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CFF Classical cassegrains - Any star test available?

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54 replies to this topic

#51 starman876

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Posted 29 August 2019 - 02:49 PM

I don't have the number right now but I remember over 100 to 110mm actually. 

I do have a big wynne corrector that should be about to handle that, but all that weight up front will probably require some major mods.

 

I know Val uses the AP CCD67T reducer. I wonder if the Optec 0.5 or 0.3x would be possible with a small sized chip (doubt it though).

I have the optic reducer.  Would be interesting if it would work with the F20?  I also have the AP reducer.  Will be playing this weekend should the weather cooperate.   You go to love scopes like this.  They are what dreams are made of just when you look at them



#52 Rouzbeh

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Posted 29 August 2019 - 03:31 PM

Would be very interested. I emailed AP and they said the reducer should work. They said the reducer passes what is on the input side without altering it.
Mine will be the f15 version so ends up as f10.
0.5x would be better but I'm not sure it would be possible.

#53 Alterf

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Posted 29 August 2019 - 03:38 PM

The AP reducer takes mine from f/13.5 to f/8.1. How much reduction depends on the spacing.  I use a pretty small chip with only an 11mm diagonal.

 

Val



#54 Rouzbeh

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Posted 29 August 2019 - 03:45 PM

F8 is much better, typical RCs are f8. Id guess f10 would be painfully slow.

I just ordered a qhy183mm cooled. Mostly for lunar but maybe with a reducer for planetary nebulae.
I'm seen people take amazing shots with modest gear and lucky imaging dso.

#55 starman876

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Posted 29 August 2019 - 08:13 PM

Imagers can only process what is available from the optics.  Can not get something from something that is not there.  You can't make that stuff up smirk.gif




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