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Sigma-XQ Mirror Ultra-Telephoto 1:8 f=500mm

 
 
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visualopsins



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Joined: 05 Mar 2009
Posts: 4057
Location: California

Expire: 2013-01-05

PostPosted: Sat Nov 24, 2012 4:33 am    Post subject: Sigma-XQ Mirror Ultra-Telephoto 1:8 f=500mm Reply with quote

AKA Spiratone Ultra-tel

The lens elements diagram show rear group is 3 elements (of 5 total + 2 mirrors):

calvin83 wrote:
http://www.mobile01.com/topicdetail.php?f=255&t=2469228&p=1


The Sigma documentation included with the lens also specifies 5 elements in 5 groups.

I take mine apart to clean -- there are only two elements in the rear group(!) with air spacer between. I don't think anything is missing because lens is pretty sharp. There doesn't appear to be enough room for another element.

Can anybody with this lens please look to see how many elements are in the rear group?


_________________
like attracts like!

http://tinyurl.com/bgaho3q

Cameras: Canon 5Dc, Spotmatics II, F, ESII

Lenses: S-M-C Fisheye-Takumar 1:4/17, S-M-C Takumars 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, SMC Takumar 1:1.4/50, S-M-C Takumars 1:1.8/85, 1:2.8/105, 1:2.8/120, 1:135/2.5 (II), 1:4/200, 1:4.5/500, Macro-Takumar 50/4 (1:1), & S-M-C Macro-Takumar 100mm


Last edited by visualopsins on Sat Nov 24, 2012 4:52 am; edited 2 times in total
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calvin83



Level 4

Joined: 12 Apr 2009
Posts: 3446
Location: Hong Kong


PostPosted: Sat Nov 24, 2012 4:42 am    Post subject: Re: Sigma-XQ Mirror Ultra-Telephoto 1:8 f=500mm Reply with quote

visualopsins wrote:
AKA Spiratone Ultra-tel

The lens elements diagram show rear group is 3 elements (of 5 total + 2 mirrors):

calvin83 wrote:
http://www.mobile01.com/topicdetail.php?f=255&t=2088911&last=26961253#26952670#26952670


The Sigma documentation included with the lens also specifies 5 elements in 5 groups.

I take mine apart to clean -- there are only two elements in the rear group(!) with air spacer between. I don't think anything is missing because lens is pretty sharp. There doesn't appear to be enough room for another element.

Can anybody with this lens please look to see how many elements are in the rear group?

The link you quote is the F4 version. For the F8 version, the sigma booklet shows the rear group behind the mirror consist of two elements. I cannot post the booklet here due to copyright issue.
_________________
The best lens is the one you have with you. Life is too short to let us try every lenses!

Camera and Tripod: Sony NEX-5N+18-55 OSS, Bessa R+Color-Skopar Classic 2.5/35, Benro C2691TB1+PS-N5B QR plate

M42: CZ Ultron 1.8/50, Primoplan 1.9/58, Eurygon 2.8/30, Yashinon 1.4/50 and 2.8/60 macro, Fujica 3.5/28 and much more...
Exakta: Biotar 2/58, Angenieux 2.5/35, Quinaron 2.8/35, Culmigon 4.5/35, Quinar 3.5/100, Tele-Quinar 2.8/135, RE. Auto-Topcor 4/20, 2.8/35, 1.4/58, 1.8/58, 3.5/58 macro and 1.8/85 and other lenses...
Retina S/DKL: Curtagon 4/28, Eurygon 4/35, Xenon 1.9/50, Quinon 1.9/50 x2, Heligon 1.9/50 x2, Lithagon 3.5/35, Ultralit 2.8/50
Enlargers: GreatWall 3.5/90(build in helicoid), Hexar 3.5/75, Meopta 4.5/135, Ross 4/9cm, Helioplan 4,5/105, Travegar 105mm F3.5, Trylor 135mm F4.5 and some other enlargers
RF: Canon 50mm F1.8 LTM, Jupiter 8 red p 2/50 LTM, Jupiter 9 Zorki 1951 LTM, Opton-Sonnar T 1.5/50 and CZJ Sonnar T 2/85 Contax RF
Others: Tokina AT-X 2.5/90 C/Y, Helios 44 m39, X-Fujinon 1.6/50, Komura 4/24 FD, KMZ PO3-3M 2/50, Lecia R 2/90, Tamron SP 5.6/350 Reflex and much more new lens to be mentioned.


My Flickr
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visualopsins



Level 4

Joined: 05 Mar 2009
Posts: 4057
Location: California

Expire: 2013-01-05

PostPosted: Sat Nov 24, 2012 5:01 am    Post subject: Re: Sigma-XQ Mirror Ultra-Telephoto 1:8 f=500mm Reply with quote

calvin83 wrote:
visualopsins wrote:
AKA Spiratone Ultra-tel

The lens elements diagram show rear group is 3 elements (of 5 total + 2 mirrors):

calvin83 wrote:
http://www.mobile01.com/topicdetail.php?f=255&t=2088911&last=26961253#26952670#26952670


The Sigma documentation included with the lens also specifies 5 elements in 5 groups.

I take mine apart to clean -- there are only two elements in the rear group(!) with air spacer between. I don't think anything is missing because lens is pretty sharp. There doesn't appear to be enough room for another element.

Can anybody with this lens please look to see how many elements are in the rear group?

The link you quote is the F4 version. For the F8 version, the sigma booklet shows the rear group behind the mirror consist of two elements. I cannot post the booklet here due to copyright issue.


Thank you so much! I corrected the link in my message to show 500/8 page. The diagram on that page must be wrong...and the booklet that came with my lens is wrong too(!). My booklet has no lens diagram. I guess your documentation is corrected informations. Thank you!
_________________
like attracts like!

http://tinyurl.com/bgaho3q

Cameras: Canon 5Dc, Spotmatics II, F, ESII

Lenses: S-M-C Fisheye-Takumar 1:4/17, S-M-C Takumars 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, SMC Takumar 1:1.4/50, S-M-C Takumars 1:1.8/85, 1:2.8/105, 1:2.8/120, 1:135/2.5 (II), 1:4/200, 1:4.5/500, Macro-Takumar 50/4 (1:1), & S-M-C Macro-Takumar 100mm
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calvin83



Level 4

Joined: 12 Apr 2009
Posts: 3446
Location: Hong Kong


PostPosted: Sat Nov 24, 2012 5:10 am    Post subject: Re: Sigma-XQ Mirror Ultra-Telephoto 1:8 f=500mm Reply with quote

visualopsins wrote:
calvin83 wrote:
visualopsins wrote:
AKA Spiratone Ultra-tel

The lens elements diagram show rear group is 3 elements (of 5 total + 2 mirrors):

calvin83 wrote:
http://www.mobile01.com/topicdetail.php?f=255&t=2088911&last=26961253#26952670#26952670


The Sigma documentation included with the lens also specifies 5 elements in 5 groups.

I take mine apart to clean -- there are only two elements in the rear group(!) with air spacer between. I don't think anything is missing because lens is pretty sharp. There doesn't appear to be enough room for another element.

Can anybody with this lens please look to see how many elements are in the rear group?

The link you quote is the F4 version. For the F8 version, the sigma booklet shows the rear group behind the mirror consist of two elements. I cannot post the booklet here due to copyright issue.


Thank you so much! I corrected the link in my message to show 500/8 page. The diagram on that page must be wrong...and the booklet that came with my lens is wrong too(!). My booklet has no lens diagram. I guess your documentation is corrected informations. Thank you!

The diagram on the link is the Pentax 1000mm f/11 mirror lens. Both the F4 and F8 version has similar optical construction except the F4 version has separate front lens group.
_________________
The best lens is the one you have with you. Life is too short to let us try every lenses!

Camera and Tripod: Sony NEX-5N+18-55 OSS, Bessa R+Color-Skopar Classic 2.5/35, Benro C2691TB1+PS-N5B QR plate

M42: CZ Ultron 1.8/50, Primoplan 1.9/58, Eurygon 2.8/30, Yashinon 1.4/50 and 2.8/60 macro, Fujica 3.5/28 and much more...
Exakta: Biotar 2/58, Angenieux 2.5/35, Quinaron 2.8/35, Culmigon 4.5/35, Quinar 3.5/100, Tele-Quinar 2.8/135, RE. Auto-Topcor 4/20, 2.8/35, 1.4/58, 1.8/58, 3.5/58 macro and 1.8/85 and other lenses...
Retina S/DKL: Curtagon 4/28, Eurygon 4/35, Xenon 1.9/50, Quinon 1.9/50 x2, Heligon 1.9/50 x2, Lithagon 3.5/35, Ultralit 2.8/50
Enlargers: GreatWall 3.5/90(build in helicoid), Hexar 3.5/75, Meopta 4.5/135, Ross 4/9cm, Helioplan 4,5/105, Travegar 105mm F3.5, Trylor 135mm F4.5 and some other enlargers
RF: Canon 50mm F1.8 LTM, Jupiter 8 red p 2/50 LTM, Jupiter 9 Zorki 1951 LTM, Opton-Sonnar T 1.5/50 and CZJ Sonnar T 2/85 Contax RF
Others: Tokina AT-X 2.5/90 C/Y, Helios 44 m39, X-Fujinon 1.6/50, Komura 4/24 FD, KMZ PO3-3M 2/50, Lecia R 2/90, Tamron SP 5.6/350 Reflex and much more new lens to be mentioned.


My Flickr
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