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Buy .965 or get adapter?

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#1 JJack

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Posted 29 July 2020 - 09:51 AM

I have an old (classic?) Bushnell 700mm fl 60mm scope that I only have one .965 eyepiece for, so I'd like to get some new ones.

 

Rather than buy .965 should I buy a .965 to 1.25 adapter so I can use my current eyepieces?  Any downside to that?

 

I know it's not an expensive scope but it's my first one so I'd like to use it; optics look good through that one Plossl I still have.

 

 

Also appreciate any advice about which 2 eyepiece sizes to buy.

 

thanks much


Edited by JJack, 29 July 2020 - 09:52 AM.


#2 JJack

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Posted 29 July 2020 - 09:58 AM

I see that Seibert Optics has a barlow that will accept 1.25 eyepieces (I think...) and fit into .965 scope; any thoughts on that?



#3 Jim Davis

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Posted 29 July 2020 - 10:01 AM

You could buy a .965 to 1.25" diagonal like this one: https://optcorp.com/...mirror-diagonal



#4 MJB

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Posted 29 July 2020 - 10:05 AM

I'm not familiar with this scope - is there an adapter that screws into the focuser tube and is then is .965 to insert the diagonal? If so, you might be able to get a new piece here that will allow you to use a 1.25" diagonal. I did this recently with an old  refractor - I was able to get a Vixen part that did the job. If you enjoy the scope it's not too much of an investment to make it more versatile.



#5 JJack

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Posted 29 July 2020 - 10:48 AM

You could buy a .965 to 1.25" diagonal like this one: https://optcorp.com/...mirror-diagonal

I think that would work - do you think there's any downside optics-wise if I go to that setup?  Just wondering if the light scatters or any other negative things (I don't even know what questions to ask).

 

But, yes, that would fit as I just checked that 

 

Appreciate your thoughts



#6 JJack

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Posted 29 July 2020 - 10:49 AM

I'm not familiar with this scope - is there an adapter that screws into the focuser tube and is then is .965 to insert the diagonal? If so, you might be able to get a new piece here that will allow you to use a 1.25" diagonal. I did this recently with an old  refractor - I was able to get a Vixen part that did the job. If you enjoy the scope it's not too much of an investment to make it more versatile.

 

Not sure about an adapter but there diagonal is a screw-in with a .965 (or thereabouts) size 



#7 oldmanastro

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Posted 29 July 2020 - 11:10 AM

A 1.25"/ .965" diagonal is the better option. Placing an adapter on the .965" diagonal may not allow the use of some eyepieces unless the focuser has a draw extension tube for rough focusing.


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#8 MJB

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Posted 29 July 2020 - 03:48 PM

I agree a 1.25"/.965 diagonal is a good way (and possibly easiest) way to go. I mention an adapter because I was able to use this:

 

 https://www.bhphotov..._to_31_7mm.html

 

That meant I could use my existing 1.25" diagonals and not have to get a diagonal I could only use on that scope. Not knowing the OP's scope focus tube setup, I can't say if that'll work, but the Vixen adapter seems to be suitable for a pretty broad range of Japanese refractors.


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