Is it Amici?
https://www.amazon.c...l/dp/B0CL58L6RH
Amici or not?
Started by
Ernest_SPB
, Mar 15 2025 12:35 PM
12 replies to this topic
#1
Ernest_SPB
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topic starter
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Vanguard
Posted 15 March 2025 - 12:35 PM
#2
ButterFly
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Cosmos
Posted 15 March 2025 - 12:53 PM
Only $40 to take it apart and find out for sure!
You can see the face angles in this cropped picture though:
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#3
sevenofnine
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Cosmos
Posted 15 March 2025 - 01:39 PM
Since it's erecting and has prisms wouldn't it have to be Amici? 
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#4
triplemon
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Apollo
Posted 15 March 2025 - 05:24 PM
Well, if you are ok with the in and outgoing path to not be in the same plane, there are other schemes you could do. Using either prisms or two mirrors.
Granted, this one doesn't look like that.
Granted, this one doesn't look like that.
#5
ABQJeff
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Skylab
Posted 15 March 2025 - 06:15 PM
Since it's erecting and has prisms wouldn't it have to be Amici?
No, the vast majority of prism diagonals are non-correct image erecting prisms. All diagonals erect, if right and left are correct also then it is an Amici.
In this case, I bet this is NOT an Amici and a regular prism diagonal.
Jeff
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#6
sevenofnine
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Cosmos
Posted 15 March 2025 - 06:43 PM
Because it looked similar to this one by Baader, I assumed correct image 
https://agenaastro.c...45-2956150.html.
#7
Jon Isaacs
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ISS
Posted 15 March 2025 - 08:46 PM
Only $40 to take it apart and find out for sure!
You can see the face angles in this cropped picture though:
It appears to be a duplicate of the entry level Celestron correct image diagonal. I roughly measured the clear aperture of the Celestron in at 14 mm. This one looks similar.
It's not worth $40.
Jon
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#8
CrazyPanda
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Fly Me to the Moon
Posted 15 March 2025 - 09:31 PM
Only $40 to take it apart and find out for sure!
You can see the face angles in this cropped picture though:
Yeah was gonna say, that image confirms it's an amici prism.
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#9
ButterFly
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Cosmos
Posted 18 March 2025 - 01:46 AM
It's not worth $40.
You don't have to keep it!
#10
Jon Isaacs
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ISS
Posted 18 March 2025 - 02:17 AM
You don't have to keep it!
If I buy it, what am I going to do with it?
Why spend the $40 when one can buy a better Amici prism Diagonal with a clear aperture of 20mm for $33?
A 1.25 inch diagonal with 14mm clear aperture will severely vignette with many eyepieces.. A 1.25 inch diagonal with 20mm of clear aperture will only vignette noticeably with eyepieces like a 24mm SWA or a 32mm Plossl.
https://agenaastro.c...m-diagonal.html
Jon
#11
ButterFly
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Cosmos
Posted 18 March 2025 - 08:25 PM
If I buy it, what am I going to do with it?
Inspect it to answer the question, then return it. I assumed you would have understood that, but now I know better.
#12
Dobs O Fun
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Aurora
Posted 18 March 2025 - 11:18 PM
Ok folks, let's not get sideways here.
#13
Jon Isaacs
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ISS
Posted 19 March 2025 - 06:00 AM
Inspect it to answer the question, then return it. I assumed you would have understood that, but now I know better.
As I mentioned, I have owned several of the Celestron diagonals that appear identical. They come with the Powerseeker scopes among others. I measured the clear aperture at about 14mm. From the images, this diagonal also seems to have a limited clear aperture of about very similar dimensions.
I do not recommend these, the AgenaAstro style in my previous post is superior and less expensive. That 14mmm clear aperture really limits the TFov.
https://m.media-amaz...._AC_SX466_.jpg
https://www.ebay.com...UwaApeBEALw_wcB
Jon
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