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I'm sure 16mm was/is a flatfield 58 fov offering from bst/barsta.

I also have all of them (12 in total). I have doubled down on 8mm through to 25mm for using with Binoviewer for which they are to me fantastic. 18mm is my favourite. I also have ES82 14mm & ES68 34mm. For Cyclops mode perhaps these are a little better, but come at x3 / x4 cost. I once dropped BST Starguider 18mm onto my patio. It survived it didn't miss a beat. I use mine on Meade LX90 ACF 8 inch. SCT's are kind to eyepieces and with the GOTO and tracking wider field eyepieces aren't really necessary. I also have a set of Meade 4000 SP which are also very good and a couple of zooms that I don't really enjoy. Fixed length eps all the way for me. I think I am all set and don't really need anymore. Just enjoy the view. Of course there may be better options out there but usually at a much greater cost. For some the greater cost may not be an issue and will be justified?? For most of us, BST Starguiders may be the only upgrades we really need.

Would Svbony H-beta 2 inch be ok ?

Thanks for replies. I have 1 x 2 inch eyepiece. ES68 34mm, all rest are 1.25. Would it be best to get this filter as 1.25 or 2 inch? My diagonal is not threaded to accept filters.

Hi, would or could I get much use from h beta filter. I have 8inch SCT and I am in Bottle 3-4 area. I have Oiii & UHC filters which both work great. Thanks.

Thanks for all your advice. Not being able to get ES eyepiece I wanted I decided to stick and double down on 12&15 mm Starguiders. I now have x2 in FL from 8mm -25 mm for my Binoviewer. I also got 5mm & 3.2mm to complete this series. I may not get much use our of these yet?

Is this the same ? https://www.firstlightoptics.com/telescopes-in-stock/founder-marvel-ultra-wide-eyepieces.html

Due to not being able to get hold of ES52 10mm or ES62 9mm I've been enjoying using what I already have with my ES, Meade SP & Starguiders and really enjoying them. Lunar viewing with Binoviewer and Starguiders is fantastic. Perhaps another ep in this 52-60 fov is not really necessary for me. Maybe those ES eyepieces being unavailable have done me a favour. Maybe it's wider fov 10mm/7mm Nirvana that would offer me a slightly wider presentation that could be the better option for me when mono or SVBony 8-3mm zoom. Not sure I would get much use from this Zoom?

Great review. Would this be a useful addition to my LX90 for Lunar observing. Or would it mostly unuseable.

I'm going to try ES52 10mm. I like build quality and enjoy using my 2 ES eyepieces I already have. In my opinion these are the best quality I have.

If Meade HD60 & Celestron X-Cel are same/similar would they perform any better for me visually than my Starguiders? Perhaps the 7mms (6.5) may be an option for a slightly higher magnifiction. Am I maybe needlessly trying to upgrade from what I already have and should stick with what I am already happy with. Perhaps I might be best getting rest of Starguiders for using in my BV set up, this has been suggested previously. Would Vixen SLV 9/10mms not really be much of an upgrade. Although I prefer twist up eye cups, would Nirvana 7/10mms as recommended previously be the most noticeable upgrade. Thank you for all your advice.

Is Meade HD-60 9mm same optically as X-Cel 9mm?

Thanks, I've read the links on TMB clone /BST Planetry and a few other reviews/comparisons, I don't think I want that type. I really think it's going to be Vixen SLV 9mm/10mm. If/when I get the view I'm hoping for I may then add 6mm/5mm for those nights when useable. Do any SCT users use these. Celestron X-Cel 9mm/7mm not completely ruled out. I think Vixen SLV will give me most improvement? Could a Tele Vue Plossl 11mms give me much more improvement? The cheapest option is getting another of each 12/15mm Starguider and adding 5mm? I could also do same with my Meade super plossl but I think that could be more challenging to match a pair as there are several series/additions to these, plus I'm leaning towards twist up eye cups.

Thank you, StellaLyra 20mm seems to be way forward for me for Widefield. At higher power end it seems a little more difficult. Based on my preference for twist-up style eye cups, I think it's between Celestron X-Cel 7(6.5mm)/9mm or Vixen SLV 6/9/10mm. There isn't any BST Starguider at those FL so I would not be unneccesarily doubling up. As this is for occasions when I don't use BVs is there a clear best in range amongst these that I should lean towards. Will Vixen SLV work well in my SCT. I understand they are narrower FOV , but if this view is sharper/clearer to me it will be worth it.Are Vixen SLVs worth the extra over X-Cel/Starguider?

Thanks again for your replies. Your time really is appreciated. Would X-Cel and Luminos be same optically out to 60 ? Im liking Nirvana 7/10mm, only negative, I think I would prefer twist up the cups, but that's not a deal breaker if it is optically superior. The price on these do seem good. Another I'm considering is Vixen SLV 9/10mm

Thank you, I don't think I will bother with 2 inch Barlow lens. It would be a heavy combination. Probably best getting an eyepiece instesd. I'm more leaning towards StellaLyra 80 20mm. At the higher end I've been looking at Celestron X-Cel LX 7mm (which could be closer to 6.5mm) or X-Cel LX 9mm. Would Luminos 7mm/10mm be a better choice here or will it be wasted. This will be used on occasions I don't BV. I will eventually double up at 12/15mm for BV.

Thank you for all your advice, it is really welcome. I do like the idea of StellaLyra 80 20mm . As my FL gap seems to be in 20-25mm for wider views, would Antares x1.6 Barlow be a worthwhile route? This would alter my 34mm to 21.25. This 34mm is my only 2inch ep. Yes, I do enjoy using Binoviewer on Moon and planets, I agree a 12mm or 15mm may be better for this. I have both BST Starguider 12mm&15mm (1of each) & Meade 4000 SP 12.4mm & 15mm (1 of each) Would my Meade Plossl perform any better in BV? or as I know my Starguiders work well for me in BV , should I stick to them. I do enjoy using my Plossl and they perform great as a single ep. I think at the moment Plossl is slightly cheaper. I don't always use BV when observing moon/planets, sometimes for quickness a few high power eps. I have had great success on different occasions with all my Plossl and Starguiders. 6.4mm, 8mm, 9.7mm, 12mms 12.4mm. Without using a Barlow I could maybe have a gap at 7mm & 9mm. I was considering Orthos , but I think comfort is a big factor. Would a 7mm/9mm Celestron X-Cel LX be a good choice for this? If the X-Cel LX was a good choice maybe the could fill in at 12mm for BV?

My fixed fl Starguiders in Binoviewer are far better than my zooms. It is a much more enjoyable experience. The view is much brighter and sharper. If this is the best I can achieve I will not be dissapointed. So maybe double up on 12& or 15mm . They do seem to work well for me with my set up. Would having pairs of 8,12,15,18&25 be a good way to go or would that be overkill?

Thanks, I do have x2 Starguider zooms 8-24mm. Optical difference is night and day. Much prefer using fixed fl ep's. Maybe my zooms aren't very good. I hardly ever use. I actually forgot about them.

I have Starguider/Arcturus Binoviewer and use pairs of 8mm, 18mms & 25mm BST Statguiders. 18mm are my favourite. I also have the x 1.85 & x3 Barlow that were included in set. I'm not against getting another 12 & 15. Would orthos be a better way to go for BV?

Hi, I have LX90 SCT 8inch. My Best Eyepieces are ES82 14mm & ES68 34mm. I also have a set of BST Starguiders 8mm through to 25mm and a set of Meade Plossl 6.4mm up to 40mm & a Binoviewer. I think I have most FL covered. I was all set for ES82 11mm and ES68 24mm as my next upgrades until I found Nirvana 10mm ES UWA and StellaLyra 80 20mm/9mm LER/UWA. Nirvana seems to be half the price of ES in UK currently and StellaLyra just slightly more than ES at £195. Or will the Eyepieces I have suggested only be a small upgrade and perhaps I may be better served continuing with eyepiece pairs for binoviewer . I prefer to buy new and £200 is most I will pay for an eyepiece. Thank you.