In this respect it's probably safe from competitors.
Now... as to the design... by my calculations a focal length of 64mm and AFoV of 47.9 means the field stop is 53.5mm diameter. In my scope (250/3100) that gives a field of view of 1.0 degree and a 5.1mm exit pupil, which indeed would be quite nice.
At present I use a 2" 38mm SWA which has a field stop that gives about 0.6 degree, just enough for the moon plus a tad, and an antique 2" 30mm erfle of some sort. And I'll admit I do miss the 50mm LV. Star clusters looked like diamonds on black velvet.
OK... so some pics for you, apologies - I've set it up in my basement as the weather here is insane, either 39 C with bushfires or a wild southerly gale and overcast.
- OTA on the mount, under that Matthias Wirth lid is the most exotic soupbowl I'll ever own;
- Assembled with finder, diagonal and the 30mm erfle;
- The business end - focuser is a TS UNC 2" steeltrack crayford, built like a tank. I also have a motor drive for the focuser, but haven't fitted it yet. This thread is making me regret not getting the 3" version, but hey it's possible to retrofit it because the way Matthias has built the OTA is like a Meccano set, it is easy to modify.
In the third pic you may notice I have mounted the finder forward on a vixen dovetail - this turns out to be way, way, more convenient than having at the backend of the scope. With careful alignment of the finder and main scope, I can calibrate the mount in altaz mode well enough that GOTO's will put targets in the field at 200X so most of the time the finder isn't needed.
Edited by luxo II, 16 November 2019 - 12:51 AM.