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yelsac

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    254
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About yelsac

  • Rank
    Star Forming
  • Birthday 02/02/74

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  • Gender
    Male
  • Location
    Isle of Wight
  1. Really interesting As I understand it (according to my optician) astigmatism means your cornea is a little cone shaped rather than curved as normal. I suppose it will probably get worse the older we get! thanks for the comment
  2. Brilliant Many thanks for the info
  3. Thanks for all your comments. Probably a silly question but does having an astigmatism mean that the object I'm viewing would be slightly blurred? My eye prescription is R -5.50/-0.25 30.0 & L -4.75/0.75 40.0 Not to sure which one of those figures describes the astigmatism although I was told it is mild. I've always just used contact lenses (hard gas permeable) when viewing so I presume they don't correct the astigmatism only wearing my glasses will is that right?
  4. Quick question I've been thinking about for a while- I'm short sighted & I have a slight astigmatism in both eyes (awful eyesight!). I normally wear contact lenses but have (thick lensed!)glasses to. So my question is when observing through a telescope will my astigmatism effect the image I'm seeing? Also would it be best to view with contacts, glasses or without either? thanks yelsac
  5. Hi I've had a couple of 450d's & I have to be honest the mini usb connector is notoriously weak! I had exactly what you are describing an intermittent connection. In the end both of mine gradually separated from the main motherboard, I had to move over to one of these http://www.ebay.co.uk/itm/Timer-Remote-Control-Shutter-Release-For-Canon-600D-60D-550D-500D-450D-700D-70D-/112453258280?hash=item1a2ebc8c28:g:Rg4AAOSwyWZZTIey
  6. Yes found it Brilliant many thanks
  7. Yes I think my son put a light on! but its not a massively bright light so shouldn't effect the setup except I noticed the DSLR was pointing back towards the house! I was just wondering if anyone else had experienced this & if indeed its the DSLR's viewfinder causing it
  8. Hi Can anyone tell me why I've got this funny stray light on some of my subs??? I've got a great big dew shield on my scope which is pointed heavenward, most of my subs are ok but I have a few that have this strange shaped orange light at the top end of the picture. The only thing I could think of is maybe some light is getting in via the DSLR itself. Could this happen? Is it coming through the DSLR's viewfinder or something? If so any ideas how to stop it? Sorry so many questions but after struggling for over an hour to sort a problem with setup I was pulling my hair out anyway & then this GGGRRRrrrr!
  9. Just had a look at some of your pics wow!!!! totally awesome. Probably a stupid question but you said you don't use dark's by using dithering but do you use flats or bias frames?
  10. brilliant many thanks
  11. Hi Thanks for the reply I set the dithering distance to 3 in APT & also raised the scale in PHD2 to 2.0. I can certainly see the difference between subs(they do move around). Am I right in thinking that if the dithering is done right there is no need to take any darks at all? Mind you not sure how I'd know the dithering was moving enough! I'll have to keep an eye on the Settle time to, at the moment its set to 15. thanks again for your advice
  12. Just a quick question What settings do you guys (the experts) use in the APT guiding section for dithering when filming with a DSLR? I use good old PHD2 with a guidecam. I really want to know how much of a dither is required to get the desired effect. thanks
  13. Canon 450D for imaging

    You can even use the Canon Utility 2 software that comes with the camera (Free!!)
  14. D shaped stars

    Hi I've the same problem with my 150p can I ask how much you cut off the focuser barrel? also have you noticed it effect the performance in any way either in visual or astrophotography? Basically is it worth doing? thanks
  15. Last few items for sale

    I'll have the Anti-mar Compression ring adapter for Newtonian focuser. VGC £18 delivered Let me know if thanks
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