Meade Advanced Coma Free (ACF) question
Posted 08 November 2012 - 03:40 AM
Posted 08 November 2012 - 10:21 AM
a simple answer is YES the AFC optics are simply better then the standard optics.. no question about that fact at all..
The question you have to ask yourself is the AFC optics worth the extra money because on axis there is no difference.. the AFC opticx only do there thing at the edges of the FOV and I personally do not spend much time looking at the edges...
I own a CPC1100 .. mainly because I found the Lx90 12 inch scopes to be way-way under mounted IF I wanted to buy a 12 it would have to have been the Lx200 .. MONEY then became a big factor
The lx90 is fine with the 10 inch OTA BUT NOT with the 12..
Just my opinion
Posted 08 November 2012 - 11:39 AM
Posted 08 November 2012 - 01:41 PM
BTW, before you make the commitment to buy your scope ... read the recent CN posts on the quality control issues that have plagued Meade since the move to their new Mexican factory:
Posted 10 November 2012 - 11:26 AM
Posted 10 November 2012 - 01:23 PM
The 12" LX90 is not for everyone. I would be happy to have the LX200, but couldn't afford the extra $$$. I find the 12" LX90 to be...adequate...as far as the mount goes. You do need to make sure you don't hang on the focuser or bump the eyepiece when observing which is a good idea with any scope.
Posted 12 November 2012 - 10:14 AM
Is there anything about the traditional SC that makes it actually preferable to the ACF other than a slightly lower price?
The standard SCT has a 4" secondary mirror (33.3% central obstruction), while the ACF has a larger 4.6" secondary mirror (38.6% central obstruction)... (obstructions expressed as a percentage of the aperture's diameter, not area). This could be a factor when observing low contrast planetary features, however any differences would be very subtle ... but, that is what planetary observing is all about! It would be equivalent to the views between unobstructed telescopes of 7.9" (for the SCT) and 7.4" (for the ACF).
Posted 12 November 2012 - 04:55 PM
Posted 12 November 2012 - 07:13 PM
Posted 12 November 2012 - 08:43 PM
Posted 14 November 2012 - 02:43 AM
Posted 25 November 2012 - 10:26 PM