Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_dslr_mirrorlesss_winners.thumb.jpg.9deb4a8db27e7485a7bb99d98667c94e.jpg

Relpet

Members
  • Content Count

    532
  • Joined

  • Last visited

Community Reputation

460 Excellent

2 Followers

About Relpet

  • Rank
    Proto Star

Profile Information

  • Gender
    Male
  • Interests
    Astronomy, films, history books, French Resistance, sitting in the sun pondering the ineffable mysteries of life.
  • Location
    South-west France
  1. Thanks again. Michael. Having checked the camera I found the white balance was set to daylight. Fiddling in the dark I must have pressed the WB button at some point and accidentally changed the setting. The moon was clear tonight at 21.00 so I took a few shots at various exposure settings. None of them showed any colour cast Best of the bunch attached. Your advice was also helpful to a member of our local group who had noticed a similar problem so thanks again from both of us.
  2. Never thought to look at white balance, Michael. Next time we have a bright moon I'll run through the options and see what works. I had expected great things from this combination.
  3. Not an expert but I like taking pictures of the moon. During the last twelve months I've been using a Canon 500D. I spend half the year in France where I have used various Newtonians with a variety of Baader EPs but prefer to use a 2" 2xPowermate. Over Christmas I was able to get a second-hand 2" 4xPowerMate which I was looking forward to using with an 80mm TS Photoline refractor. Everything looked OK on Live View but on the computer all the images came out with a dirty brown cast. Lunar seeing was excellent. LP is very low in France but very high in Surrey, a short drive from Crawley/Gatwick. I can correct the cast to some extent through post-processing but wonder if there is something wrong with my set-up. This is a combination I have not used before so suspect there may be some inherent fault. Any ideas, anyone? Unprocessed comparisons below with France/Newt on the left, UK/Frac on the right.
  4. Thanks again, John. I just realised that by removing the ND3 element from the TS filter it would leave me with the green element to use by itself. So with the Baader ND3 permanently installed in the wedge I can then apply the green filter to the EP if that gives me a clearer view, take it away again if not. The polarising filter still comes into play in any case. Thanks again for your patience.
  5. Forecast for west Hampshire looking quite promising. This for Micheldever near Winchester.
  6. I like the Baader, Stu, and it's now a permanent fixture in the wedge so I'll never forget. The improvement was the difference between white and green and may have been only apparent as the tests were some days apart. I haven't used it under a perfectly clear sky yet and being completely new to solar can't guess how good it is or if it should be better. I look forward to comparisons if Monday works out.
  7. Especially when they told me in writing that it ain't included! Thanks to all.
  8. Thanks for putting me right about that, John. I managed to unscrew it with a toothpick. This was the question I asked TS. "I believe that the TS-Optics solar prism, unlike some other brands, does not incorporate an ND3 filter within the unit. A friend has recommended I buy one so I have ordered a Baader filter from a UK supplier. Where in the sequence should I fit an ND3 filter please?" Their reply was: "yes you are right is not incorporated. a polarizer is provided, but you can use also a ND one, as you prefer. the sequence is the same." So, it seems to me TS are missing a trick as it seems their wedge is even better value than I thought.
  9. That's why I bought the Baader ND3, Rob, after reading extensively and taking previous advice from Stu and others. As it is it looks like another significant investment to meet the needs of a special event will fail to pay a dividend. I sent an email to Teleskop-Express asking them to confirm that an ND3 filter was not incorporated in their package - which they did.
  10. I don't want to quarrel over this but attached is a picture. of the narrowband filter. Short of taking a bacon slicer to it there's no way I can see that there are two separate elements.
  11. This is the description by TS: There's no mention of the ND3 The advantages of the TS-Optics 1.25" Solar wedge: Particularly high-quality surfaces for very high contrast Enclosed housing with integrated light trap - no escaping stray light Cooling fins for quick removal of the heat 1.25" polarising dilter for screwing into the eyepiece or into the filter for continous adjustment of the brightness without without additional colouring. 1.25" narrow band interference filter dor significantly enhancing the contrast of the solar surface. Especially faculae regions are shown better. The filter has a bandwidth of approximately 40 nm and a peak at 540 nm. Now sun observation is possible with fast Fraunhofer refractors, as the chromatic aberration is removed. Especially faculae regions are shown better. The filter has a bandwidth of approximately 40 nm and a peak at 540 nm. Now sun observation is possible with fast Fraunhofer refractors, as the chromatic aberration is removed.
  12. I missed the last Transit of Mercury in 2016 and as I shall be 93 when the next one comes around I thought I'd make an investment for this year's. Never having done any solar observing a fair amount of research was needed and it was quite clear I could spend either no more than two week's state pension or a couple of years' worth. As I was going to be in England for the transit and being very familiar with the normal ghastly weather in an English November the more modest amount seemed appropriate. After looking at various Herschel wedges the TS-Optics seemed the best value for what might be a one-off experience. It seemed similar in design to the Lunt but came with polarising and narrowband filters, extra costs with the Lunt. On the other hand the Lunt came with a ND3 filter pre-installed. Looking further into this it seemed the ND3 filter in the Lunt could only be removed by voiding the warranty and breaking some kind of seal. So, I bought the TS-Optics job to see how I got on with it just using the supplied filters. There was a bit of sunshine around the day after it arrived so taking all the necessary precautions that I had read about (and taken to heart) I lined up my TS-Optics 80mm Photoline refractor using a variety of eyepieces and both filters. Seeing a green sun was a bit unnerving but I was getting sharp focus down to 5mm and the polarising filter did the job of adjusting the brightness level by simple rotation of the eyepiece. However, further reading suggested that the ND3 filter would improve the observing experience so I bought the Baader filter from FLO. The eyepiece holder is removable from the TS wedge so I was able to screw the filter into the interior of the eyepiece holder effectively between the prism and the eyepiece itself. So, it can either be a permanent fixture in the wedge or removable if I want to use it elsewhere. Today the sun shone again, albeit through some thin haze, so I was able to try the new combination. Now I know what they mean by white light. It was a revelation. I'm not experienced enough to know what perfect conditions are like for solar observing but I have high hopes now when conditions are better. Focusing down to 3.5mm using a SW7mm with a 2xBarlow suggested that when there is something to see like sunspots I stand a good chance. Sadly in south-east England the chances of seeing the Transit of Mercury next Monday seem ever more remote. Thanks for reading.
  13. A respected forecaster said recently that their 10 day forecast was as accurate now as their 24 hour forecast was a few decades ago. Fingers crossed. A 30 minute break in the cloud will do me.
  14. Not much chance in Dorking judging by the latest forecast. Is there any place in England that has a positively sunny outlook for 11th November, please? I'd quite like to see this transit as I'll either be aged 93 or fresh stardust when the next one comes around.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.