![]() ![]() I've lost faint fuzzies in the edge of field atigmatism of budget EPs, which means the longer focal lengths aren't much more use than a cheap Plossl. I trained the 25mm BST and a 25mm SW Plossl on a distant roof and gained little more than half a roof tile in the FOV, but the SW Plossl was MUCH sharper edge to edge. The point I feel worth making here, is that that with budget EPs, you can be giving up a lot for a few extra degrees of FOV. The 5mm BST may have suffered from pushing the magnifiaction and therefore the resolution of the scope further, but I generally found I prefered the view through the 8mm TMB. There was little to separate them, but the slightly narrower FOV of the TMB 'designed' EP, was sharper across the view offered. Likewise, the 8mm was decent, but I prefered the edge to edge sharpness of the TMB 'designed' planetary, also available from STL. Fair play to a cheap EP in an F5 reflector, but with the 18mm, it was more like 10% - It was a big jump and I prefered the view through a £20 SW 25mm Plossl. Most of that holds true for the other focal lengths, but I found the 25mm suffered more from astigmatism on the outer 25% of it's field of view. They're not far off being parfocal too, which makes swapping from one to the other easier. The large objective makes them dead easy to view through, as does the eyeball friendly twist up eye cup. They offer near plossl clarity with a bit more FOV, a more consistent eye relief and superb build quality. In my experience, the BST/Starguider 12-18mm EPs are superb. The 2" EPs oferered by STL are something else altogether. Thanks in advance.The BST/Starguider EPs are a 1.25" lineup. It would also be useful to know if they are parfocal. So, if you have experience of any of them, how about writing a review? We would all greatly appreciate it. It seems that ED glass is used in them, so they should be good I think. r/telescopes aims to be a high quality sub where users can discuss all things telescopes and astronomy, but allowing such repetitive and low-effort posts will drastically lower the overall quality of the sub.I am very keen to know more about the BST eyepieces as sold by Sky's the Limit. Low-effort content such as those complaining about the weather (we get it, clouds are bad), simple questions that usually result in one line responses (these should be posted in our weekly discussion threads instead), general 'shitposting', memes, etc. Titles should be descriptive about what you're discussing/posting. Titles should not be 'clickbaity' nor self-deprecating - we're all here to learn so there is no point in calling yourself a 'noob' and/or putting yourself down. Concept art is not permitted, nor is content not relating to visual astronomy/telescopes. Images must be taken by you, with gear which you own - remote or professional services such as DSW or Hubble are not permitted. This enforces quality, encourages discussion, and benefits everyone. This includes your gear as well as any processing you did to the image. Images must have a top-level comment containing acquisition and processing details. Self promotion is only permitted to active members of the community. Not providing commentary, or posting content from a single source will be assumed to be attempts of driving traffic, which is not allowed here. This sub is a place for everyone to learn and help each other, and such behaviour only does bad things to everyone involved.ĭirect links should be accompanied by commentary as a top level comment, and should be a source of discussion. Non-civil behaviour such as insulting, flaming, etc, will not be tolerated. ![]() You can post used item ads here, but do post them on other communities or websites such as Cloudynights, Astromart, etc. There are other subs and communities for this. Links to petitions, surveys, crowdfunders, and other advertisements to sell your own products are prohibited here. Failure to read and posting "which telescope should I buy" will result in your post being removed and you being referred to this guide. If you're totally new to telescopes and astronomy, please read our Beginner's Quick Guide to choosing your first telescope which is sticky'd to the top of the subreddit. Posts are helpful for people with similar questions.)īefore posting, make sure your post follows the subreddit rules otherwise they may be removed. ( For more in-depth help, please use the subreddit. Anything that relates to amateur astronomy and its practice. Telescopes, eyepieces, events, marathons, charts, eyepieces, reviews, marathons, articles, etc. ![]()
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