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    Default iOptron R80 Telescope



    I have one of these coming my way, telescope and maybe a tripod, but not the Cube mount that typically accompanies these short rube refractors. Anyone have experience with these? I understand it is very similar to the plethora of ST80s that have come from many different manufacturers, but I'm thinking specifics with this one. What can I expect as far as performance problems and virtues?

    I have heard the focuser is a bit problematic, but are there any other issues inherent in these scopes? Maybe I just worry too much. Any advice helpful.
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    Default Re: iOptron R80 Telescope

    Congratulations on your new telescope. Let us know about how it works out for you.

    I really don't know much about the R80 specifically. As far as I know no one has ever made a posting here on the forum about having any problems with the telescope. iOptron is a reputable dealer, primarily with telescope mounts, but does sell telescopes too. iOptron products are excellent and iOptron services what they sell, at least in the USA.

    The R80 is a rich field of view telescope... great for deep space objects that cover large areas but not good for planets...80x needs a 5mm eyepiece and excellent seeing conditions. From what little I do know about the telescope, I suspect that it is a notch down from the Orion ST-80/SkyWatcher StarTravel 80.
    Last edited by sxinias; 01-12-2014 at 05:25 PM.
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    Default Re: iOptron R80 Telescope

    Quote Originally Posted by sxinias View Post
    Congratulations on your new telescope. Let us know about how it works out for you.

    I really don't know much about the R80 specifically. As far as I know no one has ever made a posting here on the forum about having any problems with the telescope. iOptron is a reputable dealer, primarily with telescope mounts, but does sell telescopes too. iOptron products are excellent and iOptron services what they sell, at least in the USA.

    The R80 is a rich field of view telescope... great for deep space objects that cover large areas but not good for planets...80x needs a 5mm eyepiece and excellent seeing conditions. From what little I do know about the telescope, I suspect that it is a notch down from the Orion ST-80/SkyWatcher StarTravel 80.
    Thanks, sxinias! I imagined it wasn't quite up to par with the Orion model, but as a gift, I can't really complain. Are there specific aspects about the scope which may be problematic? I had heard the focuser had some issues, but I am also curious about how the optics are.
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    Default Re: iOptron R80 Telescope

    I have an ioptron R80, and yes it does have great optics for an achromatic, but the focuser is really cheap. I put a couple layers of plastic tape inside the focuser to shim it a bit tighter to the drawtube, which really helped the focuser slop. I also added a cheap red dot finder to help speed up alignment. I mostly use it for white light solar imaging which it gets a really nice full disc image with the Neximage 5. I hope you enjoy your new scope as much as I enjoy mine.
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    Default Re: iOptron R80 Telescope

    Quote Originally Posted by Sparky77 View Post
    I have an ioptron R80, and yes it does have great optics for an achromatic, but the focuser is really cheap. I put a couple layers of plastic tape inside the focuser to shim it a bit tighter to the drawtube, which really helped the focuser slop. I also added a cheap red dot finder to help speed up alignment. I mostly use it for white light solar imaging which it gets a really nice full disc image with the Neximage 5. I hope you enjoy your new scope as much as I enjoy mine.
    I might be able to get my hands on the focuser that comes stock with Orion's ST80, do you have any idea how the two compare? Would it be worth bothering to change? Thanks, Sparky.

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    Default Re: iOptron R80 Telescope

    Hi I have it too I think it's a great refractor for the price, I have this one, it was my first scope and I love it

    iOptron

    I took this photo with an iOptron solar filter, and afocal with the Baader EP

    Attachment 76843

    I agree focus is not good but you have to be patient, like everything in this hobby

    Down here (in Putaendo Chile) I bought it for a little more than USD 600, about three years ago, it was my first scope then I bought the 6" Celestron reflector with the CG5 mount, ( told my wife I was going to sell the ioptron, so evryting was OK) ioptron is still here jjajaj

    I really enjoy my ioptron G-R80, I did some improvements, I changed the plastic washer for a cooper washer to set up my 6"OTA and it works fine

    Contact Paul (Astronewb) he knows a lot

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    Default Re: iOptron R80 Telescope

    I've never seen the ST-80 in person, but I know it does actually have a metal focuser, and is much better quallity than the r80 has, so it may be worth the change if the replacement focuser is not too expensive. I guess it all depends on if you plan to use the scope for imaging or just visual use.
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    Default Re: iOptron R80 Telescope

    I think the real question is not if the focuser is good but "Is the focuser good enough for the telescope and usage?" I suspect the answer to that question for the R-80 is yes, it is good enough. Before replacing the focuser, use your telescope a while. You will come to your own conclusion about the focuser and whether or not you want to spend money on it to get a "better" focuser.

    The focuser road can lead down a very slippery path. Some people have the opinion that any rack and pinion focuser is garbage. I've even read reviews where people complain about focusers on $1000 plus telescope OTAs... seems to be the in thing to do in some circles. Sometimes the criticism is justified. The worst focuser I ever had was on my DS2090AT refractor... a plastic wonder indeed. When you tried to focus it, the scope would move off target out of the field of view; now that's bad. Here again, a little adjustment and lubrication produced a workable focuser but not one suitable for photography, etc.

    BTW the focuser on the ST-80 is an all metal, rack and pinion, focuser, and it gets bad-mouthed a lot. Does it have gear backlash? yes; a tiny bit. Is it the best focuser in the world? No, but if you take a little time to adjust it and lubricate it; it is good enough to achieve a very fine focus without moving the scope and sturdy enough not to droop or move under the weight of a camera, etc. I use mine for astrophotography and at one time considered replacing it. I decided not to as while a better focuser may be a little easier to use, the ST-80 focuser is good enough.
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    Default Re: iOptron R80 Telescope

    Quote Originally Posted by sxinias View Post
    I think the real question is not if the focuser is good but "Is the focuser good enough for the telescope and usage?" I suspect the answer to that question for the R-80 is yes, it is good enough. Before replacing the focuser, use your telescope a while. You will come to your own conclusion about the focuser and whether or not you want to spend money on it to get a "better" focuser.

    The focuser road can lead down a very slippery path. Some people have the opinion that any rack and pinion focuser is garbage. I've even read reviews where people complain about focusers on $1000 plus telescope OTAs... seems to be the in thing to do in some circles. Sometimes the criticism is justified. The worst focuser I ever had was on my DS2090AT refractor... a plastic wonder indeed. When you tried to focus it, the scope would move off target out of the field of view; now that's bad. Here again, a little adjustment and lubrication produced a workable focuser but not one suitable for photography, etc.

    BTW the focuser on the ST-80 is an all metal, rack and pinion, focuser, and it gets bad-mouthed a lot. Does it have gear backlash? yes; a tiny bit. Is it the best focuser in the world? No, but if you take a little time to adjust it and lubricate it; it is good enough to achieve a very fine focus without moving the scope and sturdy enough not to droop or move under the weight of a camera, etc. I use mine for astrophotography and at one time considered replacing it. I decided not to as while a better focuser may be a little easier to use, the ST-80 focuser is good enough.
    Excellent insight, sxinias. Perhaps I am just getting a little too excited sitting around waiting for this scope to arrive? Astrophotography isn't much on my mind right now, strictly visual observation. So I suspect it can't be that bad. I am certain the focuser will be usable, but with the offer of a free Orion ST80 focuser in mind, it is something I will keep into consideration also. I agree you are right that I should use the scope for a while and get a feel for it and see how it works. I currently use a 60s 50mm Tasco f/12, and although the focuser is all metal, I have no idea when it was greased last and when I got it, the motion was very stiff, but once I moved it through its full range it was noticeably improved.

    I can't tell from the photos, but is the focuser on the iOptron plastic?
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    Default Re: iOptron R80 Telescope

    Quote Originally Posted by sxinias View Post
    I think the real question is not if the focuser is good but "Is the focuser good enough for the telescope and usage?" I suspect the answer to that question for the R-80 is yes, it is good enough. Before replacing the focuser, use your telescope a while. You will come to your own conclusion about the focuser and whether or not you want to spend money on it to get a "better" focuser.

    The focuser road can lead down a very slippery path. Some people have the opinion that any rack and pinion focuser is garbage. I've even read reviews where people complain about focusers on $1000 plus telescope OTAs... seems to be the in thing to do in some circles. Sometimes the criticism is justified. The worst focuser I ever had was on my DS2090AT refractor... a plastic wonder indeed. When you tried to focus it, the scope would move off target out of the field of view; now that's bad. Here again, a little adjustment and lubrication produced a workable focuser but not one suitable for photography, etc.

    BTW the focuser on the ST-80 is an all metal, rack and pinion, focuser, and it gets bad-mouthed a lot. Does it have gear backlash? yes; a tiny bit. Is it the best focuser in the world? No, but if you take a little time to adjust it and lubricate it; it is good enough to achieve a very fine focus without moving the scope and sturdy enough not to droop or move under the weight of a camera, etc. I use mine for astrophotography and at one time considered replacing it. I decided not to as while a better focuser may be a little easier to use, the ST-80 focuser is good enough.
    Excellent insight, sxinias. Perhaps I am just getting a little too excited sitting around waiting for this scope to arrive? Astrophotography isn't much on my mind right now, strictly visual observation. So I suspect it can't be that bad. I am certain the focuser will be usable, but with the offer of a free Orion ST80 focuser in mind, it is something I will keep into consideration also. I agree you are right that I should use the scope for a while and get a feel for it and see how it works. I currently use a 60s 50mm Tasco f/12, and although the focuser is all metal, I have no idea when it was greased last and when I got it, the motion was very stiff, but once I moved it through its full range it was noticeably improved.

    I can't tell from the photos, but is the focuser on the iOptron plastic?
    green12 likes this.

 

 
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