I doubt the 9VR is up to the task of splitting e1 and e2. You can do it visually with a quality optic, long focal length 60mm but I think the CA would make it impossible with the fast little 9VR. Can you do it visually with that scope? If so, I'm impressed. Currently, the axes of the two doubles are at a noticeable angle to eachother. I can't detect any elongation that indicates that spatial pattern over the blooming of each in the image. Did you try it (imaging e1 and e2) with the 3" F16 Tasco you had set up during the session?
OK, I am back to followup on this topic. Just briefly:
- Yes visually I can split Epsilon Lyrae 1-2 with a Tasco 9VR. While with a TV 2X Barlow and extension tubes the image gets excessively soft for me, simply at 75X with a nice 1.25" University Optics OR 4mm I have and a Baader prism diagonal the separation was not hard to see at all. BTW also Kansas Skies reported the ability to split the double-double here https://www.cloudyni...ocus/?p=8006766
- No I can not clearly document photographically the split with the Tasco 9VR on a tripod. With no Barlow there is not enough magnification, although after stacking fifteen 800 ISO 0.6 sec pics in DSS the separation Zeta 1-Zeta 2 is visible: see photo. With a Barlow, as noted above, the image is too soft. With a CZJ 18mmH in eyepiece projection configuration and low ISO (800 and .5 sec: see pic) there is a difference in the shape of each pair, but I would not call that a split.
So, in conclusion this was a good topic to focus my interest on as:
- it gave me the opportunity to learn more about noise Vs ISO response of my camera, and about dynamic range. 800 ISO seems the best spot.
- I obtained a Tasco VR manual and understood the use of the extension tubes
- It gave me a nice excuse to buy a complete 9VR set on GW (at a good price btw), in addition to the OTA I had bought separately... now I can have one at each of my two primary observation sites....
Edited by DMala, 11 October 2017 - 10:43 PM.