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Diagonal and red dot finder question

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#1 ryansmonacles20

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Posted 17 September 2020 - 12:44 AM

Is the Orion ez finder red dot viewfinder good?

 

I need a diagonal since it’s frustrating to see an object upside down and was wandering if it made a difference which diagonal to use. 
 

Thanks. 



#2 Redbetter

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Posted 17 September 2020 - 01:43 AM

It is overpriced.  Unless there has been a major change (other than some recent cosmetic upgrades), this is effectively the same as the Celestron Starpointer RDF (and there are generics as well.)  It can suffer from the same potentiometer switch problems (I know because I have experienced it with one of the EZ Finder that came with a used scope.)  The thumbscrews were a nice improvement for removing and re-attaching.  

 

The Celestrons vary in price.  I have seen them as low as $12 in recent years, and they are presently around $17.  So you can get two, with one serving as a backup, and still have money in your pocket compared to the Orion.  The pots are the weak point.  Some times they have to be switched back and on to get them working, other times I have to flick the finder or squeeze the sides to get it to work.  It is fussier in cold weather.  I haven't had one truly die yet, although I have had ones that stopped working for a time...one for long enough that I called Celestron for warranty replacement...and then it started working the next night I tried it.



#3 sg6

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Posted 17 September 2020 - 02:04 AM

For RDF I was told years ago that the William Optics were the one to get, so I got one and it still works.

 

Will an RDF be what you want? You seem to have a Newtonian and you still have to sight alone the OTA. Some don't mind, others dislike that aspect.

 

Diagonal. If you can fit one and if one will work get a 2".

Actually makes no sense - if you have a newtonian I don't think you can easily fit one. They weren't really intended for diagonals. I doubt you have the optical path available for a diagonal on a newtonian.

 

If fitting elsewhere - the finder? - add that in, but then it will be "Go buy an RACI".



#4 Avgvstvs

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Posted 17 September 2020 - 02:50 AM

I use a metal multi target red/green finder

https://www.bintel.c...?v=322b26af01d5

Works well, but you may also need a multi finder bracket to hold it

You want an erecting prism not a diagonal to flip your image for terrestrial type viewing

In the heavens, up down and left and right are not really needed and will just degrade image quality


Edited by Avgvstvs, 17 September 2020 - 02:53 AM.


#5 DLuders

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Posted 17 September 2020 - 02:51 AM

Yes, you could consider a Right-Angle Correct-Image (RACI) finder scope, like some of the Orion models shown here.

 

For your main telescope, you could consider getting a 45-degree Diagonal (which will give you upright, non-reversed image for terrestrial viewing).  Or, you could consider a more-expensive prism-type 90-degree diagonal.  See the various models on this Orion webpage.  smile.gif


Edited by DLuders, 17 September 2020 - 02:54 AM.


#6 clearwaterdave

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Posted 17 September 2020 - 03:36 AM

Yes, you could consider a Right-Angle Correct-Image (RACI) finder scope, like some of the Orion models shown here.

 

For your main telescope, you could consider getting a 45-degree Diagonal (which will give you upright, non-reversed image for terrestrial viewing).  Or, you could consider a more-expensive prism-type 90-degree diagonal.  See the various models on this Orion webpage.  smile.gif

He's got a dob.,No diagonal is going to work.,as for the reddot I would replace it with a laser pointer.,but that's me.,


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#7 SloMoe

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Posted 17 September 2020 - 07:41 AM

Red dot finders, Telrad runs to the front of the line all the time as the recommended but it takes up a lot of real estate  on the scope, I have only had about 8 of them, still have one, also in the same price range is the Baadder SkySurfer-III, I like mine, battery seems to last longer than some of the other button battery powered ones, 

 

Keep checking the CN classifieds, RACI 50's come along all the time at around $50



#8 Voyageur

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Posted 17 September 2020 - 09:38 AM

Are you talking about the view through the finder or the main scope? I'm assuming finder.

 

So... when you say "diagonal" do you mean a right-angle finder scope? That's not called a diagonal. A diagonal goes into the focuser of refractors and SCTs and directs the light path to a more ergonomic viewing position. Diagonals are not used with Dobsonians.

 

A lot of people like RACI finders. I prefer a Telrad and/or a green laser pointer. YMMV.



#9 ryansmonacles20

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Posted 17 September 2020 - 12:09 PM

Is the link broken for the astrotech ED paradigms at astronomics? I keep trying to get there from cloudy nights top of page advertisement and it says oops something is wrong. 




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