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almcl

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About almcl

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    Telford, Shropshire

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  1. There's an upgraded handset available which gives x16 But to get really fast slews you probably need something like the Astroeq mod with stepper motors. I tried this on my EQ5 and the 800x is seriously fast. Plus you get GoTo as well.
  2. Well done, you have captured quite a number of galaxies there! The Astrometry.net plate solve list is so long I stopped counting. If you are able to take some flats there might be even more waiting to be teased out.
  3. Well, depending on what interests you, the Virgo cluster of galaxies can be quite rewarding in wide field... They are quite well positioned at the moment.
  4. Many thanks, Stu. Must look a bit more closely at SkySafari! I did eventually find it in Pretty Deep Sky maps but have so much trouble navigating the files you definitely beat me hands down!
  5. Thanks, Helen. I'll give that a go (tomorrow possibly).
  6. The attached image shows a single sub from tonight of the area around 70UMa (bright star just right of centre) and M40 (a little below centre). However, there's a relatively bright star indicated by the green pointer which I can't identify. Nothing shows up in that position in Stellarium and my other star charts don't go that far down. Could someone identify it for me?
  7. Not sure I can express this simply although the explanation is simple but here goes. The use of a clock face to express the relative position of Polaris is merely a convenient scale, it has nothing to do with the rate of rotation about the pole and could as easily be calibrated in degrees. The use of a clock face with 60 divisions could be replaced by one with 120 (they might be a bit small in the average polarscope) or even one calibrated in mils, the sole function is to indicate a relative position.
  8. From the album My quest for DSOs

    I haven't done many open clusters, largely because through the eyepiece I find many of them rather underwhelming, but this image surprised me. 5 x 180 sec lights ISO 1600 30 flats 30 bias
  9. Andromeda is very close to the horizon here in UK at night at the moment and in India will probably be below it for most of the hours of darkness. Six months from now, in October or November say, it will be much higher above the horizon. If you can find and recognise the 'great square' of Pegasus, that would be one way to find it. The right hand bit of the "W" of Cassiopeia also points towards it. The other thing is don't give up, I couldn't find it at all when I first got my scope - in early May - but now, four years on things have become easier, so good luck and keep trying!
  10. Precession of the equinoxes is something I hadn't thought about, so thanks, Mike. The program appears to have been complied in 2003 so, as you say, by now there will be a difference...
  11. So, the other day while wondering if the cloud was ever going to retreat, I decided to compare the Polaris position as given by the Synscan handset with that given by Dr Jason Dale’s Polarfinder. I was a bit surprised to find they were more than 15 minutes apart. After discovering that the laptop had ‘forgotten’ the longitude for Polarfinder and correcting this, the error reduced to about 10 minutes or 1 division on the ‘new’ Skywatcher reticule. Polarfinder (as per the orange reticule image below) indicates pretty much 5 o’clock. The Synscan handset was saying 5.09. Granted this is a pretty small error, but can someone suggest a way to determine which is more accurate?
  12. The angle between the calibration axes (never been able to understand the figures that PHD lab gives - so just looking at the graph) also hint at a slight polar alignment error. How did/do you PA for that run?
  13. Have you tried a three (or more) star alignment? I find anything less than three can provide rather variable results, as EQmod needs to build a model of the offset between where the mount thinks it is pointing and where it really aimed at.
  14. I've certainly noticed the rocking you mention, Mark, but haven't had the courage to tighten the worm drives so far. Experiments have been slightly curtailed by cloud but also by a new (2nd hand refurbished) Laptop which has required a vast amount of installation of software. That and solid cloud cover, of course.
  15. I image with a Canon T5i, on a Skywatcher 200P, initially mounted on an EQ5 mount, unguided. I did move to guiding (using a cheap web cam and a finder scope to start with). There were limitations but some of the DSO images in my album here were taken with this minimal kit. Quite a few weren't that good, either, and have since added a coma corrector, light pollution filter, bigger guide scope, more sensitive guide camera, better motors and most recently a bigger mount, but for what's possible with a DSLR on long focus scope take a look at Scott Rosen's website here