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Stargazer McCabe

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About Stargazer McCabe

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    North Hertfordshire
  1. Stargazer McCabe

    ES82* 4.7mm Internal Reflections...

    Once again Steve G at @FLO nails it... I wrote posing the same question to Team Flo this morning and, as per usual, had a helpful and informed response within 30 minutes...
  2. Stargazer McCabe

    ES82* 4.7mm Internal Reflections...

    Mark, that’s exactly how we’ve used it in the main thus far... I’ll see whether Susie would put up with the 8.8mm and a Barlow. If not, and nobody has a fix, I’ll see if a modern variant does similar. I like a puzzle
  3. Stargazer McCabe

    ES82* 4.7mm Internal Reflections...

    Not a problem at all Mark. It’s just an unusual occurrence given i’ve not encountered anything similar with the rest of them. I couldn’t even replicate using the 8.8mm and a 2x Barlow. On all other targets it works wonderfully. It’s obviously just the bright and big moon that tests it... Susie particularly likes the eyepiece in her Takahashi. I’ll think about ordering her a new one to see if the problem occurs in the more modern ones...
  4. Stargazer McCabe

    ES82* 4.7mm Internal Reflections...

    @Ricochet Interesting. Thank you. Have you been able to find a way around your encountering of it that I might adapt ?
  5. Stargazer McCabe

    ES82* 4.7mm Internal Reflections...

    @Mark at Beaufort Mark I saw you were perusing this earlier this evening. Did you ever encounter anything similar with the eyepiece ?
  6. I have some of the other opticstar eyepieces (Orthos) and they are exceptional... Opticstar can be trusted. They aren’t substandard “clones”...
  7. A little while ago I purchased a “previously cherished” ES82* 4.7mm from @Mark at Beaufort. Being Nitrogen purged, it is an earlier variant than all the other 82* eyepieces we have which are Argon purged. It was passed on in excellent condition and has done well on the deep sky and planetary observing done to date. Recently, I’ve used the eyepiece for the first time on lunar viewing with our Takahashi. It’s actually a nice magnification and FoV with this set up. However, when switching from the 6.7mm to the 4.7mm (or even our 3-6 Nagler zoom) a reflection has been noticeable on the right hand side of the eyepiece (with the moon placed at the left hand side of the eyepiece). Given this is the only eyepiece that both my wife and I notice this in, it has provoked a few questions: 1) Is this a trait of this particular eyepiece or might we have an odd one out 2) I know it’s nothing to do with the gas, but did ES improve any internal blackening with the newer variants if this is something common to other 4.7mm Nitrogen variants ? Would a newer 4.7mm show similar ? 3) Is there any blackening or modifications I might be able to make to the eyepiece we have ? If so, might someone more familiar with this direct me towards an idiot’s guide please ? 4) Could it be nothing to do with the eyepiece construction as such, and actually be a factor of exit pupil and reflection from the surface of our eyes ? (If so, out of curiosity, could someone explain why we might see it in the 4.7mm and not in the zoom when set at 5 or 4mm please?) Thanks in advance
  8. Two things: 1) These may save you a few shillings. I believe they are the same, or very nearly the same as the ES82* range. If anything differs it might be something like coatings perhaps. But do have a look. http://www.opticstar.com/Run/Astronomy/Astro-Accessories-Telescopes-Opticstar.asp?p=0_10_5_1_8_322 2) You'll be on the cusp of where Coma might start to be noticeable to you (depending on how critical you are). I have a 4.7 Dob and a ES82* 30mm. Some nights I don't use the Coma Corrector and some I do. On the nights I do I can reduce the coma towards the edge of the FoV. On the nights I don't the views are still mighty fine with a little more coma visible, but it certainly doesn't spoil my enjoyment. @Littleguy80 raised the same question a while back and I'd tell you what I told him; buy the eyepiece, enjoy it, if the coma is an obvious intrusion, get a coma corrector. If it doesn't bother you, happy days...
  9. Stargazer McCabe

    Stellarium - weird names after upgrade ??

    Thanks @alexwolf I guess it's a classic case of "if all else fails, read the manual !!"
  10. Stargazer McCabe

    Photographic Atlas Recommendations

    @Littleguy80 The Interstellarum Guide works as a stand alone. But if you have the Atlas it works to an even greater degree as the page references for the Atlas pages correspond directly in the Guide... I've just ordered a copy of Dobek's Revised & Updated Version of Barnard's Photographic Atlas of Selected Regions... It should be with me next Wednesday, so I'll let you know how that compares to all the others if interested...
  11. Stargazer McCabe

    Advice On Dob Mirror Cells Please...

    Thanks to everyone. I had no reason for my initial reaction to Didier’s suggestion other than just “gut feeling” I suppose... I now feel I can formulate a more informed reaction which still follows my initial one to be fair. It also allows me to make a more reasoned and informed “capital expenditure” application to the Memsahib (The joys of being married to a Global Commercial Director ) I’m minded to apply for a 20” and if I get away with it But I’d settle for an 18” or, if I pick my moment badly, a 16” Thanks again to everyone who chipped in.
  12. Stargazer McCabe

    Photographic Atlas Recommendations

    The first doesn’t “go in any closer” to be fair. It is very similar to the one you have therefore. Overall quality of the photos is better to my eye. But no more detailed...
  13. Stargazer McCabe

    Photographic Atlas Recommendations

    I have both of these as well as the Interstellarum Guide The Cambridge Photographic Star Atlas https://www.amazon.co.uk/dp/1107013461/ref=cm_sw_r_cp_api_SIs7BbEK6XJG0 The Photographic Atlas of the Stars: The Whole Sky in 50 Plates and Maps https://www.amazon.co.uk/dp/0750306548/ref=cm_sw_r_cp_api_uKs7Bb6B87062 The photos and format are better in the Cambridge Atlas, however, the accompanying maps of the regions edge it in the second one... You pays your money... Or do as I did and elect not to make a choice and buy the lot !!
  14. Stargazer McCabe

    Advice On Dob Mirror Cells Please...

    This might interest those following this... http://astro.dialou.fr/materiels/optiques/orion-skyquest-xx14i/transformation-de-lorion-skyquest-xx14i-par-sud-dobson-partie-1/
  15. Stargazer McCabe

    Advice On Dob Mirror Cells Please...

    That all makes a lot of sense and echoes some of the conversations my wife and I have been having. Our reasons for considering the Truss design are exactly as you suggested. The Flextube, although great, is bulky and heavy. Both in terms of its base and Tube. As I have said in other replies there are pros to each route and it’s an interesting and good conundrum to have... Thanks for helping the deliberations

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