I also wanted a low power 1.25" eyepiece a while ago. I bought this. It's not fancy but does the job well for the price. I have no idea if you can purchase it on Amazon UK.
Gosky 32mm 1.25inch Plossl Telescope Eyepiece - 4-element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters (32mm) https://www.amazon.com/dp/B07F7N9QFK/ref=cm_sw_r_cp_apa_Xd-TBbZYD904Q
Probably Meade 97D 90mm f/11 Maksutov-Cassegrain?
Please check for markings like this (<-probably it) or that.
If it's a 90mm Maksutov, 1000mm focal-length.
Measure if the diagonal takes 1.25" or 0.965" diameter eyepieces.
> catch the comet
Maksutovs show a rather small maximum field of view.
You can observe the comet with your naked eyes or binoculars quite well.
> eyepiece
You need multiple eyepieces.
A 32mm 52° shows the largest field (40mm just are limited by the barrel diameter and show the same field effectively). Random link
For planets, the telescope may handle up to 160x realistically. But things will already get dim, dull. Sadly short cheap eyepieces usually have poor eye-relief. A 9mm 66° eyepiece would be on the safe side, a 6mm 66° if you really want to push it. Link, link. A decent 7-8mm eyepiece would be more expensive ($50-$70 unless you get it via eBay, Aliexpress from China).
One or two in-between, e.g. 15mm 66° or Plössl-type.
There are zoom eyepieces, I usually don't recommend them, but they can be fun for a Maksutov as it also makes for a nice day-time spotting scope. (Orion 7-21, Celestron 8-24, avoid the cheaper no-names. The down-side: At the lower magnification they have tunnel-vision. Overall, fixed magnification eyepieces are better performer).
Make sure the ebay focuser fits, it was a random link. If you can adapt a 1.25" drawtube/focuser you'll have it a lot easier in the long run :-)
> Would a 32mm be too large/not magnifying enough? I think this originally came with a 25mm. What is the advantage of the 32mm besides a wider fov? Would you recommend both or is the 32mm just much better? Would you recommend me getting a 12.5mm in 1.25” format? What qualifies as a short plossl vs a long plossl?
Have you looked at the eyepiece field of view simulation?
For an overview and finding stuff like nebulae, a larger true field of view is better.
An older kit eyepiece like the 25mm might only have 40° apparent field of view, showing less field. The 32mm Plössl shows about the maximum field on a 1.25" focuser.
A 32mm costs $17.50 via Aliexpress, $19 via eBay, $26. The 25mm are indeed a bit cheaper, but IMHO the additional field is nice to have. 40mm exist, but don't show more field in practice, just have a narrower afov.
https://www.amazon.com/Gosky-1-25inch-Plossl-Telescope-Eyepiece/dp/B07F7N9QFK
https://www.ebay.com/itm/NEW-32mm-Meade-Series-4000-Plossl-telescope-eyepiece/293553791370
https://aliexpress.com/item/32851876371.html / https://aliexpress.com/item/32780720204.html
If you're just interested in only planets, the 4.5mm-6mm eyepiece along with your 12.5mm will do. You don't need a 25-40mm to find them.
But you'll need a (cheap plastic reducer) adapter for using your existing 0.965" eyepiece then. And a 10-15mm Plössl costs $10-15 at Aliexpresss/eBay perhaps.
https://www.aliexpress.com/item/32805977303.html
https://aliexpress.com/item/32923085731.html
https://www.amazon.com/dp/B07H8YZHFT/ref=twister_B07MVSSW4V?_encoding=UTF8&psc=1
There are the HR Planetary clones directly from Amazon and others, if you want fast shipping, but at the cost there ($50) you could almost get a BST Explorer, Dual ED or better eyepiece.
Plössl+Barlow works too.
I'm not a big fan of barlows, they reduce the contrast. A good barlow costs more and only makes sense if you have a decent, more expensive eyepiece to start with.
The Mars kit can be nice, color filters sliiiiightly enhance planetary detail, https://www.amazon.com/94312-Celestron-Mars-Observing-Telescope/dp/B07DGRZ6P1, but the barlow isn't (much) better than some of the $15-$20 barlows.
You could combine it with a 9-10mm Plössl (but <10mm already have very short eye-relief).
> I want the finder scope to be useable and fit in the stock holder if that’s possible. It doesn’t have to be $8 but I’d like to keep it under $75 if possible while still achieving the goal of relative clearness. I own riflescopes so I know that you generally get what you pay for with optics.
You could adapt your riflescopes if that's an option :-)
> fit in the stock holder
As for optical finders, I wouldn't go for the cheap 5x24. But that's probably what will fit in the stock holder only!
If possible though,
https://www.ebay.com/itm/6x30mm-Crosshair-Erect-Image-Right-Angle-Telescope-Finderscope-Bracket-White/362971785214 (At least a bit better, right angle is more ergonomic)
50mm finders are th best optical finders, but they cost quite a bit and certainly won't fit the stock finder.
If you like to tinker, you can get 60mm and 70mm short refractors (70/300, 60/300) which can be adapted as finder, but as you want the stock finder bracket, that's no option then
You could also go for a red dot
https://www.ebay.com/itm/Red-Dot-Viewfinder-Star-Finder-Scope-Set-for-Celestron-80EQ-80-90DX-SE-Telescope/114240215230 (The cheap ones aren't particularly good, ideally avoid the cheapest with red tinted plastic, that's bad for finding things at night), https://www.ebay.com/itm/Red-Dot-Finder-Scope-Star-Finder-Sight-for-Celestron-EQ-DX-SE-Telescope-US-Ship/172766346818
Or Telrad/Rigel. More expensive though. Can usually be taped to the tube.
Really boils down to your goal. To find the moon/planets, you can use anything, even some DIY iron-sight or long tube. For deep-sky, a larger optical finder or Telrad and maps is the way to go :-)
> isn't as stable
Yeah, sadly it's an issue with all sets. They are often delivered with an EQ1 or EQ2 mount, and nowadays even worse weak aluminum tripods. Such a telescope belongs on a NEQ3/CG4 type mount, that would cost more than the entire set... That's why the manufacturers put it on a weaker mount to keep the kit price attractive :-/ And the CG4/NEQ3 costs almost as much as a complete 6-inch dobsonian telescope.
A dobsonian rockerbox is usually the only cost effective upgrade.
Else, to increase stability, don't extend the tripod fully, place some weight under the center plate.
> y I could get away with not cleaning them
Good, you found the tutorial :-)
As telescope mirrors are first-surface coated, meaning the delicate coating is on-top of the glass, not behind it. So micro fiber cloth or glass cleaners can make things worse :-)
> collimated
Great :-)
> phone
You can take nice shots of moon and planet with your phone even, or modified webcams, there's no benefit in a DSLR or anything. :-) There are planetary cameras, but there's no need to invest that much right away. People manage to capture amazing images with phones.
Clear skies :-)
Eyepiece field of view simulation:
Overview
A 32mm or 40mm Plössl shows the most field. The 40mm have a narrower apparent field of view so that's why they cost less.
Planets
-Less magnification, but cheaper (and can be modified), 6mm 66°, Amz, Ali, Ali without reviews.
In-between:
Random links! YMMV!
If the telescope only takes 0.965" eyepieces, you can just get one of the poor sets, used or for $15 in China, ~$25 in the US 1, BUT performance is very, very poor.