•FSQ-106ED New “Q”............[with ‘Captain’s Wheel’]
•FSQ-106EDX (I, II, III)......[without ‘Captain’s Wheel’]
Note: Discussion is more about FSQ-106EDXIII; also would like to know more about I, II, III specs and other details/differences. Pictures of your imaging setup & experience with adapting the ‘III’ to your needs are welcome!
•Comparison of old FSQ and New "Q"...
Here is a relevant quote from OPT... “Remember, the "EDX" version of the FSQ-106ED is the same as the "New Q", but comes with different adapters so that you can attach a camera rotator out of the box. This adapter cuts out 25mm of back focus (178mm vs 153mm) making the EDX much more suitable to photographic use. Adapters for visual use are available.”
Relevant Specs of 106EDX:
•Modified Four Element Double ED Petzval
•‘Reduced’ 153mm back-focus
•88mm image circle
•Accepts new F3.6 focal reducer
•Built-in camera adjuster capable of lifting up to 11 pounds
•4” rack and pinion focuser
•NO ‘Captain’s Wheel’
•530mm FL, f/5
To kick off the discussion, following are some relevant quotes from the DSLR forum....
@hytham, what’s the difference between FSQ-106EDX and FSQ-106ED?
The EDX is modified for imaging purposes.
The EDX comes with a built in CAA which reduces the amount of back-focus from 178mm to 153mm allowing you to attach a variety of adapters to suit your imaging needs, but does not have the captain's wheel or visual accessories associated with the FSQ-106ED. The purpose was to eliminate any potential flexure in the imaging train with the new casting design and increase the maximum supported weight.
Thanks for the info; couple more questions:
1. Is there any difference between EDXIII & EDX?
2. Is CC/FF still needed with EDX?
3. How good is the focuser on EDX; can/should it be upgraded to Feather Touch, if yes which one exactly?
If you can post a pic of your EDX, especially the back-end setup, that will be great. Thx
To answer your questions:
1) Yes. Heavier casting design for larger imaging trains. The ED, EDX(I,II,III) can all be used visually, but the progression (again from research and what I have been told) from I - III is the support of larger imaging trains. The III can support 5kg (11 lbs). They're all the same cost, so why not go with the EDX III imaging system instead of the ED was my thought.
2) From the images I have seen produced with it. No. The optics from the ED to the EDXIII are still the same. The quadruplet is supposed to eliminate coma and creates an impeccable flat field right out to the edge of the viewing/imaging area - it's crazy sharp. After using it at a friend’s house to try it out for myself, I was amazed by the beautiful quality of the optics and how clean it was. That is what convinced me to get one. The quality of glass and engineering.
3) No need, IMO. It comes with a 10:1 focusing system that is very smooth with great precision. Those that do upgrade it, want to motorize with the Starizona system whereas the Robofocus can also provide you with the necessary precision with the stock focuser. IMO, it's a matter of subjectivity.
Here are some photos of another individual's set up which is going to be very close to what I will have. Mine is in transit (should be here this week) and don't have all the necessary gear - still deciding on CCD and need to buy the right parts to connect the DSLR.