Hi everyone,
I have been using my 12 incg go to dobsenian. Unfortunately, i am not able to get sharper images while watching jupiter, when i am using a combination of 2x barlow ans 0.10 mm lens.
Please guide.
Regards,
Srikanth V
Hi @vittala.srikanth, does this problem persist with other eyepieces? Or is the image for this particular combination of eyepieces not getting focussed even with the focusser?
Hi,
Combination 1 - Used 2X barlow and 0.25 mm. Image is ok. But not to my satisfaction. Its ok but not sharp.
Combination 2 - Used 2X barlow and 0.10 mm. Image is too blurry. I tried adjuating the focusser.
I have a 12 inch dobsenian and given the size, i thought the image will be sharper.
Hello @vittala.srikanth,
I’m hoping you may have already considered these, but these some common pitfalls so, I’ll suggest anyway especially because you mentioned you were having a problem with the 25mm eyepiece as well.
- Unfortunately the bigger the scope it takes longer to sync with the outside temperature. So, allow the scope to cool / warm further.
- Remove the Barlow and check if you still have the problem.
- Check with the same Barlow+eyepiece combinations in another scope (hope you find someone who has a similar or a larger scope)
- Check with and without the fan being on (some of my mates who have better eyesight than me have always complained about fans being on whilst observing.
- Ensure the scope is stood solid and stable if you’ve modified it to have more than three anchor points.
- Collimate it again with a star. Remember bigger the scope and bigger the magnification, bigger the errors are too.
All the best, let us know how you got on.
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