to spend and I can scrape a Mewlon 210 but not the asking price of the 250. To be honest the M210 will be it for me. I have a Meade LX200 8 inch that I have enjoyed and spend time viewing through. I imagine the M210 is an upgrade on that and noting your motorised focuser point - do you have any suggestions on brand and model of motorised focuser?
Also what mount do you use? I was looking at an EM-200 Temma2M or 2Z if I can sell my other gear off, eyepieces, etc.
Many thanks to all for the help so far - advice is invaluable understanding limitations, pros and cons.
