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Orion EZ Finder II

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Orion EZ Finder II was created by albertw

I got a red dot finder in the post today! Havent (obviously!) had a chance to test it out yet, does anyone have any gotchas about these gizmos before I break it? :)

Cheers,
~Al
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
19 years 6 months ago #237

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Replied by spculleton on topic Re: Orion EZ Finder II

I've been so tempted to get a one-power finder. Does anyone have any recommendations, i.e. red-dot vs circles? Are they really better than finderscopes, and how do I attach one to my 'scope beside my finder?
Shane Culleton.

Dozo Yoroshiku Onegai Shimasu
19 years 6 months ago #239

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Replied by albertw on topic Re: Orion EZ Finder II

and how do I attach one to my 'scope beside my finder?


This one comes with a `standard` mounting for an Orion Telescope finder. Which is of no use to me with a Meade LXD55.

The alternatives therefore are to either:
1. screw on the mount for it, mount and screws supplied, which is ok if you have a plain newtonian where you can get at that part of the tube.
2. use the double sided tape provided :)

Orion also sell a mount bracket to connect this to other mounts, but it looked to me as through they wanted an extra $20 for what is basically a different piece of plastic and more double sided tape!

Cheers,
~Al
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
19 years 6 months ago #241

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Replied by spculleton on topic Re: Orion EZ Finder II

Okay, so mounting it shouldn't be a problem.
I've got a Meade 8x50 finder on my SCT and a Celestron 6x30 finder on my newtonian. I find the 6x gives sharper images and that there seems to be a lot of coma in the 8x. Would a one-power finder be better? I'm always worried that I'm just using the finder wrong!
I know this is a bit off topic, but advice would be appreciated.
Shane Culleton.

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19 years 6 months ago #250

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Replied by dave_lillis on topic red dot finders

Hi Al,
My main crux with this sort of thing (having used reticle eyepieces) is that the battery will run out, and probabily sooner then you expect. This might sound abvious but make sure you have it turned off when its "off", if it comes with a dimmer switch.
I've also heard of these finders dewing up prettly quickly, further handycapping you as these types of finders dont gather light like a 8*50 finder would, been limited the naked eye magnitudes.
What size scope do you have this on ?
Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor
19 years 6 months ago #265

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Replied by albertw on topic Re: red dot finders

I've also heard of these finders dewing up prettly quickly, further handycapping you as these types of finders dont gather light like a 8*50 finder would, been limited the naked eye magnitudes.
What size scope do you have this on ?


Its on my 10" LXD55 SN. finder is 6x30.

I have several gripes with finderscopes, which led me down this route:
1. on an equatorial mount like mine you can end up in strange positions tryng to look through the finder.
2. it magnifies the image, sure it gets more light, but if you dont know the patch of sky youre looking at then youre can be in trouble.
3. The orientation of the image in the finder is often different to the orientation in the scope (perhaps due to the way I have to twist my back to look through th £$%^ing thing!)
4. The magnification is different.
Basically I find its not all that easy to correlate what you see in the finder with the view through the eyepiece especially if the finder is slightly out of alignment. Though this may be down to experience.

Aligning the red dot to the scope is fairly easy, plus this scope has a fairly wide field of view with even a 26mm eyepiece (1.33 degrees), so once Im sure where its pointing I can do my searching in the main instrument. This may not hold true for those with long focal length scopes with a narrow field of view though.

More when ive played with it a bit more! I've no idea about dew yet.

Cheers,
~Al
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
19 years 6 months ago #273

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Replied by dave_lillis on topic Re: Orion EZ Finder II

Good points there.
What I don't understand is why don't manufacturers put the finder directly opposite the counterweight side of the optical tube on equatorial mounts, surely this would be advantagous.. (not off at some strange angle)

As for star orientation through a "normal" finder, it does take practice.
Let us know how you get on.
Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor
19 years 5 months ago #287

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Replied by dave_lillis on topic Re: Orion EZ Finder II

Hello Shane,
I also have an 8*50 Meade viewfinder.
I find its optical quality to be average, but then again I mainly use it for the 2 star allignment
of the scope and use the goto facility from there on.
To be honest, the optical quality of my finder is a minor concern to me. Even if it had alot of coma, as long as I could star hop with it, I'd be happy.

One thing you must do is refocus the finder to suit your eye, focusing is done in an untraditional way in that
you must rotate the objective lens dew shied until the image is focused (see your manual)
Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor
19 years 5 months ago #294

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Replied by albertw on topic Re: Orion EZ Finder II

I got to test this properly last night.

The first problem is that it isnt a simple replacement finder as the bolts are in different places, so I had to use the double sided tape. The most convenient place to put it was on top of the current finderscope, though I will move it onto the main tube as this renders the 6x30 finder useless, its too easy to knock it off line turning the finder on and off.

Lining up the pointer was easy, just focus the scope on a star then adjust the finder to put the red dot on the star. Here again is a problem with the double sided tape as its easy to knock it slightly out of alignment every time you touch it.

With that done I put the dot over mars and it was inside the FOV of a 26mm eyepiece. Next I tried for the ring nebula, by pointing the red dot half way between the two stars in Lyra that surround the ring, and the nebula was within the range of a 40mm eyepiece.

It was a fairly damp night, with tubes and plates getting very damp from the dew, however I didnt notice any problems with dew on this device.

In conclusion, I'm very happy with it, much easier than using the 6x30 finder though, I will keep it on for tracking doen some objects. The zero magnification is great since you can just point it at the target and it just works.

On the downside, I'll need something better than double sided tape to attach it to the mount, its just too easy to disturb when you turn it on and off. The only other problem is forgetting to turn it off, some electronic `auto power off` circut in these things would be a good idea!

I'de definatly recommend a device like this to anyone who gets frustrated with fiderscopes on newtonians!

Cheers,
~Al
Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/
19 years 5 months ago #333

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