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About michaelmorris

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    Official Quiz Master

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  1. neq6 vs modded heq5

    Sorry, omited to say main scope used with HEQ5Pro is Skywatcher 80ED (original post now amended)
  2. neq6 vs modded heq5

    I guest it depends on The mass of the set up you're trying to put on top of the mount How portable you want the set up to be The EQ6 has greater carrying capacity, but the HEQ5PRO is a bit lighter and, some say, has slightly more accurate tracking I have an HEQ5 Pro which I uses with a Skywatcher 80ED + guider finder and Mono CCD + electronic filter wheel or with a dual bar and 66 mm guide scope with DSLR for imaging and either set up works great. However, from my experience this is probably as heavy as I feel happy with before weight risks becoming a (minor) issue.
  3. Mister Stargazer T-shirt

    There is one https://www.amazon.co.uk/Miss-Stargazer-Ladies-Astronomer-T-Shirt/dp/B016TJDYTY/ref=wl_mb_wl_huc_mrai_2_dp?ie=UTF8&pd_rd_i=B016TJDYTY&pd_rd_r=QMC01X5C7STZ90DM438S&pd_rd_w=boIPh&pd_rd_wg=ZAwZj
  4. Confused with how to read PA on Astrometric Eyepiece

    Okay, I've managed to answer my own question. The secondary star should pointing towards the 'Zero' end of the linear scale. http://www.jdso.org/volume6/number1/frey.pdf
  5. Confused with how to read PA on Astrometric Eyepiece

    Thanks, as with most things in life, the answer to one question raises some more! I now have some questions regarding the starting position for measuring position angle 1 - From my understanding you start by placing both stars on the linear scale with the primary dead centre along the line - Is this correct? 2 - Obviously, this alignment of the eyepiece has two possible arrangements, each of which would produce position angles 180 deg apart. - How does one deal with this? Thanks
  6. Kidderminster newbie

    Welcome to SGL. Nice to see another Worcestershire member.
  7. I’m currently working on a talk on measuring double stars for my local astronomical society. The bulk of the talk is about using an astrometric eyepiece. I think I’ve got the technique for calibration and measuring separation sorted. However, I’m a little bit stumped on one aspect using an astrometric eyepiece for measuring position angle. I understand the technique of centring the primary on the dead centre of the linear scale then letting the star drift until it the centre of the star is exactly between the two rings of the outer protractor. The problem I have is reading off the angle. Let me go back a step first. I presume that position of a star in the field of view is affected by the optical arrangement of the telescope. (i.e. is it a refractor of reflector?, Is there a diagonal? Is the diagonal a mirror or a prism?) Sorting out east from west is easy as this is already known from calibrating the eyepiece and/or measuring the position angle. However whether north is clockwise and anti-clockwise from west is, I presume, affected by the scope’s optical arrangement and is independent of the eyepiece. Q1 - Is this correct? Q2 - If the Q1 is correct, then would one then also be correct in assuming that the scale on the outer protractor in the astrometric eyepiece is only correct for one particular optical arrangement? Q3 - If the Q2 is correct, which arrangement is this? Q4 – If the Q2 is correct, what corrections will need to be made for the different possible optical arrangements of scope and diagonal? Q5 – The Celestron/Baader Astrometric eyepiece has two diametrically opposite scales on the outer protractor. Which scale should one use for the different possible optical arrangements of scope and diagonal? Thanks
  8. Cardinal Point orientation guide?

    Thanks I'm more looking for something along the lines of N SCT + Diagonal = W E S S Newtonian + Diagonal = W E N PS - I realise one or both these may be wrong, it's just for illustrative purposes.
  9. Cardinal Point orientation guide?

    I'm putting together a talk on measuring double stars and I'm struggling to find a simple idiot-proof guide to how to workout which direction is north when you already know the direction of west (This depends on the optical arrangement of the scope/diagonal you are using). Any suggestions gratefully received. Thanks
  10. Words Words Words

    Planet : To make a plan
  11. Words Words Words

    Ionosphere : Neil Armstrong's first words from the Moon
  12. Words Words Words

    A few lesser known vaguely astronomy related definitions that may amuse you *Exorbitant : The now retired first insect astronaut. *Bacchanalian : To bet on a Martian Binary : Pertaining to a waste paper basket Aurora : Alternatively it could be a lion Bolide : A dishonest medieval weapon Eclipse : Electronic fasteners Gibbous : A bit like one of the Beegees (*care of Uxbridge English Dictionary) I'll get my coat ...
  13. It's the Astroquiz at the annual SGL star party.
  14. Looks like a great product. Just one thing, is it just me or is the music in the videos much too loud, almost drowning out the narration?
  15. From what I can see, none of the scopes you mention are really suitable for astrophotography. As previously mentioned, the most important component in astrophotography is the mount. This isn't something to buy in a hurry. I would start slowly with a decent tracking mount so that she can use her existing camera and lenses to take long exposure images and learn the basic techniques. http://skywatcheraustralia.com.au/product/star-adventurer-motorised-mount/ http://www.telescopes-astronomy.com.au/skytracker_ioptron_camera_mount_photography.htm http://www.frontieroptics.com.au/iOptron SkyTracker PRO.htm I would also get her a good book on the subject https://www.amazon.co.uk/Digital-Astrophotography-Practical-Amateur-Astronomy/dp/0521700817 https://www.firstlightoptics.com/books/making-every-photon-count-steve-richards.html http://www.astropix.com/bgda/bgda.html I hope this helps