whatthedragon

Did you ever find one ?

On 14/04/2022 at 12:05, Dr Strange said:

You may be lucky and get a good one, or you may draw the short straw in the a***hole lottery and get a rubbish one...

lets say I grab one of these new mounts, what can I do to measure the amount of SDE error, is there some kind of written test I could do in a more controlled environment (in-doors) or just use it and if it works great > leave it at that?

I currently own there cheaper CEM26 and it works pretty well. I am shooting wide field. I was looking into getting a new mount that can handle a higher payload. Any Suggestions as what you use ?

I did hear back from two people at iOptron Corporation,

The EC represents our mounts that have a high resolution encoder that
monitors and adjusts the mounts tracking rate. This system delivers the
highest tracking accuracy to the point where guiding is no longer necessary.
 

and 

EC indicates that the mount has an high precision optical encoder system on
RA axis which will provide PE<0.25 arcsec rms. As a comparison, the standard
version has a PE of <14 arcsec pp.

another example .

RST-135

http://www.rainbowastro.com/rst-135/

vs

RST-135E

http://www.rainbowastro.com/rst-135e-feature-eng/

Does anyone know what the EC stands for and why it's 1k + more  in the whole iOptron line of mounts? \

In fact I think I have seen the EC on the title of other companies as well and they are more $$ too

CEM40

https://www.ioptron.com/product-p/c401a1.htm

vs

CEM40EC

https://www.ioptron.com/product-p/c404a1.htm