Struggling to Focus with New Telescope? Here Are Some Tips!

  • Context: Stargazing 
  • Thread starter Thread starter Sheneron
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    Telescope
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SUMMARY

The discussion centers on optimizing the use of an 8-inch Dobsonian telescope, specifically addressing focus issues with a 30mm eyepiece compared to a 9mm eyepiece. Users suggest that the focus point being too far back is common and can be corrected with extension tubes or a diagonal. Observers also emphasize the importance of acclimating the telescope to temperature and avoiding light pollution for clearer views. Proper collimation is highlighted as essential for achieving optimal performance, with recommendations for using a collimator cap or Cheshire sight tube for accuracy.

PREREQUISITES
  • Understanding of telescope types, specifically Dobsonian telescopes.
  • Knowledge of eyepiece magnification and its effects on viewing.
  • Familiarity with telescope collimation techniques.
  • Awareness of the impact of environmental factors like temperature and light pollution on astronomical observations.
NEXT STEPS
  • Research the use of extension tubes and diagonals for improving focus in telescopes.
  • Learn about collimation techniques using a Cheshire sight tube and collimator caps.
  • Investigate methods for minimizing light pollution during astronomical observations.
  • Explore the effects of temperature acclimation on telescope performance and viewing quality.
USEFUL FOR

Astronomy enthusiasts, amateur astronomers, and telescope owners looking to enhance their observational skills and optimize their equipment for better performance.

  • #61
Perhaps Redbelly 98 has a good point. It may be better to purchase one than build. I'm am/was an engineer so I have this propensity to 'assemble things', and just assume everyone else does the same. Which is a bad assumption on my part.

Although, Baader does enclose directions on how to make a solar filter with their material.

I have used both the Baader 'milar' type filter and glass. I (and this is only a personal preference) preferred the 'cheaper' plastic filter.
I found the glass scratched easily and did not give the same 'white light ' clarity.

Of course you still have to be careful with the Baader film and not stretch or puncture it.

Again I concur with Redbelly98. If you purchase a solar filter be careful with it.
Don't take any chances with your vision.
Barbecuing ones retina is definitely not cool.

However, in fact I had my 10" scope out today with the solar filter on. I bought a new Canon camera yesterday and was trying it out. No sunspots though.


In Barlow lens I have three, a 2X, 3X and 5X. Out of those I use the 2X most frequent when I use a Barlow. I suppose actually the 5X is then next in line. I like to use it at times with the 32mm PLöSSL eyepiece.
Although, I don't think I would recommend a 5X for people just getting into astronomy.

Good EPs are expensive, so it's a good idea to choose a high-quality Barlow, and choose the multiplicative factor carefully so that you can get a wide range of powers with a modest number of EPs.

Could not have said it better myself. :-)
 

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