Honeybadger152

Have you got a spare one of those that you don't use anymore haha That's a pretty sick looking scope

So Chriske, it would appear this mirror is an f/4 rather than an f/8. From what i have read it is super difficult to flex mirrors successfully at that ratio? I ask all of you, just that Chriske has stated he has experience in flexing.

So what would this mean should I want to parabolize the mirror? Would it become more like f/3.5 or does that ratio change based on its shape? I understand that i would need to reposition the secondary + focuser and remove the correction lens

Hi David The scopes rating 127mm mirror f/1000mm f/8 Eye pieces have H on them 20mm 12mm Then a super small one that i've gotten no use out of 3. something mm 3x barlow only 1 lens So far i've had a good look at jupiter and its moons. That was from indoors with awfull light pollution.

I don't suppose you have any before and after images Chriske? Demonstrating the improvement in optical accuracy? I have been searching the net far a wide just for some sort of practical demonstration but can't find much at all.

This is very intriguing. I can't help but wonder though why this wouldn't be common practice with spherical designs. Surely the offset cost for the extra materials would be cheaper than the more expensive parabolising process? Do you know anyone that's done it with before and after images?

I should have explained a bit more about my thoughts towards my query. My intentions are to use the scope as is for now just to learn the ropes and to get a feel for whether it will become a hobby of mine. Personally, throwing a grand or 6 at a setup doesn't excite me and this is no dig at anyone who chooses to do that. I'm a bit of a tweaker kind of guy. I get a lot of satisfaction from squeezing as much performance out of things as possible. Modding/ adapting. I like the idea of perhaps making my own telescope but I'm kind of learning that it's a bit pointless as the costs would likely exceed that of a purchased one. Thanks for the input though regards Chris

So I recently purchased a second hand telescope since I've an interest getting into Astronomy. I knew that the scope wasn't great but at £45 and less than a mile away, I saw some value in it. Being new I didn't want to invest much money at all. The scope is a celestron ps1000. As said before I'm aware it's certainly not something a seasoned amature would buy. My question is... Would it be possible to re-grind the mirror to make it parabolic? Regards Chris