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martinclayden

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    Preston, England

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  1. Thanks for your reply. I'll use those settings. I must admit, I'm struggling to get my head round why an optically flat filter can affect the flattener settings... Regards Martin
  2. I have these items (WO 73 & flattener) and I'm trying to find the correct backfocus procedure for the flattener, when used with a Canon DSLR with a clip filter fitted. I've read that the thickness of the clip filter (Optolong L-Enhance) matters - true? I've read that the flattener is to be set at 11.4mm - true?. The clip filter thickness is to be added to this - true? Do WO publish a detailed procedure ? Thanks Martin
  3. Seems mine was made by Orion UK - a startup from 1984. The worst part about it is the rack focuser - massive backlash, stiff, imprecise. Hope to replace it one day with a Crayford or maybe a Baader Steeltrack🤞
  4. I still have my Orion. I found out the other day that it was made on the UK by Orion UK, sometime in the late 1980's. I've contacted Orion for more info
  5. These are photos I took myself, they are not PhotoShopped!! The scope is a UK made Orion LX200D from the 1980's. I've only found out in the last couple of days that there is both a US Orion and a UK Orion
  6. I inherited one of these - which I understand was bought at Jodrell Bank here in the UK, back in the 1980's. It was on a Vixen SP Mount. It's another variant; this time LX200D. It's a completely unmodified classic Newtonian, as purchased. Still produces good images though I'd be interested to know more about this - where it was originally made, etc. TIA Martin
  7. I did just as you suggest - nervously - but it worked. Many thanks for the tip! incidentally - while reading about this issue I came across the controversy from 2016 about these filters being a copy of Astronomik's mechanical design, but it's suggested made to lower quality standards - explains the poor fit
  8. It has the two arms, which I thought were springs, I'm reluctant to attempt to bend these
  9. Here's an image of my filter, two notches, two springs and NO flex and a loose fit!!
  10. Videos on the web suggest a push click fit, with an ef-s lens the filter is free to move a couple of mm Optolong's web site push firmly. I think their manufacture tolerances or dimensions have changed
  11. Interesting, my filter sits loosely on those ledges, it's not firm at all. Videos on the web suggest a push click fit. With a lens fitted the filter is free to float forward, but probably only by 1 or 2 mm
  12. Not sure if this is the right group for this ? I just received one of these filters (Jan 21) from FLO and I am having great difficulty in fitting to either a Canon 60Da or 77D When inserted, the filter sits on these ledges (I think - they are under the filter) - and CANNOT be clicked into place. I've also tried an angled insertion technique I read about, to no avail. With a lens fitted the filter moves around (not a massive issue for me as I use the camera for astrophotography - and the camera is always pointed up), but still, at the price, I'd expect a secure fit Has anybody got any advice Thanks Martin
  13. I've been reading around for a few days now to try and find a definitive answer to which is the better filter to use for a modded DSLR. To be clear this means that just the rear UV/IR cut filter has been removed. I think the answer is CLS, that the CCD version is better for "full mod" cameras is this right ? TIA Martin
  14. Yes, some say they are of use in setting the home position, but other than that, I agree
  15. Thanks for your replies. I suspect it's the inclinometer that's out. Just need to be patient and wait to align to the Pole Star
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