I heard the William Optics flattener for the FLT132 works well with the TMB130SS. But I have seen no confirmation tests on that plus it's a $500 gamble to find...
M16 taken with the 130/780 using the APM dedicated field flattener. Once collimated, it does a good job. This image is only 70 minutes of data with a modified...
Sorry again, Terry. Try this one - http://tinyurl.com/3wbjks or this one to try and get some information - http://tinyurl.com/53ez54 Hunter ... please? VBG ......
Hi all Well I finally managed a clear night with almost uninterupted imaging from 10am to 6am (that is enough of the boasting for now), following on from my...
Bill, A telescope lens is made to focus at infinity. Focusing at 32 feet with a telescope of this size introduces spherical aberration. If you want this test...
Steve, this test has advanced quite a bit since this post. Todays test, with NO .85FR installed, I moved to 40ft since the true fl surfaces.... I shot the...
... WG: Steve, I've looked through some very nice ETX's but Questar has optics custom made by Cumberland to 1/50th wave rms or about .95 strehl intensity....
Wayne, I have owned two Questars and this ETX is better optically than either one of them. I just sold another ETX that was also very good to a friend of mine....
Hi Since posting my image of the "Crescent nebula in two flavours" I have had a go at reprocessing it using a slightly different method to before, this tme I...
... WG: Steve, I'm not saying it can't happen, just that: A). If you had Questars that bad, I would have returned them. B). If you have an ETX that good,...
... than ... good ... that it ... latitude ... ETXs ... Looking at ... clear ... 6 ... and ... and ... don't ... I had ... flawless. ... A. I bought both...
... Steve, I've heard other stories of poor optics in a Questar, and one was a 7" (tested on an interferometer). For the price, the optics should be above...
... a 7" ... be ... might ... Alan, I agree completely. I have tested a number of 3.5" Questars over the years and several have had bad optics. Markus Ludes...
... One issue that works against both the Q7 and the Quantum 6 is that they are rather massive, and can store a lot of heat. I had a Quantum 6 here for...
... WG: You bought them used, but from who? Private owners I assume? Didn't Questar offer to replace the optical set if they were defective, or at your...
... I ... that ... assume? ... defective, ... myself. ... another ... imitation of a ... optics ... theirs? :-\ ... started ... scopes ... Wayne, I bought...
... over ... 50th ... compared a ... vanished. ... Q7 ... Questar ... on ... Company ... they ... 6 here ... 4, ... owning. ... Alan, I think that at least...
Due to a serious family illness situation, I can no longer devote the time needed to moderate the group. I would like to ask that anyone who would like to...
Hi All I had a go at this a while ago on a cloudy night just using Ha and as it was clear tonight (up till 2am anyway) I thought I'd have a go using the SII,...
Gordon, Nice result! Your filters and chip must be very clean; I see no evidence of dust on the images, perhaps the narrowband filters is blocking the dust...
