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LDUNN1

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Everything posted by LDUNN1

  1. I have not read all the posts in this thread, so maybe someone else has suggested this as future development already, but just in case.... ......one of the features of Calsky that I like is that I have set it to email me with 'clear observing' opportunities. So a day or so before the clear patch I get an automated alert & can make suitable arrangements & preparations in advance. Could you consider a similar feature?
  2. Just a thought, but as a dedicated astro weather site, wouldn't it make more sense to split the 24 hour period per row at midday rather than midnight? That way you get all of one night on a row, rather than having to look at one row for the night up to midnight, and the next row for the following days small hours. .....maybe have a toggle to offer the split at midnight or at midday, that way it can be tailored for both nighttime observers or daytime solar observers. Just an idea, anyone else have an opinion on the above?
  3. Brilliant idea! This is always a source of frustration, going to multiple weather sites and getting multiple responses, some of which are not astro specific or minded with their forecasts, so it's great to see one being added that is. Cheers FLO!
  4. LDUNN1

    DSO

  5. LDUNN1

    20120810 M16 TH

    From the album: DSO

    460EX mono (3rd light with my first dedicated astro CCD & LRGB imaging) I think subs were:- 4x300s 2x2bin RGB 4x300s 1x1bin L no darks no flat lights no bias
  6. ......hope you didn't mind me adding my post Qualia, to your blog.....I think when I did I must have thought I was posting in an open forum, not someone personal blog!!! So apologies for that, but I did think it was applicable having just done a similar observing session to yourself. I must give the other double double that your report covers - if I can find them!! They sound really nice from your report.....thank you, this sort of sharing of experience is really helpful to discovering new things to try & to look at, much appreciaet you taking the time to post in the first place, regards, Lawrence
  7. My last session was a visual 'grab n go' on the 11th July. I am a newbie to splitting doubles. Here are my notes from that night specifically on the doubles that I posted on my local observing groups forum:- "I spent a fair bit of time playing split the lyra double double at progressively lower mags. The C102 is 500mm focal length, I started with the Nagler 3-6mm zoom at 3mm & it was a relatively easy split, then I progressively zoomed out, I was still splitting it at 5mm, but it got very tough at 6mm I had to really take my time with it & not touch the scope at all, but I could just about still split both at 6mm - thats at a little over 80x mag. I read on SGL somewhere that someone managed to split it at 60x - that will be real tough for me I think, but I' like to try that on my AP - it's better optics to the C102 might help. Feeling confident at my double splitting I had a go for the first time at splitting Zeta Herculis, but the relatively bright star looked a bit bloated by now, looking like I had a surface starting to dew up, so as hard as I tried, I can't say I made the split - it is a tougher split that the lyra double-double though. Maybe one for another night & get in early before things start dewing up. Good fun splitting doubles mind - & the zoom is a really nice tool for the job as you can establish the split & slowly zoom out maintaining the split to the point where you struggle."
  8. LDUNN1

    Other Users work

  9. Nice! that looks like it is a very nice target!
  10. Any PPing on that Keiran?
  11. LDUNN1

    M51 1200

    excellent feedback Shaun - many thanks......I have a tendancy to over do things on the PP side. I'll take a closer look at the points you identified & have another play. Cheers!
  12. LDUNN1

    M51 1200

    13x5min at 1600iso. I've probably over processed, I've been trying out loads of new things on the processing side. the result looked 'okay' when I was doing it, but it looks like the shrinking to 1200px & jpg compression has done horrible things to the IQ......it now looks like a water colour!!! I'll have to play some more with it.
  13. LDUNN1

    M51 1200

    ......taken on 9th/10th Aug 2011 from my back garden......M51 is a bit low for imaging, & disappeared behind some trees, so I had a limited number of subs......& a fair bit of light pollution......not a good mix really, still it helps develop the post process skills that I know I am short on......
  14. LDUNN1

    M51 (again!)

  15. ......well spotted opportunity - great positioning of the Moon & Jupiter! Love it!
  16. ......I'll wait till I have a bahtinov mask before I do that test....just to ensure I get the infocus one right! ......I will do this though, & would really appreciate the analysis - if indeed there is an issue. ......your closing line made me laugh out loud - I hadn't thought of it that way!
  17. .......oh yeah, btw Martyn, I DO have liveview on my camera, & I STILL can't get focus right ;-)
  18. "Nice thing about your out-of-focus star is that it proves you have a triplet apo" ......ahhh, my secrets out, the out of focus was intentional ;-) ......It has proved a useful test actually, apart from the OOF issue, the full image shows only a little vignetting around the sides/corners......& I suspect that most of this is due to the adapter used to join camera to scope. The full image was very usable except for the very outer edges, & this is one reason I went for this type of scope - it is one of the few that can fully illuminate a full 35mm sized negative (it actually can do better than that). I have mailed the 'scope manufacturers as they do special adapters for Canon Eos cameras that should eliminate any vignetting due to the adapter I am currently using. They also do a telecompressor (0.75x) & field flattener......The compressor will come in handy, as the scope is relatively slow/long at f9, but I don't know if the field flattener is worth going for yet......although it does seem to me that there are some mis-shaped stars towards the RHS of the image.....but that might be indicative of a collimation issue???? It is funny that you saw RAF roundel's, I saw donuts ;-)
  19. Cheers Martyn - I had not heard of that type of Mask b4......i just googled it & found:- "As the images merge as you get close to focus, the exact point of best focus can sometimes be difficult to determine." "As the aperture is stopped down with the mask, the focal ratio increases. A 4 inch f/8 scope will become a 2 inch f/16 scope with a Hartmann mask with 2 inch holes in it. As the focal ratio increases, so does the depth of focus. So focusing with the Hartmann mask is less critical than the actual focus when the mask is removed. This can lead to a false sense of security and accuracy. " "I don't really recommend using a Hartmann mask anymore since the development of the Bahtinov mask, which is superior for helping attain focus." ........interesting, as I had never heard of this b4, but I am glad I'm going with the Bahtinov!
  20. ;-) it does look like that doesn't it! I am amazed on how '3d' it looks, to my eyes it really does look like a ball of diamonds. Just wish I had nailed the focus, USM can only get you so far......still in a week or two I should have the focus mask, so that will help, I have also ordered the SW electric focuser, don't know if I'll be able to modify it to work on my 'scope, but it seemed like it was worth a shot.....scope is hard to focus as image wobbles like jelly when I touch the focus knobs. Last night was really just meant as a 'shake down test' of my kit after some major re-arrangements due to the issues I've been having, so any imaging was just a bonus!
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