Davey-T Posted April 2, 2012 Share Posted April 2, 2012 I have never tried solar imaging before but would like to try to image the transit of Venus.I have a 10" SCT, 100mm Refractor, Canon 450d, Atik314 camera and Minitron video camera.What would be the best scope, camera combination and what filtersother than solar film on the front end ?Davey T Link to comment Share on other sites More sharing options...
Bizibilder Posted April 2, 2012 Share Posted April 2, 2012 I would go with the 100mm refractor (assuming a focal length of 900-1000mm) and the 450D. That will give full disc images with sufficient resolution. You could try a green #58 filter but it is not really necessary if you are careful with the focus and exposure settings. Get yourself set up and practice - it takes a while to get consistently good results. Link to comment Share on other sites More sharing options...
Davey-T Posted April 2, 2012 Author Share Posted April 2, 2012 Scope is 600mm will it still work ?Also have 80mm x 900mm would this be better ?Davey T Link to comment Share on other sites More sharing options...
riklaunim Posted April 2, 2012 Share Posted April 2, 2012 You can use the Atik 314L+ with a refractor or a SCT at f/10 and not darker (SCT focal reducer may be handy). Plus Baader Astrosolar + Solar Continuum. Link to comment Share on other sites More sharing options...
SteveT Posted April 2, 2012 Share Posted April 2, 2012 Do you have an example of an image taken with the above combination of filters at all, as I am interested to see what it would look like, as I am contemplating a similar setup.Sent from my iPad Link to comment Share on other sites More sharing options...
Bizibilder Posted April 2, 2012 Share Posted April 2, 2012 This is taken with a SW120 APO, stopped to 100mm aparture, (focal length 900mm) and a Canon 1100D using just a Baader filter. The colour is false and is done in Photoshop. The posted image is reduced from full size - about 2/3 of full size. Link to comment Share on other sites More sharing options...
JamesF Posted April 2, 2012 Share Posted April 2, 2012 You have a couple of months. I'm sure the sun will make an occasional appearance between now and then. I'd experiment with a few different combinations and see what works for you.Are you likely to get CA with the refractor? I've not experimented with solar viewing much so I don't know if it's likely to be a problem.If you want a full disc solar image can you even get one on the sensor with any of the cameras and the SCT?James Link to comment Share on other sites More sharing options...
Bizibilder Posted April 2, 2012 Share Posted April 2, 2012 I normally use an Evostar 120 achromat (although the above image is using the APO) for solar work and have no trouble with CA (false colour fringes round the image). Link to comment Share on other sites More sharing options...
iwatkins Posted April 2, 2012 Share Posted April 2, 2012 And practise. Depending where you are in the UK on the transit morning, you'll need to be imaging as soon as the sun shows itself.Also decide what you want to do beforehand, I.e. time lapse, stills, video etc. and get it down pat. You do not want to be messing about with settings etc. once event is underway. You won't get another chance, at least not in this life CheersIan Link to comment Share on other sites More sharing options...
riklaunim Posted April 2, 2012 Share Posted April 2, 2012 Here is one with Atik and a 65mm APO:And from C11 with a DMK:(you would need a very good seeing for this). Link to comment Share on other sites More sharing options...
SteveT Posted April 4, 2012 Share Posted April 4, 2012 So what would the difference be if you added a Solar Continuum filter as well as the Baader film ?Also, which scope would be better for solar readiness C9.25 or ED80 ? (i know which is cheaper !) Link to comment Share on other sites More sharing options...
Davey-T Posted April 4, 2012 Author Share Posted April 4, 2012 Hi BizibilderWhat exposure time did you use with the Canon, to give me an idea where to startDavey T Link to comment Share on other sites More sharing options...
Bizibilder Posted April 5, 2012 Share Posted April 5, 2012 With my 1100D I use ISO100 and an exposure of 1/2000 sec or less (usually less) when using just the Baader filter. If I add a green filter (which i sometimes do) then the exposure would be around 1/400 sec. My 1000D (before it was modded) used around 1/1000sec at ISO 100.Basically use the slowest ISO you have and start with the shortest possible exposure time - the Sun is bright! (Even with a filter!!). Link to comment Share on other sites More sharing options...
Stargazing_Cliff Posted April 5, 2012 Share Posted April 5, 2012 50/60mm telescope possibly may work for solar anything higher be to close.you see lot proper solar telescopes around 50-60mm if i had some beader film i would test with my old 50mm. Link to comment Share on other sites More sharing options...
Davey-T Posted May 16, 2012 Author Share Posted May 16, 2012 You have a couple of months. I'm sure the sun will make an occasional appearance between now and then.JamesDo you want to put that in writing James ? oh you did.Time is running out, Iv'e just set up to have a go and the Sun disappeared.Are the bookies taking bets on the Sun shining on June 6th perhaps I'llhave a couple of quid on it raining and hedge my bets.Davey-T Link to comment Share on other sites More sharing options...
JamesF Posted May 16, 2012 Share Posted May 16, 2012 It's appeared here, so I'm ok James Link to comment Share on other sites More sharing options...
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