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Dezerker

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About Dezerker

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    Cornwall

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  1. That's really interesting, thanks Gary. Particularly pondering that tight spot you mentioned. It feels like my Star Adventurer is sort of 'sticky' - even when the clutch is loosened right off, it feels like there's spots of resistance when you then try to rotate the mount through RA. Like you, I'm trying to hone my setup and get as much experience as I can, so that I can take it out to darker skies and have it really perform the way I hope it can. Interesting too to hear your better results with shorter guiding exposures - clear skies (and weekend of course) here tonight so might give
  2. Oh I hear you and feel your pain on this! I headed off to a dark sky site near Dartmoor recently as a number of weather sites said "no doubt - clear skies all the way"...it started hailing / snowing at 1am and continued to so so intermittently (with full cloud cover) until I left at around 9am...how the algorithms (or is it humans, still?) interpreting satellite images can't spot a bank of cloud that size is beyond me...I recognise cloud can move faster / slower than they expect. but what frustrates me is they don't seem to update when they're wrong. Even at 7am they were all still saying "y
  3. That is weird - I have wondered about going with a faster guiding exposure time, and plan to trial next time we have clear skies - be interested in what happens if you do change yours back. The pattern I see all too often with 3 second exposures is a correction sent to the mount when it was maybe 1" out, that sends the mount so far out the opposite way that 3 seconds later when it next looks, it's already too far gone! This then triggers 3 correction pulses, the first halts that direction of travel, the second correction pulse brings it some of the way back, and once again, the third correct
  4. Hey @Chefgage, sorry for the slow reply (crazy time at work) and many thanks for your thoughts on this - yeah there's definitely some nights that are better than others - I struggle with the inconsistency but guess that seeing, high level clouds etc might have an impact? I'm using the ASIair - the orginal (white) one. It's great when it works well, it's a pain in the backside when it doesn't! I'm wondering if it's an ASIair power issue, mine is regularly throwing up the low voltage warning, despite the power pack I'm using for it being comfortably over what it requires...and I guess tha
  5. Hello everyone! How well do people manage guiding with a Star Adventurer? I'm struggling - the RMS error lines for RA are a roller-coaster no-one would want to go on! Is there a way of calculating how much guiding error I can get away with at different focal lengths before it starts impacting my frames? I'm hoping to image at longer focal lengths with this setup soon... I'm getting distinctly average (though not exactly crisp) frames imaging with a Canon 6d at 85mm, controlled by an original ASIair. Background info: It's a reasonably well balanced set up (in that neither
  6. Hey Rickwayne, yes that makes sense, and as you and Theropod suggest, I'm definitely tinkering with ways of tightening everything up - thanks again!
  7. The Svnony kit is tempting, I must admit, and at that price as you say, it's barely more than what I'd pay to rig up my finderscope set up. I only went down that route because I have a 50mm finderscope sat in a box not doing anything. Something like that would certainly see time saved, I think. I've attempted to employ the 50mm finder that I had and have been doing some tests on it, but it's helpful to know what plan 'b' is if that doesn't work out - thank you!
  8. Thanks rnobleeddy, that's really helpful to know - I've been testing out the 50mm finder as a guider in the little mount it comes in and it seems reasonably sturdy, but the guiding accuracy isn't great, so I'm pondering something like this as a way of being sure to eliminate possible flexure. Of course at the moment I can't decide whether the difficulties I'm having are related to how I'm setting the kit up, my polar alignment, the wild lack of understanding I have about PHD, or possible flexure from the finder guider, but I guess that's all part of the learning curve!!
  9. Ah fab, thanks for that Gaz, that's helpful to see. How do you find it?
  10. Thanks Rickwayne, I think you're right, it's a case of giving it a go and seeing how it works out! Those rings look good and sturdy so it's good to know there's a 'plan b' if the finderscope holder proves to flex too much - thanks for the suggestion!
  11. Thanks for that Terry. Does your ASI 120mm screw directly onto that adaptor?
  12. Thanks Budgie - that's really helpful to know. I wonder if there's a way to eliminate the possible areas of flex? I could wedge something into the mount that holds the finder / guider, so that it doesn't have any wiggle room, perhaps. I'll have a play around! Thanks again!
  13. Thanks Dave - definitely not worried about how it looks! DIY is not my strength sadly, but I had wondered if it was possible to cobble something together and lash it to the main scope somehow, so I'll look into this - thank you!
  14. Has anyone had any success in adapting a 50mm finderscope for use as a guide scope? I have a stock 50mm finder that came with a recently acquired Skywatcher ED80 and I'm thinking of using it as a guide scope. A couple of follow-up questions on this... I've seen the various adaptors that enable the finder to take a guide cam - presumably these are sturdy enough to do the job and will hold a guide cam securely? And how would you go about mounting it? I've read a couple of reports that say the stock finder-scope holder (that has the two screws and one spring-loaded pin) isn't goo
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