Eric…. Here’s a few reasons I went for the Yeti1500x… First tho, I want to mention: At the time of the 1500x purchase I was considering building a LiFePO4 based supply but there were some

If you go to the strain wave manufacturer, they publish the specs and they are twice that high. The published specs are of course the max allowable, and typically they could be better. Rolando

The tracking error graphs were published by ZWO on their website. ZWO has not published anything about periodic error correction.

Take an image, turn tracking off for a moment while the image is exposing. The resultant trail will be in the RA direction. Rolando

On Mon, Dec 27, 2021 at 11:17 AM, Roland Christen wrote: Can you repeat the meridian flip with modeling turned off? Also, in which axis is this happening? Also, can you run a 5 second image after

Roland, Thank you for those details. I find all of the mount discussions both interesting and educational. Regards, Eric

About $2k for the batteries, inverter and 200w solar charger. You can use one 100Ah battery and a smaller inverter as that would handily operate 2 rigs. I'm sure someone will say just run it off the

Forgot one thing: these strain wave gears are not made with stainless steel and the flexible cup gears will eventually rust out. Rolando

With a strain wave gear you can correct the average periodic error to some extent. Problem is that one PE curve does not fit all the errors because the error is a variable from one tooth to the next.

Wow what does a battery setup like that cost? -- Brian Brian Valente portfolio brianvalentephotography.com

Hello again In SGP, once I have unparked the mount ,the Current telescope's position displayed from the Software does not match the reading of RA/DEC from the ASCOM driver, especially in Longitude?

While often my dark sky imaging involves camping, so this is definately overkill, but I parallel 2-100Ah LifePo batteries and a 2000w inverter that I leave in the truck. Then run an extension cord to

How many arc seconds was each pixel? Rolando

The specs for the high end strain wave gears list the periodic error as being 90 arc seconds max. So it's possible to get that large an error, although most might be less. However, it's not the max

One problem with very fast guiding is intermittent loss of guide star due to very short guide exposure. Some places you might get bright enough guide stars for a .5 sec exposure. Other places you

Jeff, Out of curiosity, do you find the 1500x to be a bit overkill at dark sky sites for a night of imaging, or are you exhausting it down quite a bit? I do well with a pair of AGM 12V batteries in

Can you repeat the meridian flip with modeling turned off? Also, in which axis is this happening? Also, can you run a 5 second image after meridian flip to see if the stars are round with modeling on.

Hi Ray, both Curent site and Mount RA/DEC are now synchronized thank you very much Phil60

True. I now use a GoalZero Yeti 1500x at dark sky sites, and also at home. It’s about the size and weight of a car battery (I move it on a furniture dolly). This replaces 4 deep cycle

That's very nice. Rolando