One year Review of the Celestron C9.25
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- เผยแพร่เมื่อ 3 ต.ค. 2024
- I've had this scope over one year now and I'd like to just give my feedback and thoughts after using it a fair bit now.
Hey guys for more great information on this scope especially from a visual point of view(no pun) go over to @edting channel who has a great overview on this scope.
Brings back lots of memories. I worked at Celestron from 1990-1995 back when we first designed the 9.25. The odd size is because when we went from traditional "blocks" to caternary blocks we found that our old 8" corrector tooling could now make up to a 9.25 corrector. The "block" is a 10" mirror blank (might have been 10.1") that is ground and polished with the same curve that is needed for the corrector plate. A hole is drilled through the middle of the 10" blank and it is then mounted on a spindle in a polishing machine. The unprocessed corrector plate is vacuumed down onto the block and then you polish out the corrector while it's "flexed" against the block. When you finish, the corrector plate takes on the curve that was on the 10" mirror blank.
As someone who has made thousands of Celestron optical systems, only the nearly unheard of 22" is something I'd want more than a 9.25.
Wow that's great information and so interesting to hear this from the point of view of somebody who actually worked there and understands this stuff. Thanks for sharing 🙏
@@OlliesSpace You're welcome. I enjoyed working there. I was just reminiscing tonight with a friend about driving the Celestron truck every year out to the Riverside Amateur Telescope Maker's Conference with a giant load of telescope junk. One man's junk is another man's treasure! I was a much younger man then. These days I have difficulty finding young people who look at astronomy with the same sense of devotion.
Block making was fun. Though it would be very hard to describe it without drawing it.
if someone's got a spare 22", I've got a CQ350 to test it on. 😉
@@usmcbrat2 I remember those days!
@@arizonajim7375 Hey Jim. Did you work at Celestron back then? What department? I started out making C90 correctors, then moved to the Matching room, and finally was the Blockmaker when I left in 95.
Ollie: My first thought when I opened this video was "my god he put that 9.25 scope on an HEQ5!" Glad to hear you actually use the scope on a mount with a much higher payload capacity. Thanks for a great review.
Hey Tsula yes indeed this mount is for presentation only :). BTW you've inspired me to have a go at some visual, been too long since I used my eyeballs !! I might try Jupiter soon. Thanks Tsula 🙏
@@OlliesSpace I thought I heard you say that. Good for you. Wishing you clear skies.
This may be a dumb question, but what can happen if i put a c9.25 on a bresser EXOS-2 mount ? Their page says up to 13kg .
That was an awesome long term view of the 9.25, Ollie! Really enjoyed that and your images at the end are superb...you've convinced me that I need an SCT in my life...but my wallet hates you now! Lol! Have a great weekend, mate!
Oh no mate 😂 I'm sorry, your wallet is gonna suffer!! They really are a super scope mate and yes I also think you need it in your life. 😄 Clear skies pal and thanks 🙏
Very interesting review Ollie with some cool and good-to-know details and personal experience. Also thought to get something like this size. Very versatile scope, big and relatively (!) cheap when you look at the other scopes of this series. Thanks a lot and clear skies
Hey Tully could be a good excuse for a mount upgrade too 😄 don't want to tempt you !! Ye I think the 8 inch is also a very good scope too. Clear skies pal.
@@OlliesSpace haha...I like those "excuses" 😄 ..you already did. ;))
Great review Ollie , unboxing and firstlights are good but our views are sometimes clouded by our excitement for our nice new shiney scope, we get much more accurate review after the scope as been use for some time that way we get to know about it's strength and weakness first-hand , thanks for taking the time to make these video mate
Hey Thanks Tony and good to see you on the Livestream. Ye I like to do these after I've had them a while and get a real feel for the scope. Thanks mate and hope you get a clear skies change soon 👍
Great review Ollie! It's an awesome scope and you've done great work with yours :)
Hey cheers James yep been a good little/big scope. I really do need to try for visual too, I think my new years resolution is to use my eyes 👀 more 😂
Nice run through on the scope after a descent time of usage. Yep these SCTs can be damn heavy to move around, so my 10” Meade lives permanently in the obsy.
Cheers Logan yep pretty much forms my weekly weights workout:)
Nice review Ollie I think the 9.25 is a great scope I'd love one myself, I think Ed Ting did a video about pretty much all Celestron SCT's & he reckons yours hits the sweet spot, by what you've imaged with it I couldn't agree more. As for shooting at F2 it's great when it's dialled in but can be a real pain when problems arise.
Hey mate yes Ed was also key in my decision with going with this one, I thinks he's had em all 😲 Ye I think the hyperstar sounds too painful and also I don't wanna be switching it over anyway. :) 👍
The odd ball scope size make it very versatile. I think I remember you saying you were thinking bout selling it. I've seen others who do and then regret it after wards.. it is a wonderful scope. never sell it!! CS
Yes I did come close Jason thankfully I didn't 😲 good advice it's a keeper......and get's on very well with NINA :)
Ein Fantastisches Teleskop was ich auch habe und es kann es nur empfehlen.Das was mich stört das die Schmidtplatte schnell mit Feuchtigkeit belegt auch mit Taukappe ist es ein Problem,sonst ist es sehr gut.
Excellent review. Where is that accent from? Sounds like the home country?! I have one on an EQ6 - I am currently using it for EAA utilizing a flip mirror from Meade to switch between 2”eyepiece and camera. I am using the ASI A+ which, for me as a beginner, is a kind of turnkey solution. I am staggered at those planetary images. How did you get them? All my efforts at planetary so far have been a dismal failure. my used package came with a hyper star which I have tried a couple of times and it is truly amazing. So fast! Again, excellent review clear skies to you!
Hey mate thanks. Yes indeed it's a great scope. I think I have a couple of videos on my channel for Planetary that might help you. I find either the 224mc camera and X2 Barlow or the 482mc and X3 Barlow make a good combo with this scope and of course shooting quite high frame rate video, then put thru Autostakkert and Registax to stack and Sharpen the image. 👍
Oh and accent is from Sheffield UK, I now have a weird half Aussie/UK northern thing happening!
Why does everyone only take photos of planets with this telescope?
I guess overall the focal length does lens itself well to planets but I enjoy taking all sorts with it.
It’s Ed Tings favorite SCT. I believe if I had another go at SCT’s I would get this one.
Hey Garnett - Yes in fact Ed was also a factor in me getting this as the dude knows his stuff. Ye hard to go wrong with this model it seems at least.
Just bought Hyperstar v4 for my C925. Gamechanger for deep sky imaging.
Cool Des how are you finding it in terms of collimation and what not? I think the only thing stopping me is probably the thought of swapping over my imaging train a lot and having to recollimate.
you don't need to recollimate assuming your collimation screws are tight and you dont have bobs knobs.@@OlliesSpace
Thanks for the info Des, I was considering a RASA but given I can only mount one scope at once I'm starting to lean towards this option. 👍
Great review Ollie.
Knowing what you know now, would you have purchased the Esprit 120 scope, or would you have gone for the Celestron instead of the Esprit. Do you still use your Esprit 120 scope. I am considering purchasing a 120 scope (I currently have the Sky Rover 102 on an AZ-EQ6 mount), however I am concerned that it might be a waste of money and I should get an Celestron 8" instead.
Hey George that's a really hard one. If I had to choose I would probably go my Celestron just because with the Starizona reducer you can still take nice close DSO and then you've got planets and galaxies. However without the reducer maybe the Esprit. It's a tough call. BTW George I saw an awesome deal on the Celestron 8inch at Astro Anarchy just in case you're in Australia. Happy choosing. :)
Good review of the scope. Do you have any issues with mirror flop?
Hi Mike thanks. I don't seem to although from an Astrophotography point of view I'm not exactly sure what I'm looking for. Is it more that it would be losing/changing focus with movement of the scope ??
I had one for planetary viewing and at that stage wasn't doing any deep sky, I sold it for a ts130 APO I sometimes have seller's regret knowing how far Ive gone since I started.
It's always hard mate I actually nearly even sold this scope when the weather was so bad and I was hardly using anything. Also hard as the Galaxies need so many think to come together, clear, no moon .....
Awesome thanks Ollie I heard mixed reviews on this saying there was some coma on the stars and it was recommended to get the edge version because of this. Looking at yours I can’t see coma or fringing have you had any issues like that? Thanks
Hi Simon - I think with the Starizona reducer I really have no complaints and the images and stars look great.
I've recently purchased a Celestron OAG and ASI174MM for my C8 to use with an ASI071MC Pro (APS-C sized sensor). I also have tha Celestron 6.3 focal reducer. Have you noticed when looking down in the OAG guide sensor hole it appears the edge of the OAG body adapter is obscuring the light path in the prism. I've noticed this with the SCT Adapter and M48 female.I use a Blue Fireball SCT to M48 male adapter on the M48 adapter. I think you said you had to use the M42 adapter for the Starizona focal reducer. I don't see a perfectly round illuminated hole, one edge is affected. Even with the Celestron focal reducer on I notice this, since its glass is only 40mm in diameter. What is the diameter of the glass on the Starizona focal reducer. I've set my prism down to the lowest position. it still clears the sensor by 3mm. I guess the workaround is to rotate the guide scope so the longest side of the sensor is parallel to the obstruction. I also noticed the guide camera barrel is slightly larger so the guide camera can tilt a little unless the two screws are evenly tightened. I assume you are using PHD2. Have you notice you get guide stars throughout the guiding window and they seem to be all in focus? Looks like the Baader Click Lock is the way to go with the Starizona. I'm thinking of getting one of those.
Thank you.
Yes it does indeed take a bit of playing around to get everything working nicely with the OAG. Honestly I find you rarely get great stars across the field with an OAG setup, I just do my best to get in focus as possible and then I find it usually doesn't matter that much it still seems to guide well. I must admit I hadn't noticed the body obscuring the prism. I found the combo on the whole works well although as your on the C8 I guess there will be some differences as to the size of the field it will illuminate. I also find it's easier to just use a single star in PHD2 guiding and ignore the multi guide function. Hope it all goes well with your new setup.
Where did you get that handle?
It was from farpoint astro, not sure if they are still in business though.
Hi I have the same scope and as ASI224MC camera. I have been trying to decide if I should go with a 2X 2.5X or 3X Barlow or Powermate and was curious on your opinion?
Hi Matt - I actually watched a video on Dylan O'Donnells channel recently on this subject around sampling for planets. I think for your setup I would go the 2.5X Barlow. Check out his channel I think it's his near latest video which explains how to match up your camera pixel size to your F ratio of telescope. He explains really well.
Cheers :)
@@OlliesSpace Thanks very much for the reply and Ill be sure to check it out. Do you happen to know if you can connect 2 inch barlows to this scope or will it need a 1/ 1/4 to 2 inch adaptor? I cant see an obvious way to do it without an adaptor but maybe im missing something obvious