Orion's 127mm Mak-Cass
Posted 30 June 2003 - 10:05 AM
On a night when 4 mag stars were hard to see by my eyes I was able to go to 205X with my 7.5mm ultrascopic on the Double Double and it was easy to come to a nice and clear focus. Rasalgethi (a colorful double star) in Hercules was very nice at 205X as well. I have this mounted on Orion's Skyview Deluxe mount and even at 257X it settles down quickly after focuser adjustment. This is a very easy scope and mount to move around. I highly recommend this scope. I can't wait to see Mars through it. Orion is running a web only special on this scope on a mount at the moment. Clear Skies.
Posted 30 June 2003 - 12:23 PM
I still think about getting a refractor sometimes (the diffraction rings can bury faint companions on tough doubles), but a good inexpensive achromat would be huge.... to big for the astroview mount. The Mak focuser does have quite a bit of backlash (and Orion said they would be happy to look at it), but SCT's seem to have the same problem. I wish there was an external focuser that I could buy for it. Guess I will have to make a fine focuser for it.
Posted 30 June 2003 - 12:33 PM
Was the backlash problem there from the start or did it occur after some use. I just got the scope last Saturday and last night was my first use of it and I did not notice a "backlash" problem but then I may need a definition of what backlash means. Thanks.
Posted 30 June 2003 - 01:12 PM
Posted 30 June 2003 - 01:25 PM
Posted 30 June 2003 - 01:27 PM
Mine seemed to be a little 'stiff' in the beginning, like the shaft attached to the knob was bent a little. Just tried it; seems to be gone now and going quite smooth..
Posted 30 June 2003 - 01:28 PM
Posted 30 June 2003 - 04:48 PM
Posted 01 July 2003 - 06:25 PM
And I noticed you like the Double-double, how would you compare that to the refractor?
Are the diffraction rings much more of a problem for faint companions? I want to know!!!
Posted 01 July 2003 - 07:10 PM
I've only been able to use the Mak one night so far because of weather and looks like for another week thanks to tropical storm Bill. The only refractor I will be able to compare it to is a 90mm f/11 Meade Polaris which is not a Chinese objective but probably Vixen made. Will let you know when the weather improves.
Posted 04 July 2003 - 09:50 PM
I also have a Stellarvue 80mm/720mm older scope which is not made now but is similar to the 80/9D model. I pushed it a little past its Dawes limit (195X) and it split the Double Double very nicely with a diffraction ring that was barely noticeable around the brighter one of each pair where the diffraction ring was very noticeable in the Mak at 205X. In fact, I returned the Mak because of this as I found the diffraction ring too distracting.
Posted 08 July 2003 - 10:53 PM
If anyone wants that Mak that Blair returned, Orion is selling it in the clearance section for only 424!
Posted 08 July 2003 - 10:55 PM
But it's still a great deal on the full mounted version!
Posted 09 July 2003 - 04:28 AM
Did you retrun you MAK, if so....why?
Posted 09 July 2003 - 07:32 AM
Posted 09 July 2003 - 09:27 AM
Posted 09 July 2003 - 09:36 AM
Posted 11 July 2003 - 08:36 PM
Posted 11 July 2003 - 09:09 PM
Posted 12 July 2003 - 05:15 AM
Later that night (around 02:00) I had my first views of Mars; they where disappointing due to very bad seeing conditions; high foggy clouding, but hey it's been-more-weeks-than-i-want since i last used my scope! Seeing Mars made me thinking about the motor drive too Robert.... i keep on spinning that wheel...
This reminded me to check the focus backslash issue. There is none as far as i have noticed. So i guess i was lucky or you just had a little bad luck with your scope Kent.
Kent; what article discribes this fix, i've no problem with it now but if i get a problem with in the future; what article describes this fix? I haven't stumbled upon it yet..
Posted 12 July 2003 - 01:37 PM
I did get a good view of Mars in the Mak last month, and it looked good, very crisp. Saw a large polar cap and the dark areas south of Chryse. I am having to learn Martian features now.... great fun!
Posted 12 July 2003 - 01:51 PM
This scope is no galaxy killer. But it does well on things that need a little magnification; planetary nebula and brighter diffuse objects are good, globular and diffuse clusters are very good (I think the resolution helps here). Of course, lunar/planetary is well above average, too. I would be interested in hearing your observations on this.
Posted 21 July 2003 - 08:17 PM
Posted 22 July 2003 - 06:08 PM
Posted 23 July 2003 - 08:17 AM
Got me just about the same views; i fiddled a bit with filters; really does help, you should try it.
Did not bother to watch Mars from a dark site until now; all backyard observing. I will try a dark location soon..