I have forgotten what they are for

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skyhawk
Posts: 559
Joined: Tue Dec 05, 2017 11:53 am
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I have forgotten what they are for

Post by skyhawk »

I have forgotten what they are for

any ideas

thanks
P1050522.jpg
P1050522.jpg (99.44 KiB) Viewed 2692 times
P1050523.jpg
P1050523.jpg (147.59 KiB) Viewed 2692 times
Celestron 8" Edge HD Evolution, Esprit 120mm triplet, 72mm APO, Sky Tee 2, 6" reflecting scope, William Optics Binoviewer, Quark Daystar Ha Chromosphere on 72mm ED, LVW8mm eyepiece and Celestron 19mm Axiom, matched W.O 10 and 20mm, and a few others, D4s, D810,

For info, I am Autistic, Aspergers, ADHD, therefore if I come over as a little "short" on occasions it is not intended, thank you
David Frydman
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Joined: Mon Jan 18, 2010 9:25 am
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Re: I have forgotten what they are for

Post by David Frydman »

It looks like a type of Barlow lens, maybe for a particular eyepiece.

I vaguely recall that I had one.
Maybe by a British accessory maker.

If it is a negative lens, not giving an image, this is likely.

Regards,
David
LeoLion
Posts: 53
Joined: Wed Aug 02, 2006 7:08 pm
Location: Huddersfax , Yorkshire
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Re: I have forgotten what they are for

Post by LeoLion »

The first photo is 'barlowish' and from Astro Engineering (UK) and on sale from Astroboot (UK).Here is a copy/paste from the latters website

New item: By Astro Engineering. The AC555 MagniMax 1.25" filter thread fit photo-visual amplifier lens is new but has been removed from it packaging but is otherwise new. The AC555 screws to 1.25" filter threads on eyepieces and camera nosepieces and provides around 1.5x image scale amplification or visual magnification (depending on spacing the effect may be more or less than 1.5x). This is the latest version of the AC555 and has a male 1.25" filter thread on the rear and a female filter thread on the front. An indispensable accessory.

Hope this helps. My best wishes for Christmas and the New Year
skyhawk
Posts: 559
Joined: Tue Dec 05, 2017 11:53 am
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Re: I have forgotten what they are for

Post by skyhawk »

Thank you
Celestron 8" Edge HD Evolution, Esprit 120mm triplet, 72mm APO, Sky Tee 2, 6" reflecting scope, William Optics Binoviewer, Quark Daystar Ha Chromosphere on 72mm ED, LVW8mm eyepiece and Celestron 19mm Axiom, matched W.O 10 and 20mm, and a few others, D4s, D810,

For info, I am Autistic, Aspergers, ADHD, therefore if I come over as a little "short" on occasions it is not intended, thank you
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