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Collimator test - Hotech vs Howie Glatter vs Catseye
By
Corpze, in Member Equipment Reviews
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By Synq
Hi I am fairly new with telescopes and I noticed my telescope needed collimation. I preview the collimation at the beginning (tell me please if its alright) however after I finished the secondary mirror kept tilting and not staying in place as seen in the video. This is a Heritage 130P telescope. Please help.
VID_20201123_161617.mp4 -
By Guanzz
I want to purchase the AC for optical axis calibration, but after consulting the jim fly, he is not sure whether the tool can be operated on the hyperboloid primary mirror, so has anyone used the catseye autocoliimation tool to perform the optical axis on the sharpstar 150hnt f2.8 Calibration, please share information, thank you
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By StarGazingSiouxsie
Hi,
Just thought I'd share this in case you haven't seen it already. A recent (September 2020) article added to the Celestron 'Knowledge Base' on collimating SCTs.
I don't claim to have seen all articles on collimation, but this is defs one of the best that I have seen.
https://www.celestron.com/blogs/knowledgebase/sct-edgehd-collimation-guide
Siouxsie
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By StarMich
I'm aiming for the best possible field illumination for my Explore Scientific PN208 f/3.9 imaging newtonian. The scope is 5 years old now and while doing maintenance I wanted to do something about the design flaws as well.
With the current secondary holder design it's impossible to center the mirror beneath the focuser. My question is: is this really an issue when the entire primary is visible? I read about optimal field illumination when the secondary is centered, but this isn't achievable with this telescope.
I attached an image showing the (very bad aligned and already degrading) secondary at the moment. This is as far down as I can go, I would need to replace the holder screws with longer threads to go further but I don't know if it would make any difference for field illumination?
Thanks in advance,
Michael
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By Corpze
Hi, I have just recieved the last item which was on back order for a couple of months from USA. I already had the Infinity Eyepiece but was waiting for the BlackCat.
Everything was ordered from FLO and i was very happy with their service.
Instead of writing an essay, i made a video of how I use the tools and how they look, but in short - Theese tools are FAR superior to the Howie glatter, even with the Tublug.
/Daniel
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