Jim Fly - Manufacturer
14" Strut; 10"XT; 102ES; 22 in Process; 3.5,5,7,10,14,20mm Pentax XW; 17.3 & 12mm Delos; 27mm Panoptic; 20&24mm ES 68; 24mm ES 82; 30mm ES 82; 6&10mm BCO;
I checked that out.
How does a 21% reduction in pupil diameter improve axial error resolution? Is there percentage improvement to be shown? I guess I am looking for maybe a picture showing what looking through the ac's pupil before and after the improvements looks like and how that translates into easier, better, fill in the blank, collimation.
I confess, I am a visual learner.
I see how the mirror holes could be improved as my current xlk's mirror hole edges are ragged and jagged. That has never seemed to bother me so where would it make my experience better. I am kinda asking to be sold, since I highly like the xlk already , I just need to understand it better.
Maybe Jason K can jump in with one of his artful illustrations since they are the bomb!!
Please don't take this wrong, I am just sincerely trying to understand it with all my questions.
Quote:thanks Jim!I must confess I am a bit of a layman, those links were a bit over my head. But what I did get from your response is that a 21% reduction equates that much more improvement, than why not go 50%? This question is out of curiosity and fun learning. I am sure there are limits which you could explain thoroughly. I will do my best to understand.Take care and thank you.And if it is not realistic to explain it simpler, no need to answer and no harm done, I understand some things just cannot be simply put.
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Do you have pictures showing these improvements, before and after, that we could see?
Thank you sir!
Quote:Hello Jim:I have a "XLKC". Will the XLKP mod give me better collimating vs what I can get now?TIA, Jim Miller/Tulsa
XT10 classic with premium optics Tri-knob CR2 focuser
Catseye + Glatter collimation tools
StarBlast 4.5" & 6"
Round Table Platform
Quote:Thank you Jason.Correct me please if this is wrong so I do not mislead others and myself. Ugh!So, by #2 being visible/brighter longer, one is able to align better as you can see where the reflections are moving for alignment/collimation as opposed to guessing the last little adjustments/tweaking due to it's early disappearance.I have noticed that myself from my own experience and kinda remember hoping it was there. Don't have a scope anymore to practice on but will in a little bit. Thanks again!
Last week I had both my XLK and XLK-C upgraded by Catseye to XLKP and XLKP-C. I was so impressed by Catseye quality and workmanship I decided to resurrect this thread to share my impressions. Below is the "before" XLK photo (left) and the "after" XLKP photo (right)
Below is a close up. The new pupils are circular with well-defined edges and more importantly they are smaller.
Referring to my last post in this thread which I posted more than 6 moths ago, I wanted to demonstrate the point I made in that thread. I started off with a well-collimated setup then slowly increased the distance between the focuser and optical axes. Both axes remained parallel. I kept moving them apart until reflection 2 appeared via the central pupil. I calculated that distance to be 0.6mm. That means with the new XLKP maximum PAE and FAE is less than 0.6mm. Of course those who follow the proper procedure should end up with an error far less than 0.6mm but in case something goes wrong with the procedure the error will be easily detectable when it exceeds 0.5mm. The top row in the following photo represents good collimation with error smaller than 0.1mm. The bottom row is with an error of 0.6mm -- visible error.
I also compared my upgraded XLKP against my XLKP-C and they provided consistent results as the original two. Consistency is as important as quality when evaluating vendors.
Kudos to Jim Fly for superb quality collimation products
What is the turnaround time on this?
"Many a night I saw the Pleiads, rising thro' the mellow shade, Glitter like a swarm of fire-flies tangled in a silver braid." Tennyson: Locksley Hall
Typically, turnaround is inside 1 week from receipt of original XL or XLK.
Thanks Jim. I'll be getting to that soon. I need to first size up the truss poles on the scope I'm building and at least have one good look-through with it well collimated. That'll be this weekend, weather and UPS permitting. Then I'll send 'em along.
Thanks for resurrecting this. When I first heard about the upgrade I had meant to send my XLK in for it. But it got pushed down the To-Do list and eventually forgotten.But with the approach of full moon, timing is excellent and I sent it off to Jim today.
Jeff Morgan - Wile E. Coyote School of Telescope Making
Thanks for the excellent report, your amazing visuals and the kudos - much appreciated!