86824Re: [lx90] Moonlite focuser
- Mar 20, 2014I'll pitch in a bit. I have installed the FTM-M80 (replacing the Meade microfocuser for the same reasons - it was hitting the base of the forks when imaging to the north). I am still having mirror shift issues but not as badly - possibly because I moved the mirror back and forth all the way in and out a time or two. Getting the original focuser off was a bit tricky (more because I was afraid to break something) but getting the new one on and secured was easy. I have used it only once since installing it and it worked very, very well.
Like I said, I have only used it once since installing it and was pleased. I don't think one use is really enough to make good call on the mirror shift issue - I plan to use it a bit more when the weather permits (that's kind of a joke here in the Seattle area) ...Hope this helps. All in all, I'm very happy with the focuser thus far.JimOn Thu, Mar 20, 2014 at 7:51 AM, Dave Altwies <davealtwies@...> wrote:John,I just went to my email and your message came in while I was looking at other messages.I think, because I am a visual observer only, mirror shift has never been a big concern for me. Although I have seen mirror shift, the object never shifted out of the field of view probably because I usually use a 17mm 68 degree eyepiece or a Mallincam Extreme camera with a focal reducer for video aided viewing. I am not an expert in there areas, but I believe mirror shift is more of a concern for imagers. I have been told that the FTM-M8 will reduce mirror shift, but I cannot verify that.You can get the installation directions for the FTM-M8 at http://starlightinstruments.com/store/image/data/PDF/Meade%20MicroFocuser.pdf I had a little bit of a problem getting the old focuser off the mirror holder rod shown in step 2. It took a bit of wiggling but I did get it off. I did not have any problem putting the new focuser on. The new focuser comes with a DVD that is better than the pdf on the website.I set the scope upon the back porch in daylight. The focuser was very smooth and the 10:1 vernier allows very precise focus. I think this is a good compromise. I found not being able to reach zenith a real pain in the @%$.Regards,Dave AltwiesLake Geneva, WIFrom: tirnoney35@...Sent: Thursday, March 20, 2014 9:12 AMSubject: Re: [lx90] Moonlite focuser
Thank you for your reply to my question about a Crayford type focuser.
I am undecided between replacing the stock focuser and going for a Moonlite focuser that screws into the visual back. I am troubled by mirror shift. Does the FTM-M80 Micro Focuser reduce mirror shift significantly. Did you have any issues replacing the stock focuser? I want to gather as have as much information as possible before making a purchase.
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