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Old Thursday 14th September 2017, 20:59   #1
Racuuna
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Meopta s2 82 hd + astro eyepieces

Hello!

I have been trying several different astro eyepieces for my meopta scope the last years. The astro eyepieces opens up new possibilities in an already fantastic scope.
For the moment i`m using a baader morpheus 12,5mm and a televue nagler 16mm. The baader is about 34x on the meopta and the televue is a 26x. The main big improvement over the original meopta okulars is the wide fov.
The nagler has a fantastic 82 degree fov but unfortunately the field stop on the 16mm is to large wich causes some vignetting in the outer 2-3% of the field. I found out that the fieldstop needs to be under 20mm to work properly on the meopta.
The baader is little different, with a fov of 76 degrees the image feels very large but not quite as big as the nagler. Still a lot bigger than the 30-60x with its 66 degrees
The morpheus got a fieldstop at 17mm so the field is sharp right out to the edges.
Meopta doesn`t build an astro adapter to their scope, at least i can`t find one.
I am using the adapter that meopta makes for the s2 scope for the s1 75 scope eyepieces. It is a perfect match for the 1,25" eyepices.
With a little finetuning you will get the eyepieces perfectly centered in the adapter. After that i`m taking little epoxy glue and permanently attach it to the adapter, with all the eyepieces i`ve tried so far it has worked perfectly.

The next project would be to try the more expanse eyepieces like the ethos with its 100 degree fov.

Would be interesting to hear others who is using astro eyepieces in spottingscopes and especially if someone have tried some of the eyepieces with 100 degrees and over.

I will attach some photos of the equipment.

Many thanks
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Old Friday 15th September 2017, 08:11   #2
kabsetz
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Racuuna,

By fine-tuning the adapter, what do you mean precisely? Do you have to sand or whittle away from the inside of the adapter to fit a 1,25" barrel, or do you need to build up to remove looseness? A picture of the inside of the adapter might be useful for those thinking of doing this.

Kimmo
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Old Friday 15th September 2017, 09:14   #3
Racuuna
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Hello Kimmo!
Sorry for the insufficient info.
I've made it as simple as possible, since the hole in the adapter is bigger than the barrel of the eyepiece you bred to build up around it.
I'm using the front cap of the eyepiece to do so. By simply cut away the bottom of the cap and then press it down the adapter the space between adapter and eyepiece is eliminated.
Then hardly press down the eyepiece in the adapter and you will have it tight and centered in the adapter.
After that i just attach some glue or tape to make it fixed.
I Will add some photos.

Thanks
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Last edited by Racuuna : Friday 15th September 2017 at 11:56.
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Old Saturday 16th September 2017, 20:25   #4
Racuuna
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More photos.
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Old Sunday 17th September 2017, 00:04   #5
DRodrigues
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Well done Racuuna.

This means that Meopta could do easily an astro-adapter and increase their S2 sells...
Someone with a CNC machine can also easily produce a tube with 1.25" inner hole diameter that fits the Meopta adapter, even including the thread of the S1 eps...

Can you please measure the diameter of the Meopta zoom at the place indicated by the yellow arrows? Just to see if I could adapt it to my Optolyth 100...

By the way, the vignetting of the Nagler 16 persists if you place the ep directly on the scope without the adapter? Might be the internal diameter of the adapter hole that is inducing the vignetting...

At http://www.pt-ducks.com/cr-telescope...mm%20eyepieces you can see a 110 in a scope...
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Old Sunday 17th September 2017, 07:03   #6
Racuuna
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Hello David!
Measuring the meopta eyepiece it is about 42 mm att it's widest place.

It's great meopta made this adapter and it works really well. So far i've had no focus problem with any of the astro eyepieces i've tried in it.

To the nagler. Unfortunately it vignettes event whitout the adapter. The hole in the adapter is a Little bit larger than the naglers fieldstop.
Seems like the prism of the meopta Scope can't take that big fieldstop. I've seen the same result in an brunton epoch Scope.
But when attach to my Canon ef 400 5.6 with the adapter the nagler doesn't vignette, only to bad the image is upside down☺️

Ultra wide eyepieces is quite someting. Hard to go back once you tried them.
Can't help to think docter uwa 12,5 would be fantastic. Also the ethos 10 mm should work without vignetting in the meopta.
Maybe even a Takahashi 10 mm uwa could be considered interesting☺️
Thanks
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Last edited by Racuuna : Sunday 17th September 2017 at 09:42.
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