TMB-92L or AT111EDT
Posted 02 January 2013 - 10:19 PM
Would the added 19mm of aperture from the Atro-Tech compensate for the lack of FL-53 glass of the TMB? I am purely using it for visual purposes and have no plans to ever do astrographic imaging.
Posted 03 January 2013 - 08:46 AM
Posted 03 January 2013 - 09:13 AM
Posted 03 January 2013 - 11:10 AM
For these purposes I would (and did) opt for the AT111EDT.
Color correction is "good enough" even for picky visual observers (like me!), the more gentle f/7 focal ratio will allow successful use of a wider range of eyepiece designs, and you will be able to notice a 17% aperture difference at the eyepiece. The 111mm scope gathers 31% more light. The eye typically can detect a 10% brightness difference and will find a 20% brightness difference obvious.
However, unless you're shopping used, the AT scopes are on back-order and my understanding is that Astronomics is in the process of switching suppliers for their scopes, so it would be good to ask for an estimate as to when the new 111EDTs can be expected and whether there will be any price and/or specification changes.
Posted 03 January 2013 - 12:46 PM
Posted 09 January 2013 - 12:19 PM
Posted 09 January 2013 - 04:48 PM
Posted 10 January 2013 - 03:22 PM
Posted 10 January 2013 - 03:56 PM
Posted 10 January 2013 - 04:36 PM
Posted 10 January 2013 - 09:35 PM
Posted 11 January 2013 - 12:35 AM
Posted 11 January 2013 - 01:46 PM
I think the price is nutters, given that when the new AT111EDTs arrive, they'll be priced less than this used WO scope, but...
Here's the lens shot (with the dust mentioned by the seller). See the deep green coatings?
Now take a look see at the lens of my AT111EDT:
Posted 11 January 2013 - 02:14 PM