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Cannot reach focus with Newtonian F/5 150mm with filter wheel on Venus

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#26 astroflak88

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Posted 14 June 2021 - 04:25 PM

I looked at that website all I have to say is wow especially on the details of the clouds of Venus using the dobsonian you can't get that kind of detail of the clouds using a c14 due to the corrector plate is what I am reading from various forum posts.


Edited by astroflak88, 14 June 2021 - 05:17 PM.


#27 sixela

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Posted 14 June 2021 - 05:11 PM

That's an IR plus UV composite -- nothing that you can get without separating the wavelengths and filtering aggressively in each band.

 

Of course getting good seeing in UV with a planet that doesn't rise high requires a tremendous amount of luck too!


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#28 astroflak88

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Posted 14 June 2021 - 06:40 PM

That's an IR plus UV composite -- nothing that you can get without separating the wavelengths and filtering aggressively in each band.

 

Of course getting good seeing in UV with a planet that doesn't rise high requires a tremendous amount of luck too!

That was a pretty good image of venus and he used a 10" dob to do that, imagine a 16" dob how better it would look? I dont see any photos on his site how he went about the filters and installing them.



#29 sixela

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Posted 15 June 2021 - 02:47 AM

He uses a barlow (he’s got several ones) then filter wheel then sometimes ADC and then the sensor, IIRC.


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