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Post by Ronny on Jan 11, 2014 14:51:40 GMT
I have always good reasonably sharp views through my Celestron NexStar 8SE using my normal viewing lens however when I connect my Nikon D3100 with the T adapter to my scope I find the views will always be slightly out of focus. When I take the photograph it will also always be slightly out of focus. You can see what I mean when you click on these two photographs, slightly out of focus. Even the chimney pot from about half a mile away is disappointingly out of focus. Am I doing anything wrong or are my expectations just too high?
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Post by stevie on Jan 11, 2014 16:27:00 GMT
I think the chimney pot image is excellent :-)
Seriously, this is one for Jonathan or Gary, I wouldn't have a clue.
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Post by jonathan on Jan 11, 2014 18:53:05 GMT
Don't know what is going wrong there Ronny I was reading my camera manual and found out that there are different settings you need to input for non cpu lens ie the telescope so you can input the correct f ratio and lens size, must try this on my scope some time.
The only other thing is the thermal balance of scope and ambient temperature although this would easily be solved by letting the scope cool down before imaging,hope this helps
Jonathan
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Post by Ronny on Jan 11, 2014 20:15:39 GMT
I'll have a hunt for no lens settings. Cheers Jonathan.
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Post by jonathan on Jan 11, 2014 20:32:01 GMT
hope you find a solution Ronny i know how frustrating it can be when equipment gives problems.
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Post by garyr on Jan 13, 2014 11:14:00 GMT
I don't know so much about Nikon because I use a real man's camera ... however the method I use for focusing is to use the digital zoom option on the live view. I basically get everything set up and pointing to the object then I use the digital zoom on the live view to zoom in x5 and focus until the image on the live view is perfect. I then up it to x10 and repeat the process. This usually gives me perfect focus. I tend to do this on a very bright star rather than any DSO as its easier and they all reside at the same focus anyway.
Also when I do anything with my scope and camera during the day it always seems to be slightly hazy ....
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