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RobertI

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About RobertI

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    Near Colchester

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  1. Nice report Chris, I reckon 6" is the sweet spot for many of the nights we get. Glad you managed to get out and have a good session. I had a brief session last night too and the conditions were very good once Jupiter had risen to a decent altitude. I tried the new 7mm eyepice in the Tal config giving 140x and the detail was very good indeed (floaters not a problem for me at this mag) with orange GRS easily visible, numerous belts visible and two prominent dark festoons in the North Equatorial Belt.
  2. @Moonshane that's a lovely piece of kit, would love to have a look through that. Did the EQ5 handle it ok (guess it must have!)? It doesnt look like Orion Optics make this scope anymore so a nice scope have bagged. Sorry @jetstream what is MTF? If you are seeing spikes Chris, I think I know where you are going wrong!
  3. Just an addendum to this thread, I have realised that my two Baader fine tuning rings coupled to my Hyperion 10mm will give me three possible focal lengths of 6mm, 7mm and 8.5mm so I can experiment to my heart's content to find the optimum planetary mag for the Tal100RS under good seeing conditions. I shall report back on my findings, if I ever get a clear night.
  4. Thanks for all the replies, very helpful, sounds like a 7mm should do the trick, I've just remembered i have fine tuning rings for the 10mm Hyperion which will take it down to around 8mm I think, so although not a solution, it may help to confirm I am moving in the right direction with floaters/brightness. The Vixen SPL's look good on sale, but even at that price they are almost as much as I paid for the scope! What are the Skywatcher Planetary UWA like? Bit more in the range I was looking at. @Louis Dif floaters continue ti bug me then I may look t the bino route, I have aways fancied some and never realised the anti-floater properties. Thank you
  5. I was recently viewing Jupiter using my Tal100RS, but unfortunately I have a limited range of eyepieces so I was either viewing with the 5mm BST Starguider (giving 200x with exit pupil of 0.5mm) or the 10mm Hyperion (giving 100x and exit pupil of 1mm). At 200x I felt that there was plenty of detail to see, but a combination of dimness of the disc and floaters in my eye was making the detail hard to spot. At 100x the image was brighter and floaters less of a problem, but the disc was too small to see the level of detail which I felt was achievable for the good seeing conditions. So my question is what size eyepiece would be a good middle ground? I was thinking possibly 7mm giving 140x and 0.7mm exit pupil (there seem to be a limited range of 7mm eps available). Would this be a good enough improvement? Would I get a brighter image using better/different eyepieces, meaning that 6mm might be achieveable? As far as budget goes, I guess I don't want to soend too much on an eyepiece for this scope, so premium eyepieces are not really an option. Any thoughts on best sizes and types/makes to get me better views of Jupiter with the Tal 100RS would be appreciated.
  6. Glad you got to appreciate a big dob @tomato, I am slightly jealous! M13 must have looked incredible, its pretty amazing through my 8" SCT. This is one of the things that I like about EAA (aka Video Astronomy). I started with EAA due to poor skies at my previous house and although the laptop experience is not quite the same as visual, the detail which can be recorded whilst at the scope, after just a few seconds in some cases, is incredible, particularly for faint fuzzies like galaxies. And best of all NO POST PROCESSING.
  7. Thanks for posting your results Don. Those are pretty severe abberations, interesting to see what spherical abberation looks like though! Interesting phenomenon with the focussing too, would like to know why. Not sure I'll be trying funstar though. Thanks again for doing this.
  8. Very nice setup, you should have lots of fun with that. My main visual setup is also a C8 on a Skytee II, sometimes with the Tal 100RS on the other side (kindly provided by @Chris Lock). A really simple but effective setup. Would be even nicer with a Berlebach!
  9. Doesn't sound promising, thanks for sharing your first go.
  10. Having looked at Nytecams 's post on the CN thread and done a bit of research it seems that spherical abberation isn't the type of abberation which is restrcited to edges (as I thought in my earlier post) so the result will probably be large stars, even in Ha? I am guessing that, although the corrector plate ciorrects for spherical abberation, it is designed to correct for two spherical mirrors, so if one is removed, the correction is gone, or new abberations introduced? So presumably, stoppjng down the scope would not help either as the presence of the corrector means its not a simple spherical abberation issue any more?
  11. Hello Marie, welcome to SGL. Your enthusiasm is going to get you a long way so keep it up! As an astronomer of 35 years I still use my 10x50 binos for viewing and am always amazed at the views you can get. Beware that not all binoculars are good, and there are many virtually useless makes out there. You will get terrific advice in the bincular section. I would certainly advocate going to a local club ahd having a look through some member scopes before buying one, although you will get good very advice here. Perhaps check out a star party near you?
  12. Thanks @stash_old for pointing this out and @HiloDon for offering to try this out with the Lodestar - very interested to see how this turns out. If the distortion is restricted to the outer edges of the field, it could be fun to give it a go. I just had a look at my C8 and unscrewed the secondary, and although the fitting is not SCT (the diameter is slightly wider) it looks easy enough to fit a visual back if one could find the right sized washer - I'm guessing even that would be pretty hard though! But funstar looks a nice little product, watching with interest.
  13. Yes. i do this with the Lodestar which has a smaller field of view. I do the whole thing from indoors, firstly using the finder+webcam+sharpcap to do a rough align and get the star into the FOV of the Lodestar, then do accurate align using the cross hairs in the Starlight Live software. Works well.
  14. Thanks for the update Chris. I like the pictures by the way, the action shot of the scope pointing at the moon, and the other shot with the dob peeping out from behind the shed door, as if trying to get into the picture too! I guess for many of us, much of the joy is in the ownership, as well as in the use. It's a real shame that this scope is not yet giving you much ownership satisfaction. Really appreciate you being an 'early adopter' and trying this new scope out for the benefit of us all.
  15. My that is a long scope! Hope you get a satisfactory response from Bresser, watching with interest.