Σπάνια και ασυνήθιστα Telescope Designs ...

[ngc4565]

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Εδώ τα παιδιά είναι μερικά πολύ σπάνια και ασυνήθιστα σχέδια τηλεσκοπίων

 

http://bhs.broo.k12.wv.us/homepage/alumni/dstevick/weird.htm

 

Enjoy!!

[ngc4565]

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Εδώ ενα Schiefspiegler στο Stellafane Convention 2007.

 

http://www.astrovox.gr/forum/album_pic.php?pic_id=5721

[παναγιωτης]

... Τι να πω... Θες πολύ φαντασία για να τα κάνεις αυτά...

[zantespear]

Eχεις δει μέσα από Schief ποτέ Frank?

[eliasg2004]

Εδώ ενα Schiefspiegler στο Stellafane Convention 2007. Cool

 

http://www.astrovox.gr/forum/album_pic.php?pic_id=5721

 

Frank, you are not going to believe this! Yesterday, I had a deal in astromart and sold an eyepiece to a fellow American amateur astronomer. As we exchanged emails, at some point he told me that he planned to use it with a home made Schiefspiegler. Naturally, I mentioned your post and pointed out to him a link of the last photo you uploaded. This is the answer I got from him today:

"Ilias-

You are not going to believe this.... but the picture you sent me- of the Schief that your friend sent- is a picture of a very good friend of mine's schief!!! Gary Fuchs!

Dave Groski designed the schief I built, it's known as the Delmarve Schief. He helped Gary build his... and both coached me on mine. Dave- and especially Gary became very good friends of mine... I email with Gary almost daily! Here's some additional pic's of him- and his scope....

 

· Name: Gary L. Fuchs

 

· From: Easton, PA

 

· Instrument: 4.25" f/27 Schiefspiegler

 

· Entered: [19] Optical & Mechanical

 

· Award: 2nd Place (Tie) Optical Compound

 

If the pic’s or part of this doesn’t come through, you can go here to see:

 

http://stellafane.org/convention/2007/scopes.html

 

Dave Groski’s Schuppman’s also on here… both these guys won awards at stellefane.

 

Here’s a link to pic’s of mine:

 

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/2163063/page/6/view/collapsed/sb/5/o/all/fpart/1

 

It’s an awesome scope.

 

I’ll tell you… it’s a small world!!!!!

Wes"

 

It is a small world indeed

Best regards,

Ilias.

[ngc4565]

Eχεις δει μέσα από Schief ποτέ Frank?

 

Φιλε Σπύρο,

Έχω παρατηρήσει με 5 διαφορετικά Schiefspieglers - ενα είναι εδώ στο Μόντρεαλ και ανήκει στο φίλο μου τον Constantine ...

 

 

It is a small world indeed

 

Φιλε Ilias,

I had the opportunity to see this telescope at Stellafane and I remember chatting with the owner.

 

I have mentioned this numerous times in previous posts, "Stellafane is indeed one of my favorite Star Party Conventions"

 

I have been attending Stellafane since 1989 - I have observed through literally many hundreds of telescopes at this convention, and I have learned (and seen) what it means for a telescope to have "good optics".

 

Nowhere else can you see such exotic designs and at the same time have the opportunity to discuss the optical and mechanical components with the people who actually designed and built the telescopes.

 

The friendships that you make at these conventions last a lifetime.

 

Below is an image of another Schiefspiegler that was at the Stellafane convention in 2005.

 

Give my regards to your friend Wes.

 

It's a small world indeed.

Cheers !!

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Schiefspiegler at Stellafane 2005

[Fred Ley]

Hey Frank,

 

Speaking of Scheifspeigler's, here's one that I photographed in 1985 at the RTMC (Riverside Telescope Makers Conference). It is made by Kevin Medlock who did the machining. He lives in the San Francisco Bay area area. He once took an 18inch scope to Stellafane back in 1980-if memory serves me correctly.

 

-Fred

[eliasg2004]

I asked Wes to send me some photos of his scope to upload in our forum. He also sent me a "first light" photo. In his own words: "The moon pic I took the first night out with the scope, just holding my pocket digital camera up to the

eyepiece... first attempt at afocal photography... a little blurry, wish I could have captured how sharp the image actually was!"

An fine instrument and - as it shows in one of the photos - a happy owner and skilled ATM

[eliasg2004]

Για την ιστορία, έστειλα το σύνδεσμο αυτού του θέματος στον Wes, γι αυτό εξάλλου προτίμησα να γράψω παραπάνω στα αγγλικά. Απίστευτη σύμπτωση και απόδειξη για το πόσο μικρός είναι ο κόσμος μας

[ngc4565]

Για την ιστορία, έστειλα το σύνδεσμο αυτού του θέματος στον Wes, γι αυτό εξάλλου προτίμησα να γράψω παραπάνω στα αγγλικά. Απίστευτη σύμπτωση και απόδειξη για το πόσο μικρός είναι ο κόσμος μας

Φιλε Ilias,

Πολύ ωραιο τηλεσκοπίο του Wes.

 

 

Speaking of Scheifspeigler's, here's one that I photographed in 1985 at the RTMC

Hi Fred,

Another wonderful Scheifspeigler telescope, thanks for sharing.

 

Παιδιά προσδοκώ για να δω ένα Yolos και ένα Tetra-Schiefspiegler τηλεσκόπιο

 

Fred have you ever seen one of these?

[zantespear]

Ένα πάρα πολύ ενδιαφέρον θέμα!!!

Έχω αρχίσει εδώ και λίγο καιρό να μελετάω την κατασκευή τηλεσκοπίων. Ξεκίνησα από το forum του cloudynights. Kαταρχήν ο Dave Groski είναι ένα από τα καλύτερα μέλη του forum αφού δίνει πάντα τρομερές πληροφορίες για οτιδήποτε. Τα Schief μου είχαν τραβήξει την προσοχή από την αρχή αν και τεχνικά δεν είναι και το πιο εύκολο για να ξεκινήσεις, λόγο του σωλήνα.

Εντούτοις έχουν ορισμένα τρελά χαρακτηριστικά:

-Είναι δυνατόν επειδή τα οπτικά τους κατασκευάζονται μαζί (το ένα γυαλίζει το άλλο) να φτασουν σε πραγματικά τρελό λόγους λ. Ένα άλλο μέλος του cloudynights που κατασκεύασε schief με τη καθοδήγηση του Groski έβγαλε ένα λόγο λ κοντά στο λ/30!!

-Λόγο του πολύ μεγάλου εστιακού λόγου (του τύπου αν θυμάμαι καλά ήταν f25) φημίζονται για τη μεγένθυνση που μπορούν να σηκώσουν.

[Fred Ley]

Hey Frank,

 

Here we have an example of a Tri-Schiefspiegler at the 1985 RTMC.

It was built by Gerry Logan and is a 6-inch f/14.7 system.

There have been a few Yolo's floating around over the years at RTMC. I will have to dig into my slide collection to see if I have an image of one.

 

-Fred

[ngc4565]

Hi Fred,

Good stuff.

 

I checked back and at the Stellafane 2000 convention there was indeed a 8" f-20 Buchroeder Tri-Schiefspiegler on a Dobsonian Mount that was entered in the competition. It was entered by John Biretta, Jeff Hutton & Dick Wessling. This telescope won 3-rd place for mechanical design.

http://stellafane.org/post_conv/2000_conv/2000_all_scopes04.html

 

There was another 4.24" F-26 Schiefspeigler on Equatorial Mount presented by William Cheng in the 2004 convention.

http://stellafane.org/post_conv/2004_conv/2004_all_scopes02.html

 

I never got to see these telescopes because (they were presented on EVEN years) and this is when we are on vacation in Greece.

 

I am curiously anticipating a Yolos entry sometime soon.

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http://www.astrovox.gr/forum/album_pic.php?pic_id=5727

[ngc4565]

-Λόγο του πολύ μεγάλου εστιακού λόγου (του τύπου αν θυμάμαι καλά ήταν f25) φημίζονται για τη μεγένθυνση που μπορούν να σηκώσουν.

 

Σωστα Φιλε Σπύρο.

 

Εντούτοις ενα μειονέκτημα (at f25) είναι ότι δεν έχουν lower power wide field views.

Ένα 4.25" @ f/25 (2700mm fl) και με ένα προσοφθάλμιο 32mm μας δίνει 84x

 

Επίσης το maximum χρησιμο magnification για οποιαδήποτε 4,25" τηλεσκόπιο (καλής ποιότητας) είναι περίπου 200x - 250x ανάλογα με τις ατμοσφαιρικές συνθήκες.